Automotive-related testing equipment Experimental modal analysis/acoustic analysis software ME’scopeVES
A and Day Co., Ltd.
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About This Product
Vibration/acoustic phenomena of machines and structures can be easily analyzed using data measurement using CompactWCA and WCAmini and analysis processing using ME’scopeVES.
■Actual operation analysis
・It is possible to visually animate the actual operating status of structures and surfaces based on data measured with CompactWCA and WCAmini.
- Time animation, frequency animation, and order animation are available to understand the actual operating status.
・Actual operation analysis simply measures and analyzes the response of the test specimen under actual operation conditions.
・It is often used in cases where it is difficult to measure the response by applying an excitation force to the test specimen, but it is possible to easily understand the deformation pattern (bending, twisting, etc.) of the test specimen, so experimental modal analysis is used. It is also effective as an introductory tool for those starting out.
■Experimental modal analysis
・It is possible to identify the natural frequency (mode frequency), damping ratio, and mode shape of a structure based on data measured with CompactWCA and WCAmini.
・Experimental modal analysis applies an excitation force to the test specimen and measures its response, and determines the dynamic characteristics (natural frequency, damping ratio, mode shape) of the machine/structure from the transfer function data of the response to the excitation force. Masu.
- From the mode shape, you can understand the different deformation patterns (bending, twisting, etc.) for each natural frequency.
・The damping ratio can be used to determine the time it takes for a machine or structure to come to rest after an external force is removed.
- Understanding dynamic characteristics is useful for product development, such as troubleshooting to narrow down the root cause of vibration problems, correlating analysis results with numerical analysis results, and utilizing them for optimal design.
■Acoustic analysis
It is possible to determine the sound intensity, sound pressure level (SPL), and sound power based on the data measured with CompactWCA and WCAmini, and effectively display the relationship between the surface vibration of machines and structures and acoustic data. . Additionally, it is possible to verify vibro-acoustic problems by simultaneously animating vibration and acoustic data.
■Transfer function measurement and experimental modal analysis using impulse excitation method
One experimental modal analysis method that has a relatively simple system configuration and is easy to perform is to apply an excitation force to the object to be measured using an impulse hammer and measure the excitation signal and response signal at that time.
The force sensor at the tip of the impulse hammer measures the excitation force, and the acceleration sensor measures the response signal. By importing these signals into an FFT analyzer, it is possible to obtain the transfer function that represents the response characteristics of the structure at each frequency. In addition, by importing the measured transfer function into modal analysis software, it is possible to compare it with the characteristics obtained from theoretical value analysis such as FEM, and to check the movement of the structure during resonance through animation.
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Automotive-related testing equipment Experimental modal analysis/acoustic analysis software ME’scopeVES
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