Title: Comparison of random vibration responses between traditional model and coupled model for a road-rail fire fighting vehicle

Authors: Xiao-Wei Li; Jian-Wu Zhang; Tong-Li Lu

Addresses: State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong-Chuan Rd., Shanghai, China. ' State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong-Chuan Rd., Shanghai, China. ' State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dong-Chuan Rd., Shanghai, China

Abstract: Based on the vehicle-track coupled dynamics, a vehicle-track coupled model for the road-rail fire fighting vehicle is set up. The random vibration characteristics of the vehicle-track coupled model are compared with those of the traditional vehicle model regarding the track as a rigid foundation. Some field measures are done to verify the two models. The experimental test results and the numeral simulation results indicate that the traditional vehicle model is only fit to study the vibration performances of car body and low frequency vibration characteristics of wheel-rail, and very serious errors will be produced when researching high frequency vibrations. Whereas the vehicle-track coupled model can be suitable for investigating the random vibration features of the vehicle and the track within the whole frequency domain.

Keywords: road-rail fire fighting vehicles; vehicle-track coupled dynamics; traditional vehicle models; vehicle-track coupled models; random vibration; track irregularity; modelling; numeral simulation; car body vibration; low frequency vibration; wheel-rail vibration; vehicle vibration.

DOI: 10.1504/IJVNV.2011.042422

International Journal of Vehicle Noise and Vibration, 2011 Vol.7 No.3, pp.238 - 252

Available online: 10 Sep 2011 *

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