识别V型推力杆杆体失效的双向疲劳试验设计及应用

Design and Application of Bi-directional Fatigue Test to Identify the Failure of V-typed Thrust Rod

针对V型推力杆杆体在应用中出现的疲劳失效问题,从V型推力杆的结构及承载形式入手,依据实测路谱等效载荷条件,通过复杂工况的有限元分析及多种疲劳试验进行研究。结果表明本文提出的“纵向+横向”双向疲劳试验方法能够再现V型推力杆失效模式。

In view of the fatigue failure problem of the V-typed thrust rod body in an application,this paper starts from the structure and bearing type of the V-typed thrust rod,stvdies the finite element analysis of complex working conditions and various fatigue tests according to the equivalent load conditions of the measured road spectrum.The results show that the longitudinal+transverse bi-directional fatigue test method proposed in this paper can represent the failure mode of the V-typed thrust rod.