Research on Simulation of Fatigue Reliability Based on RainflowCounting Range
In order to evaluate fatigue reliability of single structure under random load,based onrainflow counting range of stress-time history,fatigue strength reliability of structure is obtained bymeans of stress-strength interference theory and Dirliks probability density function of rainflowcounting range,as well as by assuming that fatigue limit accords with normal distribution.Also byusing Miners damage cumulative theory,assuming that fatigue life accords with lognormaldistribution,and taking into account dispersion of damage cumulative criterion value,given finite lifereliability of structure is obtained by means of Monte-Carlo simulation method.The results show thatalthough maximum range in stress-time history is greater than fatigue limit,when a majority of cyclerange in stress-time history is less than fatigue limit,structure has high reliability of fatigue strength.The results of given finite life reliability indicate that although structure has high reliability fatiguestrength under single stress-time history,fatigue reliability of structure experiencing many cycles willgradually decrease.
Fatigue reliability Rainflow counting range Miner damage cumulative Monte-Carlo simulation
G.W.Yang S.N.Xiao
National Key Laboratory of Traction Power,Southwest Jiaotong University,China
国际会议
成都
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）