一种基于S-N曲线的结构高周疲劳寿命估算方法  

An Approach to Estimate High-cycle Fatigue Life in the Structure Based on S-N Curve

作　　者：张逊 姜年朝 周光明[2] 

机构地区：[1]总参六十所,南京210016 [2]南京航空航天大学航空宇航学院,南京210016

出　　处：《机械制造》2013年第12期4-6,共3页Machinery

基　　金：国家自然科学基金资助项目(编号:10772079)

摘　　要：基于有限元法,得到结构在一次任务中各组载荷下的应力水平,以Lagrange插值法拟合材料手册中S-N曲线,得到该任务下的疲劳寿命循环数。将上述算法编译生成可执行文件,实现结构从几何建模到寿命计算的自动化。以某无人直升机桨毂为例,估算其一次任务载荷下的高周循环次数。Based on the finite-element approach, the stress level in the structure under the load from each set in the mission can be obtained , And the fatigue life cycles under the task could be obtained by using Lagrange interpolation method to fit S-N curve in the guide book for material. By compiling the above algorithm into an executable file, it is possible to realize the automation from geometric modeling to life calculation for the structure. This article also takes the rotor hub of unmanned helicopter as the example to estimate the high cycle index under each mission load .

关 键 词：高周疲劳 S-N曲线 有限元法 无人直升机 旋翼桨毂 

分 类 号：TH166[机械工程—机械制造及自动化] V215.21[航空宇航科学与技术—航空宇航推进理论与工程]