论文部分内容阅读
提出通过静力试验或者有限元模型计算,确定连接接头的危险钉孔位置,修正应力集中系数Kt等对结构细节疲劳额定值(detail fatigue rating,DFR)的影响后,进而确定结构的DFR值的方法。使用该方法对机身上某连接接头进行疲劳寿命分析,给出详细的分析过程与结果,并通过DFR值试验验证该方法的可行性和合理性。
It is proposed that the DFR value of the structure should be determined by static test or finite element model calculation to determine the dangerous nail hole position of the joint and to correct the influence of the stress concentration factor Kt on the detail fatigue rating (DFR) method. The method is used to analyze the fatigue life of a connector on the fuselage, and the detailed analysis process and results are given. The feasibility and rationality of this method are verified by the DFR value test.