陶瓷滑动轴承磨损可靠性建模及仿真分析

Wear Reliability Modeling and Simulation Analysis of Ceramic Plain Bearing

以一种全Al_(2)O_(3)陶瓷滑动轴承为研究对象,基于Evans陶瓷磨损失效模型和轴承几何模型,建立陶瓷滑动轴承的磨损深度函数模型,并编制MatLab仿真程序确定磨损深度概率分布函数。使用所建立磨损深度函数模型一阶原点矩及二阶中心矩结合数值积分法建立陶瓷轴承磨损可靠度模型,并使用Monte Carlo可靠度仿真方法进行验证。根据磨损可靠度计算与仿真结果,分析不同参数对可靠度的影响,结果表明:可靠度随工作时长、载荷、转速的增加而减小,随轴瓦长度增加而增大,且可靠度曲线都呈现出初期变化平缓,随后快速变化,最后再次趋于平缓的趋势。

Based on the Evans ceramic wear failure model and bearing geometry model,a wear depth function model of Al_(2)O_(3) ceramic plain bearings was established,and MatLab simulation program was compiled to determine the wear depth probability distribution function.The reliability model was established by combining the first-order origin moment and the second-order central moment with numerical integration method of the established wear depth function model,and the Monte Carlo reliability simulation method was used for verification.According to the reliability calculation and simulation values,the influence of different parameters on reliability was analyzed.The results show that the reliability decreases with the increase of working time,load and speed,and increases with the increase of bearing length.The reliability curve shows a trend of initial flat change,then rapid change,and finally flattening again.