TM1016V Free Vibration and Forced Vibration Experiment Device
We will conduct experiments on free vibration and forced vibration, vibration damping, and vibration isolation using a simply supported beam made of steel (tool steel) or a spring-supported beam. The experiments involve two types: a simply supported beam with a "pin support at the left end and a roller support at the right end," and a spring-supported beam with a "pin support at the left end and a spring support at the right end." In the forced vibration experiment, a vibrator located at the center of the beam rotates two flywheels with offset weights, generating vibrations in the beam. The mass of the vibrator can be varied by adding weights below it. In the free vibration experiment, the beam is manually struck to induce vibrations. Additionally, we can conduct damping experiments using oil dampers and free/forced vibration isolation experiments using vibration isolation devices. The rotation speed of the flywheel in the vibrator (Hz, rad/s, rev/min) is displayed digitally, and a displacement sensor installed beneath the beam measures the beam's amplitude and frequency (natural frequency). An accelerometer inside the vibrator is positioned at the same location as the displacement sensor, allowing for a comparative verification of the acceleration waveform obtained during the experiment and the function-processed waveform (theoretical value). A wide range of experiments can be conducted, including the effects of load changes on natural frequency, calculation of the damping ratio ζ due to damper damping, and vibration isolation experiments on simply supported beams.
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basic information
TM1016V Specifications Beam: Tool steel E=2.0x10^11Pa, L815 x D25 x t10mm Span distance: Simple supported beam span = 800mm, Spring supported beam span = 750mm Distance between pin support and vibration machine center = 400mm, Vibration machine width = 50mm Vibration machine: Variable speed motor drive, equipped with accelerometer Maximum speed: Approximately 17Hz (1020 rev.min^-1) Vibration machine mass: 4.2 kg, Offset weights 4.5g x 2, Additional weights 400g x 5, Weight holder 200g x 1 *Accelerometer is in the same position as the displacement sensor Spring constant: 3800 N.m^-1 Displacement sensor: 0.5M from pin support Damping damper: Mass 0.4kg (simple beam), 0.53 kg (rigid beam), Silicone oil viscosity 200 cSt Vibration isolation device: Spring steel (plated), Mass 445g, Additional weights 115g x 2 Dimensions & mass: W1280 x D450 x H800 mm, approximately 80kg Power supply: AC90V～250V 0.4A, 50/60Hz Noise: 70dB Accessories: Data automatic collection system (VDAS-B), Non-toxic silicone oil 500 ml
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Applications/Examples of results
Main Experimental Items Spring-supported beam (rigid beam) - Variable concentrated load experiment, damper damping experiment Simply supported beam - Variable concentrated load experiment, damper damping experiment, vibration isolation device installation experiment Natural frequency, insufficient damping, critical damping, over-damping, amplitude ratio β, phase lag α, damping ratio ζ, damping rate Delivery achievements: Universities, National Colleges of Technology, High Schools, etc.
Detailed information
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TM1016V Device Description Diagram
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Free Vibration of a Spring-Supported Beam - Theoretical Diagram
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Phase difference between displacement and function-processed velocity/acceleration reference graph.
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Theoretical Diagram of Free Vibration of a Spring-Supported Beam (Damped Oscillation)
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Vibration Damping Reference Graph
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Forced Vibration of a Spring-Supported Beam - Theoretical Diagram
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Amplitude Magnification Reference Graph
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Overview diagram of the phase lag of the vibrator.
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Vibration Isolation Device Theoretical Diagram
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Megakemu designs, manufactures, and imports various experimental and practical equipment for universities, junior colleges, technical colleges, high schools, and vocational schools nationwide. While the world has made advancements in various fields, it seems that our Earth's environment is being disturbed by ourselves and is approaching its limits. The world is seeking new Japanese technologies that coexist with the Earth's environment.
