エヌ・エス・ティ List of Products and Services

In this seminar, we will introduce the pre-test planning feature of Simcenter 3D FE Model Correlation. Is there a way to conduct pre-test planning more efficiently before performing modal testing, ensuring that the target vibration modes are obtained and conducting accurate modal tests using only the minimum necessary exciters and sensors? Simcenter 3D FE Model Correlation meets these requests from experimental analysis engineers! Simcenter 3D FE Model Correlation has excellent features for efficiently conducting pre-test planning, allowing for the optimization of the position and number of sensors/measurement points and excitation points during modal testing. 【Event Overview】 ■ Date and Time: January 15, 2025 (Wednesday) 14:00 - 14:30 ■ Location: Online ■ Participation Fee: Free ■ Capacity: Unlimited ▼ For details and registration, click here ▼ https://www.cae-nst.co.jp/seminar/201223/ *For more information, please download the PDF or feel free to contact us.

• Other Software

We will hold a web seminar titled "Introduction of New Features in NST Assist 2024.3." NST Assist is a set of customization tools designed to make Femap more convenient to use. These are our proprietary customization tools that enable functionalities not available in Femap's standard features and simplify and streamline cumbersome operations. NST Assist is scheduled for updates every three months. In this seminar, we will introduce the new features and improvements in NST Assist 2024.3. New features: - ERPcontroll - ERPImport We will also showcase several existing features with demonstrations. ▼ For details and registration, please click here ▼ https://www.cae-nst.co.jp/seminar/200131/ ■ Introduction of New Features in NST Assist 2024.3 - Date: January 22, 2025 (Wednesday) - Time: 14:00 - 14:30 (Registration starts at 13:50) - Location: Online - Cost: Free - Capacity: Unlimited *For more details, please download the PDF or feel free to contact us.

• Other Software

We will hold a WEB seminar titled "Pre-Test Planning with Simcenter 3D." "Is there a way to conduct pre-test planning more efficiently before performing modal testing, ensuring that the target vibration modes are obtained and that high-precision modal tests can be conducted using only the minimum necessary exciters and sensors?" Simcenter 3D FE Model Correlation addresses such requests from experimental analysis engineers. Simcenter 3D FE Model Correlation offers excellent features for efficiently conducting pre-test planning, allowing for the optimization of the positions and numbers of sensors/measurement points and excitation points during modal testing. ▼ For details and registration, click here ▼ https://www.cae-nst.co.jp/seminar/201223/ 【Event Overview】 ■ Date: January 15, 2025 (Wednesday) ■ Time: 14:00 - 14:30 ■ Location: Online ■ Cost: Free (Pre-registration required) ■ Capacity: Unlimited *For more details, please download the PDF or feel free to contact us.

• others

We would like to introduce our analysis titled "Behavior Analysis of Diaphragm Springs Using Nonlinear Static Analysis." When a load is applied to a disc spring, the shape of the spring is complex, resulting in not only bending but also twisting and buckling. Additionally, the support conditions are not constant, making it impossible to determine the load and stress using simple cantilever beam theory. In this analysis example, we were able to reproduce the jumping phenomenon of a diaphragm spring used in automotive clutches by conducting nonlinear static analysis on its behavior. [Case Summary] ■ Analysis Type: Nonlinear Static Analysis ■ Analysis Result: Reproduction of bidirectional jumping deformation of the diaphragm spring *For more detailed information about the case, please refer to the related links. Feel free to contact us for further inquiries.

• Analysis and prediction system

We would like to introduce our analysis on "Pressure Distribution Analysis of Brake Pads using Nonlinear Analysis." To reduce brake noise, it is necessary to control the rigidity of the caliper and the pads. In examining the rigidity of the caliper and pads, it is important to understand the rigidity distribution caused by the pressure distribution between the disc and the pads. The model for this case consists of the caliper, piston, plate, and pads. We applied pressure to the piston and caliper and conducted a nonlinear static analysis that includes the nonlinear friction coefficient between the pads and the disc. [Case Overview] ■ Model: Caliper, Piston, Plate, and Pads ■ Analysis Content - Pressure was applied to the piston and caliper, and a nonlinear static analysis including the nonlinear friction coefficient between the pads and disc was performed using "NX Nastran (SOL601)." *For more detailed information about this case, please refer to the related links. Feel free to contact us for more details.

• Analysis and prediction system

We would like to introduce the "Nonlinear Transient Analysis of Brake Rotors" conducted by our company. The coupling of thermal and structural analysis is necessary due to the heat transfer that occurs when the rotating rotor and the pad come into contact. Friction generates heat, leading to uneven thermal expansion and resulting in stress. In this case, we completely constrained the nodes around the holes of the rotating rotor and performed thermal stress analysis by applying heat flux and heat transfer coefficients to the inner and outer surfaces of the rotating rotor, as well as heat transfer coefficients to the surfaces of the fins and hats. [Analysis Overview] - Completely constrained the nodes around the holes of the rotating rotor - Applied heat flux and heat transfer coefficients to the inner and outer surfaces of the rotating rotor, as well as heat transfer coefficients to the surfaces of the fins and hats *For detailed information about this case, please refer to the related links. Feel free to contact us for more details.

• Analysis and prediction system

We would like to introduce the "Optimization Analysis of Connecting Rod Shape" conducted by our company. In this case, we sought the shape that minimizes the equivalent stress while maintaining the volume when compressive and tensile loads are applied to the connecting rod. Additionally, we performed optimization with the condition that the elliptical deformation of the large end hole under tensile load is minimized, as well as optimization that maintains stress and displacement while minimizing volume. 【Stress Minimization Results】 ■ Equivalent Stress Reduction Rate - Under compressive load: Approximately 25% - Under tensile load: Approximately 28% ■ Number of Optimization Iterations: 50 ■ Analysis Time: 21 minutes *Detailed information about this case can be viewed through the related links. For more information, please feel free to contact us.

• Analysis and prediction system

We would like to introduce the "Thermal Fluid Analysis of Mufflers" conducted by our company. By combining "Femap Thermal" and "Femap Flow," we calculated the flow of exhaust gases within the muffler and the temperature distribution of the muffler due to high-temperature exhaust. We performed thermal fluid analysis targeting the muffler, determining the temperature difference of exhaust gases at the inlet and outlet, the flow of exhaust gases within the muffler, and the temperature of the surface of the muffler structure, confirming that we could obtain the parameters necessary for design. 【Case Overview】 ■ Products Used ・Femap Thermal ・Femap Flow ■ Analysis Content ・Thermal fluid analysis targeting the muffler *Detailed information about the case can be viewed through the related links. For more information, please feel free to contact us.

• Analysis and prediction system

We would like to introduce our analysis of "Cabin Acoustic Characteristics of Tracks Using Acoustic Coupled Analysis Function." In recent years, considering low-noise environments has become very important. It is effective to use finite element method analysis to understand the acoustic characteristics of the cabin at the design stage and to reduce noise transmission to the driver through structural considerations. In this case study, we utilized the NX Nastran structural-acoustic coupled analysis function to model the vehicle body structure and the acoustic space within the cabin, conducting a coupled frequency response analysis to determine the acoustic transmission characteristics from the body mount points to the driver's ear position. 【Case Overview】 ■ Function Used: NX Nastran Structural-Acoustic Coupled Analysis Function ■ Analysis Content - Model the vehicle body structure and the acoustic space within the cabin - Conduct coupled frequency response analysis - Determine the acoustic transmission characteristics from the body mount points to the driver's ear position *Detailed information about the case can be viewed through the related links. For more details, please feel free to contact us.

• Analysis and prediction system

We would like to introduce the "Analysis of Power Transformer Leakage Loss" conducted by our company. The analysis mode is frequency response analysis (Time Harmonic), and the rated power of the power transformer is 100 MVA. The input frequency is 50 Hz/AC. As a result of the analysis, it was found that the leakage magnetic flux generated from the transformer coil is being significantly and widely collected at the shunt wall. 【Analysis Conditions】 ■ Analysis Mode: Frequency Response Analysis (Time Harmonic) ■ Power Transformer Rating: 100 MVA ■ Input Frequency: 50 Hz/AC ■ Shunt Wall (Flux Collector): Magnetic Material ■ Frame Material, Tank Material: Carbon Steel *Details of the case can be viewed through the related links. For more information, please feel free to contact us.

• Analysis and prediction system

We would like to introduce the "Thrust Force Analysis of Linear Actuators" conducted by our company. In this case study, we analyzed the impact of differences in magnet length on the thrust direction and stroke of the motor. As a result of the analysis, we confirmed the presence or absence of magnetic saturation in the magnetic flux field circuit under the driving conditions of the motor, and found that magnetic saturation did not occur and the magnetic flux field was stable. 【Analysis Conditions】 ■ Driving Conditions: Input Current DC-1A/Phase ■ Stroke Operation Time: 4ms (Design Stroke Time Range 1-3ms) 　※ Design Stroke: -10mm to 10mm ■ Magnet Length Variation Width: -1mm, +3mm, +7mm (based on 60mm width) 　※ The magnet length was set as a variable, and calculations were performed for the above three variation widths. *Details of the case study can be viewed through the related links. For more information, please feel free to contact us.

• Analysis and prediction system

We would like to introduce our analysis of the "Air Gap Magnetic Flux Density Analysis of Embedded Magnet Synchronous Motors (IPMSM)." The analysis mode used was transient response analysis, and the driving condition was no load at 3,000 min-1, with the analysis executed at the 45° position in the right diagram for 1/8 of the area (2D). As a result of the analysis, it was found that the magnetic flux density penetrating the air gap between the stator and rotor changes relative to the excitation timing of the stator coil of the rotating rotor. Therefore, analyzing the dynamic behavior is considered an effective approach. 【Analysis Conditions】 ■ Analysis Mode: Transient Response Analysis ■ Motor Specifications: 3-phase / 8-pole / 48-slot, distributed winding ■ Driving Conditions: No load / 3,000 min-1 ■ Analysis executed at the 45° position in the right diagram for 1/8 of the area (2D) ■ The air gap (air layer) between the stator and rotor is processed in 4 layers *For detailed information about this case, please refer to the related links. For more information, feel free to contact us.

• Analysis and prediction system

We would like to introduce the "Magnet Demagnetization Analysis of Interior Permanent Magnet Synchronous Motors (IPMSM)" conducted by our company. The analysis mode is transient response analysis, and the motor specifications are 3-phase, 8-pole, 48-slot, with distributed winding. The driving condition is 3,000 min^-1. As a result of the analysis, it was found that the demagnetization occurs at locations on the rotor core where the magnetic flux density is high, and it was also determined that the surrounding temperature of 125°C affects the coercivity reduction of Nd-Fe-B magnets. 【Analysis Conditions (Partial)】 ■ Analysis Mode: Transient Response Analysis ■ Motor Specifications: 3-phase, 8-pole, 48-slot, distributed winding ■ Driving Condition: 3,000 min^-1 ■ Magnet Surrounding Temperature: 125°C ■ Location of Electrical Short Circuit: Between Stator Windings *Details of the case can be viewed through the related links. For more information, please feel free to contact us.

• Analysis and prediction system

"Simcenter STAR-CCM+" is a general-purpose thermal fluid analysis software that allows you to manage data in a single file. Since it is an integrated environment, automating work processes such as running calculations and evaluating results is easy. With its rich set of physical models and functions, it can analyze various phenomena in a complex manner. 【Features】 ■ Integrated environment ■ Automatable workflow ■ Flexible and highly robust modeling capabilities ■ Comprehensive multiphysics ■ Abundant physical models *For more details, please download the PDF or feel free to contact us.

• Other Software

"Simcenter FLOEFD for Solid Edge" is an add-on fluid analysis application that operates on Solid Edge (3D CAD) and achieves a balance of "speed," "ease of use," and "high accuracy." By adopting voxel mesh, mesh creation is simplified. It automatically determines the boundaries between solids and fluids, allowing tasks that typically take several days with conventional CFD software to be completed in just a few minutes. It can automatically recognize areas where mesh sizes should be set finer, such as boundaries between solids and fluids or narrow flow paths, and it can be configured to any desired size. 【Features】 ■ Add-on tool that can be used on CAD ■ Standardized setup procedures ■ Coupling with structural analysis is possible *For more details, please download the PDF or feel free to contact us.

• Scientific Calculation and Simulation Software

"HEEDS" is a multi-domain analysis and design exploration tool that explores the design space, achieving a reduction in design/development time and lifecycle costs. By utilizing this product, designers and engineers can quickly find innovative solutions that meet all performance criteria. Additionally, it features a rich set of direct interfaces compatible with commercial CAD/CAE tools and an intuitive GUI for easy operation. We also offer trials, so please feel free to contact us. 【Features】 ■ Trial available ■ Explores the design space, achieving a reduction in design/development time and lifecycle costs ■ Strengths include ease of use, advanced design space exploration technology, and high-quality service *For more details, please download the PDF or feel free to contact us.

• Other Software

**Case Summary** ■Product Name: NX Nastran ■Industry: Mechanical Components NX Nastran allows for various analyses considering pre-tensioned bolts (linear static analysis, nonlinear static analysis SOL601, linear buckling analysis, etc.). Using the Femap interface, modeling of bolt connections with beam elements, bar elements, and solid elements, as well as the setting of bolt loads, can be done easily. This case modeled the bolts using bar elements and solid elements and compared the results from both methods. Two fittings with a surface static friction coefficient of 0.15 were fastened with M10 bolts. An axial force of 150 kgf was applied, with one side fixed, and a linear static analysis was performed (Figure 1). The comparison of results from the bar elements and solid elements showed that the maximum and minimum Mises stress values and the maximum and minimum displacement values for the two fittings were the same for both methods. ● For more features and details, please download the catalog.

• Scientific Calculation and Simulation Software

【Case Overview】 ■Product Name: NX Nastran There has been an image that Super Elements (SE) are only applicable in the aerospace and automotive fields and can only be used by a limited number of analysis specialists. There has been no pre- and post-processing tool that fully supports SE analysis, and the data creation process has been complicated, which has hindered its widespread adoption until now. Femap has started to support external Super Elements for Nastran from version 11. In this case study, we will use an assembly model from the Femap example collection to demonstrate that SE analysis can be used by anyone with Femap v11.

• Scientific Calculation and Simulation Software

This is a collection of analysis examples including the stability (behavior) analysis of washing machines, the eigenvalue optimization analysis of magnetic heads, the frequency response analysis of traveling wave ultrasonic motors, and induction heating analysis, among others. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis cases.

• Scientific Calculation and Simulation Software

This is a collection of analysis examples including model analysis of railway vehicles, sloshing analysis of ships, airflow analysis within railway vehicles, large-scale finite element analysis of train vehicle dynamics, and hull strength analysis. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis case.

• Scientific Calculation and Simulation Software

This is a collection of analysis examples including seismic motion analysis of structures, wind analysis of high-rise buildings, analysis of liquid storage tanks subjected to earthquakes, natural frequency and frequency response analysis of reinforced concrete (SRC) structures, and acoustic analysis of audio rooms. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis cases.

• Scientific Calculation and Simulation Software

This is a collection of case studies on structural analysis, buckling analysis, thermal analysis, and more of mechanical elements. Additionally, there are analysis cases not included in the collection, so if you are interested in any specific analysis case, please feel free to contact us.

• Scientific Calculation and Simulation Software

This is a collection of analysis cases including shape optimization analysis, nonlinear transient analysis of brake rotors, pressure distribution analysis of brake pads, and behavior analysis of diaphragm springs through nonlinear static analysis. Additionally, there are analysis cases not included in the collection, so please contact us if you are interested in any specific analysis case.

• Scientific Calculation and Simulation Software

Femap is software that provides pre- and post-processing capabilities for finite element method (FEM) analysis running on Windows. It integrates a series of tasks from geometry creation/modification to finite element model creation and post-processing, offering an efficient and streamlined working environment. Additionally, it features interfaces compatible with numerous CAD data and solvers, allowing for a high degree of versatility and the ability to encompass CAE from a neutral standpoint, making it possible to serve as a central component of analysis solutions. The features available in Femap include: - Comprehensive CAD/analysis program interfaces - Fast generation of high-quality meshes - Efficient creation of finite element models - User interface focused on ease of use - Diverse and effective result display functions - Advanced customization capabilities

• Scientific Calculation and Simulation Software

It is ideal for the characteristics of the golf club head to match the characteristics of the golfer, allowing for maximum performance of its capabilities. In this case, the key indicator is the initial ball speed at impact. In this example, we determined the optimal face thickness and shaft stiffness that maximize the initial speed under defined loading conditions (average golfer's power) using optimization methods. We created a process using ModelCenter, an optimization support tool, to analyze the impact of face structure and shaft stiffness on initial speed. This enabled us to examine the influence of each parameter and seek the optimal golf club characteristics. For more detailed information, please refer to the catalog or contact us directly.

• Scientific Calculation and Simulation Software

**Case Summary** ■Product Name: NX Nastran ■Industry: Construction There are many structural forms for containers that store liquids and their supports. During an earthquake, the dynamic liquid pressure caused by sloshing of the liquid surface in the tank acts on the container's side walls and bottom plate, resulting in damage to the tank and rocking vibrations that can cause parts of the bottom plate to lift, leading to tank damage. This case study utilized the virtual fluid boundary and phantom elements of NX Nastran to perform transient response analysis on three types of tanks, as shown in the figure on the right, using the seismic waves from the 2011 Great East Japan Earthquake (M9). Below, we present the sloshing behavior during the earthquake and the distribution of dynamic liquid pressure. * Downloaded from K-NET For more detailed information, please refer to the catalog or contact us directly.

• Scientific Calculation and Simulation Software

【Case Summary】 ■Product Name: NX Nastran ■Industry: Architecture Using high-rigidity lightweight aluminum extrusion materials, various frame structures can be assembled. When designing these structures, it is necessary to investigate the deformations, stresses, and vibration characteristics that occur during use to ensure functionality and safety. In FEM analysis of frame structures, it is common to model them using beam elements; however, the cross-section of aluminum extrusion materials is complex, and traditional beam element outputs cannot display the characteristics of detailed sections. On the other hand, modeling thin-walled structures with solid elements is challenging, and creating high-quality meshes results in large models that require substantial computational resources and high-performance post-processing. This example introduces the applicability of Femap with NX Nastran for such analyses. ◎ For more detailed information, please refer to the catalog or contact us directly.

• Architectural CAD

**Case Summary** ■Product Name: NX Nastran ■Industry: Mechanical Components The super-element feature of NX Nastran reduces computational load by dividing large models for analysis or by reducing parts of the model (external super-elements) to create a smaller analysis model, thereby shortening computation time when changes are made to other parts. In this case, when designing the natural frequency of a fan blade, the non-changing boss section was reduced as an external super-element and analyzed in conjunction with the mesh model of the blade section to verify analysis accuracy and evaluate computation time reduction. This method saves computation time in cases where there are many repetitive calculations, such as performance evaluations during the design phase or countermeasure considerations at the component level, and the more unchanged parts there are, the more significant the benefits. Additionally, by converting in-house component models into super-elements and providing them to other companies, the shapes can be treated as black boxes, which can also be utilized for information security. □ For other features and details, please refer to the catalog.

• others

MADYN2000 is a finite element software developed by experts in bearings for coupled analysis of rotating bodies and bearings. It allows for smooth performance analysis of rotating bodies, optimization analysis of various parameters of bearings, and coupled analysis with active magnetic bearings and their PID control systems. The calculation of support stiffness for rolling bearings utilizes software and libraries from Swiss company MESYS AG. 【Features】 ⇒ User-friendly with a sophisticated Windows interface. ⇒ Easy model creation with copy and paste functionality for input data. ⇒ Smooth unit selection and conversion with unit assistance features. ⇒ Developed on the MATLAB platform, facilitating collaboration with experimental data processing. Executable analysis functions (rotating bodies: lateral and torsional vibrations) - Support load analysis - Complex eigenvalue analysis at rated speed - Frequency response and unbalance analysis - Transient response and speed-up analysis - Parameter variable analysis → Campbell diagram → Critical speed map → Sensitivity analysis of support stiffness and dampers → Sensitivity analysis of coupling stiffness

• Scientific Calculation and Simulation Software

【Features】 ◆ Load Creation and Management Easily create combinations of FEM loads, combinations of FEM analysis results, load groups, and load cycles, as well as cycle loads and proportional loads used for fatigue evaluation. ◆ Detection Tools Equipped with the ability to automatically detect complex structural elements such as frames, panels, plates, beam members, and joints, and calculate their dimensions. ◆ Standard Verification Capable of evaluating buckling of plates and beam structures, strength evaluation of tube structures, strength and buckling evaluation of frame structures such as cranes, and welding fatigue evaluation according to BS7608. ◆ Report Generation FEM analysis results, standard verification results, and contour diagrams can be directly incorporated into reports. There is a template function that allows for the reuse of a series of calculation processes. 【Application Examples】 ○ Evaluation of welding fatigue safety factors ○ Integrity evaluation of crane structural components against wind loads ○ Buckling evaluation of hull panels

• Crane and others

Our experienced engineers will respond appropriately. - There is no manpower or time to carry out analysis tasks. - We want to introduce CAE into our operations, so we would like support including training. - We are struggling with technical issues such as modeling and analysis methods. Please feel free to consult with us.

• Gutters and U-shaped gutters

【Case Overview】 ■Product Name: GLview Inova ■Analysis: Other ■Industry: Other Using the three-dimensional finite element method, we conducted a rockfall simulation. To clearly display the analysis results of rock masses collapsing while colliding with slopes, it is necessary to smoothly animate many analysis steps. GLview Inova enables smooth animation display, and by installing the free plugin (GLview 3D Plugin), it can be displayed as a three-dimensional model on a web page. Users can view the analysis results from any direction while running the animation. □For other features and details, please refer to the catalog.

• others

【Case Summary】 ■Product Name: OPTISHAPE-TS ■Analysis: Optimization Analysis ■Industry: Automotive In the case where compressive and tensile loads act on the connecting rod, we sought the shape that minimizes the equivalent stress while maintaining volume (mass). Additionally, we performed optimization with the condition that the elliptical deformation of the large end hole under tensile load is minimized, as well as optimization that maintains stress and displacement while minimizing volume. The analysis was conducted using a 1/2 model. □For other features and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

**Case Overview** ■Product Name: Femap Thermal ■Analysis: Thermal Analysis ■Industry: Other In this analysis example, a thermal radiation transfer analysis within a container composed of multiple radiation zones was conducted. In this case, the radiation zones consist of three areas: the interior of the container, which includes the heat source, heat receiving surface, and inner wall; the space between the inner and outer walls; and the area from the outer wall to the environment. The calculation of the form factor is known to take time due to the exhaustive pairwise calculations between element surfaces, resulting in a large matrix size. Femap Thermal utilizes the Hemicube method with OpenGL to process the time-consuming form factor calculations quickly. Additionally, with a dedicated interface for thermal analysis, it is easy to set up radiation settings even for models with multiple enclosures. □ For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

【Case Overview】 ■Product Name: Femap Thermal ■Analysis: Thermal Analysis ■Industry: Mechanical Components Modeling thermal connections between components can be challenging due to thermal resistance from contact and heat conduction at adhesive joints. By using the thermal coupling feature, it is possible to define conductive conductance, thermal conductivity, or thermal resistance values between distant meshes that do not share nodes, allowing for thermal coupling in calculations between these distant meshes. This is an excellent feature that automatically considers the positional relationships of elements and allocates the degree of thermal coupling for each element. In this analysis case, we will analyze the temperature distribution due to heat generation from a chip within a structure consisting of four types of components: chip, substrate, edge guide, and case. The adhesive between the chip and substrate, as well as the edge guide that connects the substrate and case, were modeled using thermal coupling. □ For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

**Case Overview** ■Product Name: Femap Thermal, Femap Flow ■Analysis: Thermal Fluid Analysis ■Industry: Automotive Femap Thermal/Flow is software for thermal fluid analysis that operates as a Femap application. It can be used with the same operational feel as Femap. Through the combination of Femap Thermal and Femap Flow for thermal fluid analysis, we calculated the flow of exhaust gases within the muffler and the temperature distribution of the muffler due to high-temperature exhaust. By using Femap Thermal and Femap Flow simultaneously, thermal fluid analysis can be conducted. It can solve complex problems such as heat transfer at the fluid-structure interface, fluid flow, thermal conduction in structures, and consideration of radiation at the surface of structures. In this case, we conducted thermal fluid analysis focused on the muffler. We confirmed that we could obtain necessary parameters for design by determining the temperature difference of exhaust gases at the inlet and outlet, the flow of exhaust gases within the muffler, and the temperature of the surface of the muffler structure. □ For other functions and details, please refer to the catalog.

• others

**Case Overview** ■Product Name: NX Nastran ■Analysis: Modal Analysis ■Industry: Railways and Shipping Since railway vehicles operate in a coupled manner, it is necessary to analyze the motion characteristics of the entire train when considering vehicle dynamics. To accurately predict the vibrations generated in various parts of the moving vehicle, a vehicle simulation using a finite element model (FEM) that closely resembles the actual structure, rather than a uniform beam or equivalent plate structure, is required. On the other hand, such analyses heavily depend on the computational environment, model creation, and result visualization capabilities, necessitating parallel computing solutions and efficient pre/post-processing software. This example involves creating the vehicle body using Femap and conducting a modal analysis of a 10-car train model with NX Nastran to determine the natural frequencies up to 20 Hz. Additionally, the application of FEMAP and GLView for post-processing large-scale finite element analyses will be introduced.

• others

**Case Overview** ■Product Name: NX Nastran ■Analysis: Nonlinear Static Analysis ■Industry: Mechanical Components Plastic processing primarily involves forming processes that include contact between tools and workpieces. Among these, the method of forming bottomed containers from metal sheets using a punch and die is called deep drawing. Various factors such as the structure and material of the mold, the shape of the blank, and friction conditions influence the process, resulting in changes in the stress distribution in different parts of the blank during forming, leading to issues like cracking and wrinkling. This analysis example introduces a deep drawing case of a rectangular box-shaped container. The initial shape of the blank is 200x200 with a thickness of 0.82mm. The die is a rigid flat plate with a square hole measuring 102.5x102.5 with rounded corners of 10mm radius. The punch is a rigid body with a size of 100x100 and has steps, and similarly, the wrinkle suppressor is also a rigid flat plate. □ For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

We will introduce a case study of analysis using NX Nastran, focusing on the vibration characteristics simulation of dental instruments - ultrasonic scalers.

• others

**Case Overview** ■Product Name: NX Nastran ■Analysis: Frequency Response Analysis ■Industry: Other In this analysis example, synchronous and asynchronous frequency analyses of a rotating body in a fixed coordinate system were conducted. The former is an analysis where the rotation speed and the excitation load frequency match, resulting in a response peak at the dangerous speed point on the 1P line in the Campbell diagram. The latter involves a rotor rotating at a constant speed with varying excitation load frequencies, leading to rotor resonance at the intersection points of each mode with the vertical line in the Campbell diagram. □ For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

【Case Overview】 ■Product Name: NX Nastran ■Analysis: Linear Transient Analysis ■Industry: Other Transient response analysis that calculates the vibration characteristics of the rotor when increasing the rotational speed and the behavior during passing through the critical speed can be performed in addition to synchronous and asynchronous analyses like frequency analysis. It is also possible to conduct analyses where the rotational speed is increased while keeping the rotational speed constant or the excitation frequency constant. This is an analysis along a point or a horizontal line in the Campbell diagram. □For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

**Case Summary** ■Product Name: NX Nastran ■Analysis: Eigenvalue Analysis ■Industry: Other The vibration characteristics of rotating bodies exhibit whirl motion due to centrifugal force, tilt vibrations, and gyroscopic effects as the axis rotates, causing changes in eigenvalues. When the direction of rotation and whirl coincide, it is referred to as forward whirl, and when they are opposite, it is called backward whirl. When the rotational speed matches the eigenvalue of the axis, the amplitude of the whirl increases, leading to instability in the rotating system and potential damage to components. The speed at this point is referred to as the critical speed. In this analysis, modal complex eigenvalue analysis was conducted for specified rotational speeds to investigate the whirl modes induced by rotation, changes in damping, and critical speeds. □ For other features and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

【Case Summary】 ■Product Name: NX Nastran ■Analysis: Modal Analysis, Linear Transient Analysis, Frequency Response Analysis ■Industry: Mechanical Components Stable operation is extremely important for various rotating machinery such as turbines, jet engines, generators, fluid equipment, and electrical products, and vibration prevention is an essential challenge. This example introduces the rotating system analysis capabilities of NX Nastran using a representative model of rotor dynamics. □For other features and details, please refer to the catalog.

• Prime movers, torque converters, hydraulic equipment, generators

【Case Overview】 ■Product Name: NX Nastran ■Analysis: Linear Static Analysis, Modal Analysis, Frequency Response Analysis ■Industry: Other A cantilever is a sensor that detects the interaction force between the probe and the sample in atomic force microscopy by measuring changes in displacement or resonance frequency. It is applied in fields such as precision machining and measurement of nanostructures. Since the detection sensitivity is determined by the mechanical properties of the cantilever, it is very important to determine those properties; however, the spring constant and resonance frequency of the cantilever can vary significantly depending on the vibrating environment. In this analysis example, we used the virtual fluid function of NX Nastran to investigate the changes in the natural frequency of the cantilever in a vacuum, in the atmosphere, and in water. □ For other functions and details, please refer to the catalog.

• Scientific Calculation and Simulation Software

【Case Overview】 ■Product Name: NX Nastran ■Analysis: Nonlinear Static Analysis ■Industry: Other Buckling is a deformation that exhibits very strong nonlinear characteristics. When buckling occurs, the strength and stiffness of the structure decrease sharply, leading to instability. Shell structures, like the one shown in the right diagram, are thin-walled and therefore have many local failure modes in addition to overall compressive buckling. During the buckling process, there is also contact within the shell itself. This analysis example presents the advanced nonlinear analysis results of NX Nastran for the nonlinear buckling problem of shell structures. □For other features and details, please refer to the catalog.

• Scientific Calculation and Simulation Software