水电站单、双吊点门机共用负荷试验吊笼的结构有限元分析与优化

Finite Element Analysis and Optimization of Common Load Test Cage for Single-Double Point Crane in Hydropower Station

基于弹性力学基本理论,采用有限元分析软件ANSYS Workbench,对桐子林水电站单、双吊点门机负荷试验吊笼结构进行有限元分析,得出了各工况下吊笼结构应力变形和最大位移的分布规律。计算结果表明:最大应力发生在吊笼端部箱型主梁后翼缘与隔板交界处,说明在交界处产生了应力集中现象,应力随着离交界处距离的增加而减小,为了保证门机负荷试验吊笼结构的安全可靠,现对吊笼结构的应力集中区域进行了结构优化,优化后的吊笼结构能够同时满足单、双吊点门机负荷试验工况下的强度和刚度要求,可为今后类似单、双吊点门机共用负荷试验吊笼结构的设计提供参考。

Based on the basic theory of elastic mechanics,the finite element of the single and double hoisting cage of the load test of the crane in the power is analyzed using finite element software ANSYS Workbench,and the distribution law of stress deformation and maximum displacement of cage structure under different working conditions is obtained.According to the analysis result,The maximum stress occurs at the junction of the box-shaped main girder and the baffle at the end of the box,indicating that stress concentration occurs at the junction,and the stress decreases as the distance from the boundary decreases.In order to ensure the safe and reliable structure of the hoisting cage of load test,the structure of the stress concentration of the cage structure is optimized.The optimized cage structure can meet the requirements of strength and stiffness under various operating conditions in the load test cage with crane,and it is provide a theoretical reference for the similar hoisting cage structure of load test of crane in the future.