基于模拟退火算法的全地形车发动机悬置系统参数优化

建立了全地形车发动机悬置系统多体动力学模型，利用Matlab编程分析了该悬置系统各阶固有频率和模态能量解耦情况，发现对全地形车整车振动影像最大的Z向能量解耦率仅有73．11％；采用模拟退火算法，以能量解耦为目标，以各阶模态能量百分比占优方向上的能量解耦率最大为目标函数，以悬置元件的三向刚度为优化设计目标，建立了Isight集成Matlab优化模型；优化结果表明：优化前后固有频率变化很小，但z向解耦率大幅提高到96．87％，非常有利于全地形车整车振动控制。

The Parameter Optimization of ATV's Engine Mounting System Based on Simulated Annealing Algorithm

The muhi-body dynamics model of all-terrain vehicle＇ s engine mounting system was estab- lished, order natural frequencies and mode energy decoupling was analyzed using Maflab, and the results show that the energy decoupling rate is only 73.11% of direction Z which affect the vibration largely of the whole all-terrain vehicle. With Simulated Annealing Algorithm, the Isight integrated Matlab optimization model were established by using the energy decoupling as target, the energy decoupling rate on each modal energy percentage dominant direction as the objective function and the three direction stiffnessas of mount- ing as the design goals. The optimization results show that before and after optimization natural frequency changes very little, but the energy decoupling rate of direction Z significantly increased to 96.87% which is very conducive to the all-terrain-vehicle vibration control.