弹簧阻尼单元，可用于有限元编程分析。仅供参考！-Spring-damper units, can be used for finite element analysis program. For reference only!

已知质量阻尼弹簧系统的运动微分方程，求系统何时达到稳定，并画出位移时间变化曲线-Known mass damper spring system equations of motion, seeking when the system reaches stability, and draw the displacement-time curve

解汽车人体座椅模型，解决弹簧阻尼振动模型(Solving spring damping vibration model)