考虑材料物理参数为随机量时可靠度的计算

RALIABILITY CALCULATION IN CONSIDERATION OF PHYSICAL PARAMETERS OF A MATERIAL AS RANDOM PARAMETERS

本文主要考虑了材料物理参数为随机量时 ,利用随机有限元及 H- L方法对定向结晶涡轮叶片进行可靠度计算。计算方法收敛 ,说明本方法可行。从计算结果表明 ,物理参数为随机量时 (相对于外载及材料机械性能为随机量时 )

A method of reliability calculation for directionally solidified turbine blade has been provided,which mainly considers physical parameters as random by means of stochastic FEM and Hasofer Lind method.The method ensures convergency of its calculation,so it is feasible.The calculation results indicate that physical parameters as random ones have less influence on the failure probability than the loading and mechanical parameters.