蒙特卡罗法液压缸动态特征可靠性灵敏度分析

针对液压缸动态特征参数一般呈现隐式和非线性的特点，基于蒙特卡罗法开展可靠性和可靠性灵敏度分析研究。首先，考虑到非线性弹簧力和时变摩擦力的作用机理，建立液压缸动力学模型；之后，根据微分方程理论进行求解，分析不同润滑条件下活塞速度在时域的变化情况；最后，依据蒙特卡罗法基本思想，利用结构失效概率和可靠性灵敏度分析方法，对液压缸低速时的运动可靠性及影响参数灵敏度进行分析。

Reliability Sensitivity Analysis of Dynamic Characteristics of Hydraulic Cylinder Based on Monte Carlo Method

In view of the implicit and nonlinear characteristics of the dynamic characteristic parameters of the hydraulic cylinder, the reliability and reliability sensitivity analysis is carried out based on the Monte Carlo method. First, considering the action mechanism of nonlinear spring force and time-varying friction force, the dynamic model of hydraulic cylinder is established; then, the differential equation theory is used to solve the problem, and the change of piston speed in time domain under different lubrication conditions is analyzed; finally, according to the basic idea of Monte Carlo method, the structural failure probability and reliability sensitivity analysis method are derived, which can be used to analyze the low speed of hydraulic cylinder The reliability of motion and the sensitivity of influencing parameters are analyzed.