【作者】 何延俊；

【导师】 唐应时；

【作者基本信息】 湖南大学 ， 车辆工程， 2004， 硕士

【摘要】 本文从系统仿真的角度对类菱形新概念电动汽车样车的单纵臂横扭杆独立悬架驱动桥进行了研究。 本文首先简要介绍了汽车悬架系统的基本组成，并重点介绍悬架运动学和弹性运动学对整车性能的影响、系统仿真技术的基本原理、系统仿真软件ADAMS的使用和悬架设计过程中主要性能参数的确定方法。 针对新概念电动汽车样车的单纵臂横扭杆独立悬架，本文计算了它的偏频、线刚度、侧倾角刚度、侧倾中心位置、纵倾中心位置；使用UG软件建立了该悬架的三维模型；使用ADAMS软件建立了悬架的仿真模型，包括多刚体模型和刚柔耦合模型；对多刚体模型进行仿真，研究悬架的弹性特性，发现设计方案中存在的问题——悬架结构左右不对称导致左右轮胎负荷略有不同；针对样车纵摆臂刚性差，容易变形，导致车轮发生大角度内倾的情况，进行纵摆臂的改进，并制造出样件，另外在垂直载荷、侧向载荷、纵向载荷工况下对考虑纵摆臂弹性的刚柔耦合模型进行仿真，研究纵摆臂弹性变形对车轮定位参数的影响，验证了纵摆臂的改进方案是可行的。 在论文中提出该悬架的横向稳定系统的设计方案，计算了横向稳定杆的扭转刚度、悬架在横向稳定杆作用时的侧倾角刚度，完成了该悬架设计理论计算的最后一步任务。更多还原

【Abstract】 In this paper,from the view of system simulation,the independent suspension drive axle with a single trailing arm and two transversal torsion bars which is used in the prototype of rhombic new conceptual eleetic vehicle was researched.In this paper.the basic components of automotive suspension system were briefly introduced.The influence that the suspension kinematics and elastic kinematics act on the automotive performance was emphasized discussed. The basic principles of system simulation and ADAMS,the system simulation software were presented.The methods to decide the main performance parameters of a suspension were recommended.For this independent suspension with a single trailing arm and two transversal torsion bars,this paper calculated its partial frequency,vertical stiffness,roll stiffness,the positions of roll center and pitch center.Its 3D model was built through using UG software.Its simulation model was built by ADAMS software,including multi-rigid-body dynamic model and flexible multi-body dynamic model.Through simulating the multi-rigid-body dynamic model,this suspension’s elastic property was researched,and the problem in design scheme was found,which was that the asymmetry of this suspension’s left and right side structure resulted in the difference of left and right tire load.For the reason of that the trailing arm’s lack of rigidity resulted in its large deformation and large negative camber angle,this trailing arm’s improved scheme was presented.and its flexible multi-body dynamic model was simulated in vertical load ,lateral load.longitudinal load working conditions,then the influence that the trailing arm’s deformation acted on the wheel’s orientation parameters was gained and validated that the trailing arm’s improved scheme was feasible.In this paper,the design scheme of anti-roll stabilizer was presented.The torsion stiffness of anti-roll bar,the suspension’s roll stiffness at this stabilizer working were calculated.This was the last task of this suspension design and theoretical computation.更多还原