基于ADAMS的汽车平顺性建模与仿真分析

Modeling and Simulation Analysis of Ride Comfort based on ADAMS

以某SUV汽车为研究对象,运用机械系统多体动力学仿真软件ADAMS/Car建立了包括前后悬架、轮胎、车身和转向系等子系统在内的整车仿真模型;根据谐波叠加法建立B、C级随机输入路面,按照国家标准建立三角形凸块脉冲输入路面,并分别进行汽车平顺性仿真.通过计算随机输入下汽车总加权加速度均方根值和脉冲输入下车身最大垂向加速度,对汽车平顺性进行评价,研究了悬架弹簧刚度对汽车平顺性的影响.结果表明:B、C级随机输入路面下该车具有较好的平顺性,脉冲输入路面下对乘员的健康不会产生危害;降低悬架弹簧刚度可以改善汽车的行驶平顺性.

Using the mechanical system dynamics simulation of the ADAMS software,the multi-body system of car model is established in which suspensions,tires,vehicle body and steering system are considered.Establishing the B and C class and triangle pulse road,the car ride comfort is carried out under the different velocity and under the B class road the impact of suspension parameters on vehicle ride comfort is researched.By calculating the chassis vertical accelerations root-mean-square value of random input and the maximum vertical acceleration of the pulse input,the ride comfort is evaluated.The result shows that the car is suitable on the B and C class road;the pulse road does not harm the health of crew;reducing the suspension spring stiffness can improve the car ride comfort.