基于虚拟样机技术的汽车平顺性研究.pdf

2009全国仿真技术学术会议论文集基于虚拟样机技术的汽车平顺性研究黄志刚,邹丹,朱慧,王晶(北京工商大学机械工程学院,北京100048) 摘要:依据多体动力学理论,基于虚拟样机技术建立某型号汽车九十七自由度的整车样机模型。针对平顺性仿真中的车辆跑偏问题提出了解决思路,生成了符合ADAMS轮胎模型要求的不同等级的路面文件。以随机路谱作为系统输入,根据汽车平顺性的评价标准。进行了不同路面等级的随机输入平顺性仿真,研究了不同速度、不同路面等级对车辆平顺性的影响, 输出了加速度性能曲线,得出系统的总加权加速度值,根据加权加速度值对车辆的平顺性进行评价,得出车辆的行驶速度和路面等级对车辆的行驶平顺性有影响的结论。还进行了道路试验,采集了道路试验数据,对数据进行了分析。并与仿真试验曲线进行了对比研究,验证了所建模型是正确的。关键词:多体动力学;虚拟样机;平顺性;仿真中图分类号: 文献标识码:A AStudy ofVehicle fort Based on Virtual Prototype HUANG Zhi—gang,ZOU Dan,ZHU Hui,WANG Jing (College Mechanical Engineering,Beijng Technology and Business University,Beijing 100048,China) ABSTRACT:Based on themulti—body dynamics virtualprototype—based 97 DOF vehicle model wag new idea proposed which aimed resolving theproblem ofhow keep thevehicle run grade road surface Welt屯builrt accordance稍tIl therequirement oftheADAMS/C盯tyre themodel based on theADAMS/Car software WaScarried outunder random theGBevaluatedstandard,different simulations were carried out along with road grade and different run ve- resultofthesimulation wa$showed by different differentcoefficients theX—axis,Y—axis and Z—axis,total weighted acceleration value was gotten,by which fort resultofthesimulation showed elerationchanged with thevelocity ofthevehicleand the grade oftheroad。and alsopmvad thatlower