汽车排气系统悬挂点位置的优化改进

为了探究排气系统更优的挂钩位置，对简化模型进行数值分析及理论研究。首先，对挂钩位置的确定进行理论分析并以某乘用车排气系统为研究对象建立有限元模型；其次，分别用平均驱动自由度方法和改进方法确定挂钩位置；最后，将两种方法确定的挂钩位置分别进行动力响应分析并得出结论。改进方法的计算及建模过程耗时更少，工作效率更高；同时，确定的挂钩位置更准确，使得挂钩的力响应更小，传递到车身的振动和结构噪声更不明显。

Hanger Point Location Optimization to Improve Automobile Exhaust System

In order to get a better location for the hanger of a exhaust system, this paper was focused on numerical analysis and theoretical research on the simplified model. Firstly, the hanger position was analyzed theoretically and a finite element model was established based on a passenger car. Secondly, the hanger position was determined with the methods of average driver DOF and improved method. Finally, the conclusion was obtained through force response of the two methods'results. It takes less time to calculate and establish a model with improved method, which is proved to be more efficient. Moreover, the location determined by improved method is more accurate, which has a less force response, less shock and less structural noise.