微型电脑应用

为了研究汽车发动机连杆在不同工况下的受力情况，避免产生疲劳裂纹，从分析发动机的运动过程及连杆机构的受力情况入手，基于ANSYS软件生产连杆的模态柔性体，构建刚柔耦合动力学模型，基于有限元分析法构建静态应力分析模型分析局部应力集中现象。根据雨流计算法从载荷谱统计出幅值个数，叠加其对应的应力值计算连杆的疲劳寿命，分析结果得出，发动机转速为3 000 r/min时最容易发生疲劳损伤。研究成果具有极大的实用价值。

In order to study the force of the automobile engine connecting rod under different conditions, avoid fatigue crack, this paper analyzes the movement process of the engine and force of the linkage of the modal based on ANSYS software, and builds the coupled dynamics model. In view of the local stress concentration phenomenon, a static stress analysis model is established by finite element method. According to the rain flow calculation method, the load spectrum number is obtained, superposition of its corresponding stress value is added to calculate the fatigue life of connecting rod. It is concluded that the engine with 3 000 r/min is most prone to fatigue damage. The conclusion has a great practical value.