将悬置简化为沿其 3 个弹性主轴方向具有非线性力与位移关系的元件，针对动 力总成 － 副车架悬置系统建立了一个 12 自由度计算模型。利用建立的模型计算了一电 动汽车上动力总成 － 副车架悬置系统的刚体模态和能量分布，以及一种极限载荷下的动 力总成质心位移、副车架质心位移、悬置位移和悬置载荷。通过 ADAMS 模型验证了所提 出的计算模型的正确性。文中模型为刚体模态优化和悬置力 － 位移特性设计提供了方法。

A new 12 DOFs ( Degrees of Freedom) calculation model for the powertrain-subframe mounting system was established by reducing the mount into three-dimension springs with the nonlinear force and displacement relation． Then the rigid mode and energy distribution，the displacements of the powertrain's CG，the displacements of the subframe's CG，and the displacements and loads of the mounts in the powertrain-subframe mounting system of an electrical vehicle under the ultimate load were calculated． The theoretical calculation model was verified by ADAMS model． The calculation model provides methods for rigid mode optimization and the design of mounting force-displacement control in powertrain-subframe mounting system．