摘要
测定缸套的疲劳寿命,需使试件的应力与缸套一致。为达到该效果,利用ANSYS的优化模块,将疲劳试验机施加拉力及扭矩的大小作为设计变量,试件危险点的等效应力作为状态变量,构造适当的目标函数,使试件危险点的应力状态与缸套危险点的应力状态完全相同,最终优化后的拉力及扭矩大小即为疲劳试验机实际加载的载荷。结果表明,通过ANSYS的优化功能可以快速、精确的确定疲劳试验机的载荷,为预测缸套等零件的疲劳寿命提供准确的边界条件。本文的优化结果已用于某柴油机缸套的寿命预测。
To determine the fatigue life of the liner, the specimen stress need to consistent with the cylinder. Through ANSYS optimization module, the tensile force and torque magnitude of fatigue testing machine as the design variables, the von--mises stress of the dangerous point as state variables, constructing a suitable obiective function. And the stress state of the danger point of the specimen is identical with the cylinder danger point, then the final optimized loads are the fatigue testing machine actually loaded. The results show that ANSYS optimization module can quickly and accurately determine the fatigue testing machine load. And providing an accurate boundary conditions for predicting the fatigue life of cylinder liners or other components. The optimization results in this paper have been used to predict the life of a diesel engine cylinder lin- er.
出处
《内燃机与配件》
2014年第3期8-11,共4页
Internal Combustion Engine & Parts
关键词
ANSYS优化分析
缸套
疲劳试验机载荷
有限元
ANSYS Optimization Analysis Cylinder Liner Load of Fatigue Testing Ma-chine FEM
