CAJ | 학술논문

为了考虑平均应力对循环载荷作用下结构振动疲劳寿命的影响，对 Tovo-Benasciutti 疲劳损伤模型进行了平均应力修正。采用径向基函数法构造平均应力修正系数与随机应力带宽系数之间的近似模型，建立了考虑平均应力的 Tovo-Benasciutti 疲劳损伤模型。利用所建立的模型对某简单梁进行了疲劳寿命估计。结果表明：考虑平均应力效应的 Tovo-Benasciutti 模型能得到与试验更一致的结果。
위료고필평균응력대순배재하작용하결구진동피로수명적영향，대 Tovo-Benasciutti 피로손상모형진행료평균응력수정。채용경향기함수법구조평균응력수정계수여수궤응력대관계수지간적근사모형，건립료고필평균응력적 Tovo-Benasciutti 피로손상모형。이용소건립적모형대모간단량진행료피로수명고계。결과표명：고필평균응력효응적 Tovo-Benasciutti 모형능득도여시험경일치적결과。
In order to consider the mean stress effects on the structural vibration fatigue life under cyclic loads,the paper proposed a method to revise the Tovo-Benasciutti fatigue damage model.An approximate model between the mean stress correcting coefficient and the random stress band coeffi-cient was built with radial basis function,and the Tovo-Benasciutti fatigue damage model was built under considering the mean stress effects.The fatigue life for a simple beam was estimated with Tovo-Benasciutti fatigue damage model under considering the mean stress effects,the results show that the Tovo-Benasciutti fatigue damage model under considering the mean stress effects can get a closer result to the test.