某汽车空气弹簧的疲劳寿命分析
Fatigue Life Analysis of an Automobile Air Spring

建立空气弹簧的实体模型，并通过几何处理、网格划分、属性赋予等操作创建了空气弹簧的有限元模型，之后在Abaqus软件中对空气弹簧设置与实际相符合的边界条件，并选取其最大垂向位移工况进行静力学分析，通过静力学分析结果获得空气弹簧垂向的应力与应变的数据，对应力、应变数据进行整理并通过Origin软件进行绘图，得到其静刚度特性曲线。基于有限元仿真结果，在Fe-safe软件中结合软件自带的橡胶材料库，运用以开裂能理论为原理的疲劳分析方法对空气弹簧气囊进行疲劳寿命评估。分析求解结果中空气弹簧最容易受到破坏的位置，对空气弹簧的合理设计具有一定的指导意义。
The solid model of the air spring was established, and the finite element model of the air spring was created through geometric processing, meshing, attribute assignment and other operations, and then the boundary conditions of the air spring were set in the Abaqus software that matched the actual situation, and its maximum vertical displacement working condition was selected for static analysis. The strain data is collated and plotted by Origin software to obtain its static stiffness char-acteristic curve. Based on the finite element simulation results, the fatigue life of the air spring bladder was evaluated by using the fatigue analysis method based on the cracking energy theory in Fe-safe software combined with the rubber material library included in the software. The position of the gas spring that is most susceptible to damage in the analysis and solution results has a certain guiding significance for the reasonable design of the air spring.