多项式非线性悬置刚度曲线法计算动力总成位移

Powertrain displacement calculation based on polynomial nonlinear mounting stiffness curve method

汽车动力总成悬置系统,对动力总成静态支撑和动态隔振起到关键作用,其中,系统设计需要模拟不同工况下动力总成质心位移,悬置的位移和受力。采用了多项式样条曲线方法定义悬置非线性刚度曲线,并分析推导了静态工况下悬置受力的方程;通过横置动力总成三点悬置案例,分别应用Matlab程序和Adams软件对悬置系统质心位移、悬置的位移和受力进行仿真、迭代计算。结果对比一致性很好,证明了方法的正确性。

The vehicle powertrain mounting system is key to the static support and dynamic isolation of the powertrain.During the design of the system,it is necessary to simulate the displacement of the powertrain and each mount under different working conditions.In this paper,the nonlinear stiffness curve of the mount is defined by the polynomial curve method,and the stress equation under static condition is deduced.By using Matlab and Adams software,the centroid displacement and stress of the three-point mounting system are simulated and iteratively calculated.The results show good consistency,which proves the correctness of the method.