Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (11): 105-111.doi: 10.3969/j.issn.1000-565X.2015.11.015

• Automotive Engineering • Previous Articles     Next Articles

Ride comfort study of 6×4 commercial vehicle considering frame flexible

Kim Kyongil1  Guo Rui1  Zheng Ling-ling1  Guan Hsin1  Jong Chanhyok2   

  1. 1． State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，Jilin，China; 2． College of Mechanical Science and Engineering，Jilin University，Changchun 130022，Jilin，China
  • Received:2015-02-11 Revised:2015-04-27 Online:2015-11-25 Published:2015-10-01
  • Contact: 郭睿(1978-)，女，讲师，主要从事车辆系统动力学及车辆动态模拟仿真研究． E-mail:guor@ jlu.edu.cn
  • About author:金耿日(1979-)，男，博士生，主要从事车辆系统动力学与控制研究． E-mail: kimkyongil@163.com
  • Supported by:
    Supported by the Program for Changjiang Scholars and Innovative Ｒesearch Team in University of Ministry of Education of China(IRT0626)

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Abstract: In order to predict the ride comfort and optimize the design scheme during the initial design stage，a
half car vibration model of 6 ×4 commercial vehicles is constructed by taking into account the frame flexibility，and random input running tests are simulated． Next，the influences of vehicle suspension，cab suspension，engine mount and seat suspension on the ride comfort are analyzed． Then，a frame bending model is constructed by means of the assumed mode method，and the influence of the frame flexibility on the ride comfort of a whole vehicle is revealed． Furthermore，the influence of main vehicle parameters on the ride comfort is also evaluated through sensitivity analysis． Finally，the optimal matching of primary suspension and secondary one is processed by using the particle swarm optimization (PSO) algorithm． Simulation results show that both the stiffness of the first axle suspension and the first bending vibration of frame greatly affect the ride comfort，and the cab suspension and the seat suspension contribute most to the ride comfort．

Key words: automotive engineering, commercial vehicle, ride comfort, assumed mode method, frame flexibility

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