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Load spectrum compilation for vehicle road simulation test by applying a new time domain threshold editing method

Load spectrum compilation for vehicle road simulation test by applying a new time domain... Vehicle road simulation test can simulate random service load spectrum fairly well in laboratory, and is currently a preferable way to fast verify vehicle fatigue properties. Applying a reasonable load spectrum editing technique is a crucial way to accelerate the test and reduce testing time and costs. The present study deals with the generation of test load spectrum for vehicle road simulation test by applying a load spectrum two-dimension time-domain-threshold editing method (STTE) to delete useless load-time segments with negligible fatigue damage to vehicle components. Additionally, a method of load spectrum connection by applying window function was proposed to smoothly connect retained load-time segments when the useless segments were deleted. Taking a vehicle four-post bench test as an example, the process of load spectra generation was discussed in detail. The generated accelerated spectra were reduced to 33% in length relative to the original spectra. The accelerated spectra showed good consistency with the original spectra in terms of amplitude and frequency characteristics. Finally, the accelerated spectra were applied as target spectra to conduct four-post bench test, and good load spectra simulation effect was realized. Therefore, the accelerated spectra can be served as a substitute of the original spectra to conduct the test. To conclude, the proposed load spectra generation methods are suggested as an alternative technique in automotive fatigue data editing. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering SAGE

Load spectrum compilation for vehicle road simulation test by applying a new time domain threshold editing method

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References (26)

Publisher
SAGE
Copyright
© IMechE 2022
ISSN
0954-4070
eISSN
2041-2991
DOI
10.1177/09544070221118442
Publisher site
See Article on Publisher Site

Abstract

Vehicle road simulation test can simulate random service load spectrum fairly well in laboratory, and is currently a preferable way to fast verify vehicle fatigue properties. Applying a reasonable load spectrum editing technique is a crucial way to accelerate the test and reduce testing time and costs. The present study deals with the generation of test load spectrum for vehicle road simulation test by applying a load spectrum two-dimension time-domain-threshold editing method (STTE) to delete useless load-time segments with negligible fatigue damage to vehicle components. Additionally, a method of load spectrum connection by applying window function was proposed to smoothly connect retained load-time segments when the useless segments were deleted. Taking a vehicle four-post bench test as an example, the process of load spectra generation was discussed in detail. The generated accelerated spectra were reduced to 33% in length relative to the original spectra. The accelerated spectra showed good consistency with the original spectra in terms of amplitude and frequency characteristics. Finally, the accelerated spectra were applied as target spectra to conduct four-post bench test, and good load spectra simulation effect was realized. Therefore, the accelerated spectra can be served as a substitute of the original spectra to conduct the test. To conclude, the proposed load spectra generation methods are suggested as an alternative technique in automotive fatigue data editing.

Journal

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering – SAGE

Published: Jan 1, 2024

Keywords: Road simulation test; load spectrum compilation; accelerated durability test; fatigue data editing; small amplitude load

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