摩托车行驶平顺性的仿真分析与试验研究

摘要

The dynamic model of motorcycle for riding analysis on uneven road was built up,with the spring model of the vertical stiffness to replace the tire model,so as to simplify the modeling process,and the four degrees of freeform of multi-body dynamics model was established, including the bounce and pitch of the body and the bounce affront and rear wheel. Harmonic superposition method was used to establish the C grade road model,and it was later applied to multi-body dynamics model analysis and also to the road simulation test.In the road simulation test,with two channel tire coupling road simulation test machine for motorcycle system vibration,transforming the C grade road model into the drive signal of the vibrator,the vertical acceleration of the saddle and pedal position were measured-Compared with the test results,the multi-body dynamics simulation model was proved to be correct.%对含路面不平激励作用下的摩托车进行了行驶平顺性的动力学建模,用垂向刚度的弹簧模型代替轮胎模型,从而对建模过程进行简化,建立了车身垂向、俯仰及前后轮弹跳共四个自由度的多体动力学模型.运用谐波叠加法建立了C级路面模型,并将其同时应用到多体动力学模型仿真分析以及基于道路模拟的摩托车平顺性的试验测试中.在道路模拟的试验中,采用两通道轮胎耦合道路模拟试验机对摩托车系统进行激振,将C级路面模型转化为激振器的驱动信号,并对驾驶员坐垫和脚踏位置的振动加速度进行了测试,同时与仿真分析结果进行对比,验证了仿真模型的正确性.