扭转梁悬架衬套安装角度与操稳性能协同优化  

Collaborative optimization of twist beam suspension bushing mounting angle and handling performance

作　　者：高晋[1] 牛子孺[1] 杨路[1] 杨秀建[1] 张昆[1] 

机构地区：[1]昆明理工大学交通工程学院,昆明650500

出　　处：《重庆大学学报（自然科学版）》2014年第7期33-45,共13页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(51005109)

摘　　要：为了研究扭转梁悬架衬套安装角度对悬架特性及操纵稳定性的影响,探明由衬套安装角度引起的悬架特性和整车操稳性能变化之间的内在联系,通过改变衬套安装角度实现整车操稳性能的提升,建立了扭转梁悬架刚柔耦合模型,利用DOE方法详细分析衬套安装角度在整车个设计空间对悬架特性的影响,并计算悬架K&C特性指标与衬套安装角度的非线性关系曲线,解决了在轮跳和侧向力作用时衬套安装角度与悬架重要特性指标的映射关系问题。在悬架分析基础上,求解衬套安装角度和操纵稳定性指标的非线性关系曲线,通过与K&C分析曲线对比,显示衬套安装角度对操纵稳定性和悬架K&C特性影响的明显的内在联系。最后,基于NSGA-Ⅱ多目标优化算法,以操稳性能为优化目标,实现了衬套安装角度和操稳性能指标的多目标协同优化,结果表明车辆的操稳性能得到了改善。To study the influence of twist beam suspension bushing mounting angle on suspension K＆C characteristics and handling, and investigate inherent relationship between suspension characteristics and full vehicle handling variety which is caused by bushing mounting angle, at same time realize better full vehicle handling performance,a rigid-flex model of twist beam suspension is built. The influence of bushing mounting angle concerning whole design space on suspension K＆C characteristics is analyzed explicitly. Nonlinear relationship curves between K＆C characteristics and mounting angle are gained. Mapping problems between suspension key characteristics index on wheel travel and lateral force condition and bushing mounting angle are solved. Based on the above suspension analysis, nonlinear relationship curves between handling index and bushing mounting angle are obtained. Comparing the nonlinear relationship curves with K＆C analysis curves shows that the influence of mounting angle on handling is obviously relevant with suspension K＆C. At last, handling index is taken as optimization object, and collaborative optimization on mounting angle and handling index is carried out with NSGA-ll muti-objective optimization algorithm. Results show vehicles have better handling performance.

关 键 词：悬架 衬套 优化 扭转梁 操纵稳定性 

分 类 号：U463.33[机械工程—车辆工程]