基于模块化建模的多轴车辆转向杆系优化

Optimization of steering linkage for multi-axle vehicle based on modular modeling method

针对多轴转向车辆轮胎磨损严重的问题,对其主要影响因素之一的转向杆系进行优化分析,提出了基于ADAMS软件的多轴转向杆系的模块化建模和优化方法。以五轴车辆为例,进行了建模和优化分析,首先通过对14个优化变量的灵敏度分析,确定7个优化变量。通过对比优化前后的结果可知,各轴的转角误差降低了（24.5~37.5）%。最后通过对整车虚拟样机模型的仿真和实车的试验测试,分析验证了转向杆系的受力合理性,进一步表明优化后的转向杆系具有较强的实践指导作用。

Tyre wear was a serious problem for multi-steering vehicle.Steering linkage of multi-alxe vehicle was one of the main influential facters for tyre wear.The modular modeling and optimization method of multi-axle steering linkage was brought forward based on ADAMS.Took a five-alxe vehicle for example,the model was built and optimized.Firstly,a sensitivity analysis was done for fourteen design variables and seven design variables were choose.Compare to the optimized and original results,the steering angular errors of every axle were reduced by（24.5~37.5）%.Finally,the full vehicle model was constructed and simulated.The real vehicle was tested and the rationality of steering linkage stress was verified.So it further indicated the optimized results of steering linkage had more practical guide.