基于有限元方法的液压缸结构优化设计

Hydraulic cylinder optimization design based on finite element method

为了减小液压缸的重量,提高产品使用寿命,对某型号液压缸进行了静力学仿真,得到了液压缸的变形、应力参数。优化设计时以缸体内孔半径、缸体壁厚、活塞杆半径尺寸参数为输入参数,液压缸的变形、应力、质量为输出参数,通过ANSYS软件仿真分析获得了液压缸变形、应力、质量与缸体内孔半径、缸体壁厚、活塞杆半径尺寸之间的关系。然后以液压缸变形、应力、质量为优化目标,对其进行了优化设计。结果表明,通过有限元分析,液压缸的最大应力减小2.3%,最大变形减小4%,质量减小5.65%。

In order to reduce the weight of the hydraulic cylinder and improve the service life of the product,firstly carried out static simulation of a certain type of hydraulic cylinder,and obtained the deformation and stress parameters of the hydraulic cylinder.In the optimization design,the cylinder bore radius,cylinder wall thickness and piston rod radius size parameters are taken as input parameters.The deformation,stress and mass of the hydraulic cylinder are the output parameters.The deformation,stress and quality of the hydraulic cylinder are obtained through ANSYS software simulation analysis.The relationship between the hole radius of the cylinder,the wall thickness of the cylinder and the radius of the piston rod is optimized by the deformation,stress and mass of the hydraulic cylinder.The results show that by finite element analysis,the maximum stress of the hydraulic cylinder is reduced by 2.3%,the maximum deformation is reduced by 4%,and the mass is reduced by 5.65%.