吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (4): 738-744.doi: 10.13229/j.cnki.jdxbgxb20200942

• 车辆工程·机械工程 • 上一篇    

汽车非平稳随机振动空间域虚拟激励法及应用

李杰(),陈涛,郭文翠,赵旗   

  1. 吉林大学 汽车仿真与控制国家重点实验室，长春 130022
  • 收稿日期:2020-12-09 出版日期:2022-04-01 发布日期:2022-04-20
  • 作者简介:李杰（1964-），男，教授，博士生导师. 研究方向：汽车仿真与控制. E-mail： lj@jlu.edu.cn
  • 基金资助:
    汽车仿真与控制国家重点实验室自由探索项目(Ascl-zytsxm-202001);吉林省省校共建计划专项项目(SXGJSF2017-2-1-1);中国汽车产业创新发展联合基金重点项目(U1564213)

Pseudo excitation method of vehicle non-stationary random vibration in space domain and its application

Jie LI(),Tao CHEN,Wen-cui GUO,Qi ZHAO   

  1. State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China
  • Received:2020-12-09 Online:2022-04-01 Published:2022-04-20

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摘要：

总结和分析了平稳随机振动时间域虚拟激励法，建立了非平稳随机振动空间域虚拟激励法。借助于变量及其导数的时间域和空间域转换关系，由时间域汽车振动模型推导得到空间域汽车振动模型，建立了汽车振动和时间域加速度的空间频率响应特性。采用汽车振动两自由度单轮模型，建立了虚拟路面不平度、虚拟振动响应量和振动响应量统计特性的表示。选取某汽车参数和一种典型行驶工况，分析了振动响应量统计特性的变化规律。结果表明，本文方法适于求解汽车非平稳随机振动响应量的统计特性。

关键词: 车辆工程, 非平稳随机振动, 虚拟激励法, 空间域, 空间频率响应特性

Abstract:

Pseudo excitation method of stationary random vibration in time domain is summarized and analyzed， the pseudo excitation method of non-stationary random vibration in space domain is established. Based on the transformation relationship of variables and their derivatives between time domain and space domain， the vehicle vibration model in space domain is derived from the vehicle vibration model in time domain， and the spatial frequency response characteristics of vehicle vibration and acceleration in time domain are built. According to the two degree of freedom single wheel model of vehicle vibration， the expressions of virtual road roughness， virtual vibration response variables and statistical characteristics of vibration response variables are determined. The parameters of a car and a typical driving condition are used to analyze the variation law of statistical characteristics of vibration response variables. The results show that the method presented is suitable for solving the statistical characteristics of the vehicle non-stationary random vibration response variables.

Key words: vehicle engineering, non-stationary random vibration, pseudo excitation method, space domain, spatial frequency response characteristics

中图分类号: 

  • U461.4

图1

汽车振动两自由度单轮力学模型"

图2

典型行驶工况的速度"

图3

振动响应量的非平稳功率谱密度"

图4

振动响应量的非平稳均方根值"

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