欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
基于计算流体动力学（CFD）得到的水力学数据，采用有限元法对水轮机叶片的动应力进行数值分析，提取危险部位的应力时问历程进行雨流计数，建立了疲劳应力均值和幅值的二维随机变量分布规律并进行母体分布Х^2的检验，为水轮机叶片的疲劳可靠性设计校核研究奠定了基础。
英文摘要：
Fatigue stress analysis of Francis turbine blade is the first step of fatigue reliability design. The data calculated by Computational Fluid Dynamics （CFD） software were firstly transformed into the finite element analysis （FEA） software ANSYS by the interface program written in VC＋ ＋ language. Then, numerical analysis was carried out to obtain the fatigue stress by finite element method. The result shows that the spot of maximum stress by FEA analysis agrees with the observed actual failure location on the blade. By applying the rain-flow cycle counting to the stress time history, the two basic stochastic quantities of applied fatigue stress cycle-mean and amplitude-mean were counted to estimate the joint distribution density function parameters and then hypothesis test was checked for the joint distribution.
同期刊论文项目
同项目期刊论文
位置：