半拖曳臂悬架设计与性能分析优化

Design and performance analysis and optimization of semi-trailing arm suspension

在底盘平台化开发中,为兼顾车辆舒适性和承载性,同时考虑驱动和布置空间,需要设计一套满足多种性能需求的半拖曳臂悬架系统。该悬架系统能够提供高承载,减小后悬架垂向布置空间,优化车辆操纵稳定性和平顺性能,兼顾MPV车型对舒适性的需求和VAN类车型对高承载和操稳性能的需求。基于此,首先分析半拖曳臂悬架关键点,优化硬点布置和拖曳臂关键尺寸,以在平台悬架的设计过程中折中通用化设计,然后进行动力学理论推导和弹性原件的匹配计算,最后通过动力学模型进行悬架运动学性能对比分析和验证。结果表明,开发的半拖曳臂悬架是一套高承载、空间小、舒适性好和操纵稳定性优越的悬架系统。

In the development of chassis platformization,in order to balance vehicle comfort and load capacity,while considering driving and layout space,it was necessary to design a semi-trailing arm suspension system that meets various performance requirements.This suspension system could provide high load capacity,reduce the vertical layout space of the rear suspension,optimize vehicle handling and ride,and balance the comfort requirements of MPV type of vehicles and the high loading and handling performance requirements of VAN type of vehicles.The key points of the semi-trailing arm suspension were first analyzed,the layout of the hardpoints and the key dimensions of the semi-trailing arm were optimized to compromise the universal design in the design process of the platform suspension,then the dynamic theory derivation and the matched calculation of the elastic components were conducted,and finally the comparative analysis and verification of the suspension kinematics performance were carried out through the dynamic model.The results indicated that,the developed semi-trailing arm suspension was a suspension system with higher load,smaller space,better ride performance,and superior handling.