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On Body Mount Crash Characteristics
Technical Paper
1999-01-3186
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper reports a study of the impact dynamic characteristics of body mounts in a body-on-frame vehicle. Two methods of dynamic analyses are utilized. One method is direct impact; and the other excitation on the body mount. Using a series of component test data, the direct impact method yields the natural frequency, f, and damping factor, ζ, for a spring-mass-damper model of a body mount. The functional relationship between the g-force versus deflection curve and f, ζ, and v (impact speed) is examined. Given a frame impulse, the excitation method predicts the body response by the convolution integral. The transient transmissibility (TT), the ability of a body mount to transmit shock impulse from the frame to the body in the early part of crash duration, is investigated. The degree of front-loadedness on the body pulse is determined by TT and thus it affects the occupant/vehicle crash response.
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Citation
Huang, M., "On Body Mount Crash Characteristics," SAE Technical Paper 1999-01-3186, 1999, https://doi.org/10.4271/1999-01-3186.Also In
References
- Miller Michael P. II Lee J.C. Krishna Murthy R. Cheng James Role of the Body Mount on the Passenger Compartment Response of a Frame/Body Structured Vehicle in Frontal Crash SAE 980861
- Eppinger H. Chan Han Sun Thoracic Injury Prediction Via Digital Convolution SAE # 811010 , 25 th Stapp Car Crash Conference San Francisco, California September, 1981
- Huang Matthew Lawson G.P. Powell B.K. Walker J.H. Characterization of Vehicle Deceleration Time Histories in the Analysis of Impact Dynamics SAE 770013 , Int’l Automotive Engineering Congress and Exposition Detroit Feb. 28-March 4, 1977