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	随机载荷下混流式叶片疲劳应力分析
	张丽霞 ; 张伟 ; 杨朝红 ; 潘际銮 ; ZHANG Lixia ; ZHANG Wei ; YANG Zhaohong ; PAN Jiluan
	2010-05-13 ; 2010-05-13
关键词	混流式水轮机 有限元分析 雨流计数法 载荷谱 疲劳可靠性设计 Francis turbine finite element analysis(FEA) rain-flow counting loading spectrum fatigue reliability design TV312
其他题名	Fatigue Stress Analysis of Francis Turbine Blade under Stochastic Loading
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间历程进行雨流计数,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χ2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。; 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.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/30858]
专题	清华大学
推荐引用方式 GB/T 7714	张丽霞,张伟,杨朝红,等. 随机载荷下混流式叶片疲劳应力分析[J],2010, 2010.
APA	张丽霞.,张伟.,杨朝红.,潘际銮.,ZHANG Lixia.,...&PAN Jiluan.(2010).随机载荷下混流式叶片疲劳应力分析..
MLA	张丽霞,et al."随机载荷下混流式叶片疲劳应力分析".(2010).

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