非平稳行驶条件下重型汽车轮胎动载特性分析

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摘要为分析非平稳行驶条件下重型汽车轮胎附加动载特性、探讨与匀速平稳行驶工况下的差异，基于车辆行驶动力学理论，建立三轴重型汽车系统动力学模型和路面非平稳随机激励时域模型，采用MATLAB/Simulink软件仿真分析了车辆非平稳行驶条件下轮胎动载的响应规律，并与匀速平稳行驶条件下的分析结果进行比较。结果表明：车辆加速时轮胎动载荷幅值变大、减速时动载荷幅值减小；车辆等时通过同一段道路时，匀速平稳行驶时的动载荷较小；随着加速度、初速度和路面不平度的增加，动载荷幅值变大。研究结果可为精确模拟车辆轮胎动载荷、道路友好性分析和路面损伤破坏预测提供参考。

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	李金辉1
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	徐立友1
	张柯柯2

关键词 ：车辆-路面系统动力学, 轮胎动载荷, 重型汽车, 非平稳行驶, 仿真分析

Abstract：In order to analyze additional tire dynamic load characteristics of heavy vehicles under non-stationary running condition, and explore the difference between the former and those under steady running condition, the dynamic model of a three axle heavy vehicle system and the road surface non-stationary random excitation time domain model were established based on the vehicle running dynamics theory. The vehicle response laws under non-stationary running condition and its tire dynamic load were simulated and analyzed with the software MATLAB/Simulink. The analysis results were compared with those under steady running condition. The results showed that when the vehicle is accelerating, tire dynamic load amplitude increases, when it is decelerating, the latter deceases; when the vehicle passing through the same path with the same time, i.e., when it running at the steady uniform speed, tire dynamic load is smaller; with increase in acceleration, initial speed and road roughness, tire dynamic load amplitude becomes larger; the study results can provide a reference for accurate vehicle tire dynamic load simulation, road friendliness analysis and pavement damage and failure prediction.

Key words： vehicle-road system dynamics tire dynamic load heavy vehicle non-stationary running simulation analysis

收稿日期: 2018-03-27 出版日期: 2019-12-28

引用本文:

李金辉1,2，徐立友1，张柯柯2. 非平稳行驶条件下重型汽车轮胎动载特性分析[J]. 振动与冲击, 2020, 39(1): 109-114.
LI Jinhui1,2, XU Liyou1, ZHANG Keke2. Tire dynamic load characteristics analysis of heavy vehicles under non-stationary running condition. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 109-114.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2020/V39/I1/109

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