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Case Study: Thermal Fluid Analysis of a Muffler

This is an introduction to the recommended software Femap Thermal/Flow for customers who are starting thermal fluid analysis with Femap.

**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.

Company：エヌ・エス・ティ
Price：Other

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[Example] Analysis of radiant heat transfer within a container

We conducted a heat transfer analysis of an internal radiation container composed of multiple radiation zones.

**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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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[Example] Rockfall and rock mass collapse simulation

The analysis results of the rockfall simulation using the 3D discrete element method were processed with GLview Inova.

【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.

Company：エヌ・エス・ティ
Price：Other

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Safety Standards Verification & Reporting Tool 'SDC Verifier'

You can perform everything from specification verification to report creation!!!

【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

Company：エヌ・エス・ティ
Price：1 million yen-5 million yen

Crane and others

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Rotating body and bearing coupled analysis software 'MADYN2000'

We lead in the analysis of rotating bodies using specialized software for fluid film bearings, magnetic bearings, and coupled analysis with bearings, as well as optimization CAE analysis techniques.

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

Company：エヌ・エス・ティ
Price：5 million yen-10 million yen

Scientific Calculation and Simulation Software

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[Example] Analysis of Aluminum Frame Structure

Automatically calculate beam cross-section performance from CAD data!!!

【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.

Company：エヌ・エス・ティ
Price：Other

Architectural CAD

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[Example] Vibration of liquid tanks and sloshing of liquid surfaces during an earthquake.

Case study using seismic waves from the Great East Japan Earthquake!!

**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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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Introduction to a general-purpose CAE pre/post-processor for finite element method analysis!

A comprehensive analysis solution with a main CAD and solver interface. Model creation and evaluation can be achieved with this single tool, and customization via API is also possible!

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

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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Automotive Analysis Case Studies

Collection of automotive-related analysis cases!! There are various examples, so please take a look.

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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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Collection of Examples Related to Electricity and Electronics

Collection of case studies related to electricity and electronics!! There are various examples, so please take a look!!!

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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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[Example] External Super Element 1

Reduction of analysis costs, enhancement of information security!!!

【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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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[Example] Linear static analysis considering initial bolt load

Linear static analysis using beam elements and bar elements for bolt connection parts!!!

**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.

Company：エヌ・エス・ティ
Price：Other

Scientific Calculation and Simulation Software

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Automated reading of exam results for 'visual observation/written by hand' → Immediate issuance of report cards

Because it is software from a testing equipment manufacturer, we understand the "test content" and "mechanism of the testing equipment," allowing us to respond flexibly to customer specifications.

▼Automation Points for Reading at Yonezawa Manufacturing▼ ▮Immediate Digitalization of Test Results By introducing software, handwritten or manually entered test results can be automatically read, allowing data to be imported from the testing machine*. Recording for each test specimen becomes easier, and real-time graphing is also possible. *Please confirm that there is no external output such as voltage from the testing machine. ▮Customization of Recorded Data and Input Items Management data can be customized according to your requirements. You can increase the number of optional input items and confirmation checks, allowing for better management of required data on the computer screen. Test reports utilizing this data can be issued immediately, and it is also possible to change the input and output items according to other information that needs to be output. ▮Simultaneous Automatic Recording of Other Tests and Conditions Temperature and humidity during testing, as well as outputs from digital gauges and calipers, can be recorded on the computer simultaneously, eliminating the hassle of "checking and recording." With this feature, you can simply press the start button for the test, and other information can be easily recorded, contributing to a reduction in labor.

Company：米倉製作所
Price：Other

Surveying
Other measuring instruments

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