考虑驱动带的客车悬置系统振动分析及设计

Vibration Analysis and Design of Coach Mounting System of Considering Driving Belt

为了研究客车发动机前端驱动带对动力总成悬置系统振动特性和隔振设计的影响,建立了考虑驱动带的悬置系统模型,对悬置系统的固有特性进行了计算;通过对比不考虑驱动带模型的计算和驱动带刚度的设计研究,分析了驱动带对悬置系统振动特性的影响。以悬置安装位置和角度为设计变量建立优化设计模型,采用遗传算法对不考虑驱动带和考虑驱动带两种方式建立的模型进行优化设计,对优化结果进行了比较分析。此外,通过对动力总成施加发动机激励,对比研究两种建模方法优化前后振动响应的情况,表明考虑驱动带的模型在优化后悬置元件向车身的传递力响应最小,设计效果比不考虑驱动带要好。

In order to study the effect of front-end driving belt on vibration characteristics and vibration isolation design of powertrain mounting system,the mounting system model of considering drive belt was established.The influence of the driving belt on the vibration characteristics of the mounting system was analyzed.The optimal design model was established based on the mounting position and angle as the design variables,and the genetic algorithm was used to optimize the design of the regardless driving belt and considering drive belt.The optimization results were compared and analyzed.In addition,by applying the engine excitation to the powertrain,the vibration response of the two modeling methods before and after optimization was compared.It shows that after the optimization of the considering drive belt,the transmission force response of the mounts to the vehicle body is minimized,and the design effect is better than that regardless driving belt.