起落架收放机构时变可靠度与时变全局可靠性灵敏度分析

摘要

以某型飞机起落架收放机构为研究对象,考虑载荷与抗力的随机性和时变性,采用时变全局可靠性灵敏度分析理论,研究了各输入随机因素对起落架收放机构时变可靠性的影响大小和作用机理.首先利用MATLAB与ADAMS的联合仿真得到各输入变量样本值对应的输出响应值,结合神经网络与自适应Kriging模型构建极限状态函数的代理模型,在此基础上采用抽样方法实现收放机构的时变可靠度及其时变全局可靠性灵敏度的计算.%For a certain type of aircraft landing gear mechanism,considering the characteristics of random and time-varying of the load and resistance,the time-varying global reliability sensitivity analysis theory is used to study the effect and interaction mechanism of random factors on the landing gear mechanism.The output response of each input variable sample value is obtained with the joint simulation of MATLAB and ADAMS.Based on the neural network and adaptive Kriging model,the agent model of limit state function is established.Sampling method is used to realize the calculation of time-variant reliability and time-varying global reliability sensitivity of the landing gear mechanism.