考虑制动力影响的人-车-路耦合振动

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Jie Zhang, Guichun Wang, Jiexuan Hu
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引用次数: 0

摘要

车辆在道路上行驶的乘坐舒适性一直是人们关注的问题。此外,车辆的制动力会加剧路面结构的损坏,降低驾乘人员的舒适度。本研究通过建立考虑制动力的人-车-路耦合振动系统,研究了路面的动态响应、道路友好性和人体舒适度。首先,建立了层间接触的沥青路面三维有限元模型和多自由度(2n + 7)的人-车模型,分析了不同制动条件下沥青路面、人体和客车的动态响应。然后,研究了不同组合条件下车轮的动载荷系数,以评价路面友好性,并采用人体烦扰率来评价人体舒适度。结果表明,对于沥青路面,由于公交车制动,路面的剪应力大于法向应力,路面粗糙度和制动力对路面友好性的综合影响最大。在人体舒适度方面,公交车制动时人体俯仰加速度的增加大于滚动加速度的增加,导致人体舒适度降低,烦扰率增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Human-bus-road coupled vibration considering effect of braking forces
The ride comfort of vehicles traveling on the road has always been a concern. In addition, the braking force of vehicles will aggravate the damage to road structures and reduce the comfort of drivers and passengers. In the present study, the dynamic response of pavement, road friendliness, and human comfort are investigated by setting up the human-bus-road coupled vibration system considering the braking forces. Firstly, the three-dimensional finite element model of asphalt pavement with interlayer contact and the human-bus model with multiple degrees of freedom (2n + 7) were established to analyze the dynamic responses of asphalt pavement, human body, and bus under different braking conditions. Then, the dynamic load coefficients of wheels under different combined conditions were investigated to evaluate the road friendliness and the human annoyance rate was adopted to evaluate the human comfort. The results show that for the asphalt pavement, the shear stress of the pavement is larger than the normal stress due to the bus braking, and the combined effect of road surface roughness and braking force on the road friendliness is the largest. For the human comfort, the pitch acceleration of human body increases more than the roll acceleration due to bus braking, resulting in the decreased human comfort and increased annoyance rate.
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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