基于ANSYS的可调行程液压缸的活塞杆有限元分析及优化

Finite Element Analysis and Optimization of Piston Rod of Hydraulic Cylinder with Adjustable Stroke Based on ANSYS

以可调行程液压缸的活塞杆为研究对象,针对其结构特点对液压缸整体性能的影响,利用ANSYS软件建立活塞杆的有限元模型。通过分析可调行程液压缸的工作情况,得到受力最大的工作位置,对此位置进行静力与疲劳分析,校核活塞杆的屈服强度,得到了活塞杆的应力云、变形和寿命分布云图,分析得到活塞杆的薄弱部位。根据有限元分析结果,对活塞杆进行了结构优化与改进,再对优化后的活塞杆进行分析。结果表明优化后的活塞杆特性有显著的提高。

The piston rod of the adjustable stroke of the hydraulic cylinder is taken as the object of study. For its structural characteristics affect the performance of the hydraulic cylinder as a whole, the finite element model is es- tablished based on structural features taking advantage of ANSYS. Through the analysis of the working condition of hydraulic cylinder with adjustable stroke, predict the position of the largest stress condition. Static analysis and fa- tigue analysis of the piston rod were conducted in this position. The yield strength of the piston rod is checked. The stress, deformation and life distribution of the piston rod are obtained. And the deformation is found to be larger which directly affects the sealing performance of the hydraulic cylinder. Based on this analysis, the optimization de- sign to the piston rod is carried out. The structure size of sealing ring is changed. The appropriate transition cham- fer of piston rod is increased and the model again conducted. The results show that the optimum can significantly increase the characteristic of piston rod.