说明：  1、本程序实现了车辆板簧装配过程和承载力计算的参数化分析 2、程序分为两个荷载步，荷载步1为板簧的装配，荷载步2为板簧的承载力计算
(1, this program implements the parametric analysis of the leaf spring assembly process and the calculation of the capacity of the vehicle 2, the program is divided into two loading steps, and the loading step 1 is the leaf spring assembly, and the load step 2 is the leaf spring bearing capacity calculation)