汽车五连杆后悬架机械运动分析及DMU仿真

Mechanical Motion Analysis and DMU Simulation of Automotive Five-link Rear Suspension

文章介绍了汽车底盘五连杆后悬架的结构、机械运动原理、悬架运动建模和电子样机(DMU)模型应用,从理论角度分析汽车五连杆后悬架的机械运动原理、计算构件数量、计算运动副数量、计算空间自由度。研究了CATIA DMU运动学建模过程,包括输入参数、创建零件、创建约束、创建驱动仿真,并用悬架DMU模型解决汽车底盘设计的实际问题,包括校核各运动件间隙预防零件碰撞干涉,制作轮胎运动包络支持车身造型设计,输出车轮位移和外倾角关系图,判断车辆是否具备优异的运动学特性,输出车轮前束角和外倾角调节范围,得到轮心、弹簧、减振器的三者运动的杠杆比,计算悬架零部件的载荷支持悬架设计。研究成果在汽车设计领域具有较广泛的应用价值。

This article introduced the structure,mechanical motion principle,suspension motion modeling,and digital mock-up(DMU)model application of the automotive chassis five-link rear suspension.This article analyzed the mechanical motion principle of the automotive five-link rear suspension from a theoretical point of view,calculated the number of components,calculated the number of motion pairs,and calculated the degree of freedom of space.This article detailed the CATIA DMU kinematic modeling process,including input parameters,creating parts,creating constraints,and creating drive simulations.This article used the suspension DMU model to solve the practical problems of automotive chassis design,including checking the clearance of each moving part to prevent part collision interference.Make tire sports envelopes to support body styling.Output the wheel displacement and camber relationship diagram to determine whether the vehicle had excellent kinematic characteristics.Output wheel toe angle and camber adjustment range.Obtain the lever ratio of the movement of the wheel center,spring,and shock absorber,and calculate the load of the suspension part to support the suspension design.This article has a wide application value in the field of automotive design.