航空管路补偿器耐久性计算方法对比分析

本文研究了管路补偿器补偿位移疲劳寿命和耐久振动寿命的有限元分析计算方法。通过对某型管路补偿器有限元仿真计算结果和传统工程计算法计算的结果进行对比分析，研究管路补偿器补偿位移疲劳寿命的有限元计算方法，探索耐久振动寿命的有限元计算流程，并将结果同试验数据对比，以验证其设计方法的计算精度。结果表明，补偿位移的疲劳寿命有限元法的计算精度优于工程设计法；耐久振动寿命有限元法能够给出确定的振动应力分布情况，并预测出耐久振动寿命时间，工程设计法仅能计算出管路补偿器的自振频率，不能明确振动应力和寿命。

Durability Design Research of Aerospace Pipeline Compensator

In this paper, the finite element analysis and calculation methods for compensating displacement fatigue and durable vibration fatigue of Pipeline Compensator are research. By comparing and analyzing the calculation results of finite element simulation and traditional engineering calculation method for a certain type of pipeline compensator, the finite element calculation method for compensating displacement fatigue of pipeline compensator is studied, and the finite element calculation process of durable vibration life is explored. The results are compared with test data to verify the calculation accuracy of its design method. The results show that, the accuracy of the finite element method is better than the engineering design method in calculating the displacement fatigue life. And the finite element method can give the definite distribution of the vibration stress and predict the vibration life, which is better than the engineering design method, which can only provide the natural vibration frequency of compensator, vibration stress and life cannot be defined.