机电工程技术2025，Vol.54Issue(11)：17-21,134,6.DOI:10.3969/j.issn.1009-9492.2025.11.004
某乘用车虚拟样机模型建立及动力学特性分析
Virtual Prototype Modeling and Dynamic Characterization of a Passenger Car
摘要
Abstract
Vehicle dynamics characterization,as an important part of vehicle reserch and design,directly affects key performance indicators such as occupant comfort,driving safety and fatigue life of key components.This study takes a passenger car as the research object and constructs a virtual prototype model of tire-pavement coupling based on multi-body system dynamics theory,which is used to carry out the analysis of vehicle dynamics.The simulation analysis covers three typical driving scenarios:pulse excitation condition,ramp driving condition and random road surface excitation,and the influence of different working condition parameters on vehicle dynamics is investigated by the control variable method.For the passenger cars studied,the results show that under the impulse input driving condition,a rectangular bump of the same height results in a vehicle vibration acceleration amplitude about 1.7 times that of a triangular bump,and the existing parameter matching scheme can effectively avoid human health risks.Under the ramp driving condition,every 1°increase in the ramp angle leads to an average increase in the amplitude of vertical vibration acceleration of about 0.4 m/s2,and every 100 kg increase in the load mass leads to an average attenuation of the amplitude of vertical vibration acceleration of about 6%.Under stochastic excitation,both vehicle speed and pavement smoothness are positively correlated with vibration acceleration amplitude,and the overall level of vertical vibration acceleration amplitude is higher compared to the lateral direction between vehicle travels.The results of this research provide a theoretical basis for vehicle design,and it is suggested that the dynamic response characteristics of extreme working conditions such as large slopes,bumpy roads and high speeds should be fully considered in the research and development stage,which is of some engineering application value for shortening the product development cycle and reducing the test cost.关键词
虚拟样机/脉冲输入/坡道行驶/随机激励/动力学特性Key words
virtual prototype/impulse input/ramp driving/stochastic excitation/dynamic characteristics分类
交通工程引用本文复制引用
黄冕,薛向尧,张文豹,王梦阳,王广义..某乘用车虚拟样机模型建立及动力学特性分析[J].机电工程技术,2025,54(11):17-21,134,6.基金项目
国家自然科学基金基础研究项目(SKLLIM2204) （SKLLIM2204）
