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Application of Random Vibration Test Methods for Automotive Subsystems Using Power Spectral Density (PSD)
Technical Paper
2000-01-1331
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
SAE 2000 World Congress
Language:
English
Abstract
The object of this paper is to develop a random vibration laboratory test specification for automotive subsystems using the Power Spectral Density (PSD) method. This development is based on the 150k mile field data collected from vehicle proving grounds. The simulated vibration bench test will be used to simulate the energy of the 150k mile field data. The developed specification will include 3 axis random vibration profiles of appropriate duration.
The Power Spectral Density method converts the time-domain field data into the frequency-domain data. The Enveloped Energy method groups the similar road PSD profiles to produce a generic PSD profile. The Inverse Law allocates an adjusted duration to the desired PSD energy level. The Road Test Specification provides the duration time for the developed bench test. The n-Soft tool [1] is utilized for data reduction analysis.
The Bench Test Specification of the Fuel subsystem is a pilot for this development. Tri-axial accelerations are recorded at three locations near mounted constraints of the fuel subsystem on the body side. The validation for the development is the duplication of field damage on the fuel subsystem in the laboratory test.
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Citation
Lin, J. and Yim, K., "Application of Random Vibration Test Methods for Automotive Subsystems Using Power Spectral Density (PSD)," SAE Technical Paper 2000-01-1331, 2000, https://doi.org/10.4271/2000-01-1331.Also In
References
- “nSoft - User Manual,” Ncode International Ltd. Feb. 1998
- Newland D. E. “An Introduction to Random Vibration and Spectral Analysis” 2nd
- Clough Ray W. Penzien Joseph “Dynamics of Structures” McGraw Hill Inc. 1975
- Paz Mario “Structural Dynamics Theory and Computation” Van Nostrand Environmental Engineering Series 1979