汽车动力总成悬置系统的优化设计和鲁棒性分析

Optimal Design and Robust Analysis for Vehicle Power-train Mount

对某型动力总成悬置系统隔振性能进行了优化.以悬置系统的能量解耦为优化目标,利用多目标优化方法对悬置系统刚度进行优化设计.以信噪比为统计量,利用蒙特卡罗法对优化结果进行鲁棒性分析.计算结果表明,优化后的解耦性比原系统有显著的提高,主振动方向基本完全解耦,且具有很好的鲁棒性能,能够满足实际应用的需要.

In order to improve isolating performance of the power-train mount system of some vehicle, an optimal design is made for mount＇ s stiffness by multi-target optimization method, in which uncoupling of the energy is the objective function. With the signal to noise ratio as statistics, the robust analysis for the optimal result is done with Monte Carlo method. To compare with the original system, the result through the calculating testing shows that uncoupling of the power-train mount system with the optimal design has been improved significantly. The basic directions of the main vibration have completely decoupled. In ad- dition, it has a good robust performance satisfying the real application.