阶梯动静压滑动轴承结构参数优化  

Structural Parameters Optimization of Stepped Hydrostatic Journal Bearing

作　　者：王丽娜 李汝勇[1] 柳礼 张军社[1] WANG Lina;LI Ruyong;LIU Li;ZHANG Junshe(Advanced Manufacturing and Transportation Department, Hangzhou Wanxiang Polytechnic, Hangzhou 310023, China)

机构地区：[1]杭州万向职业技术学院先进制造与交通系

出　　处：《机械工程师》2019年第6期167-171,共5页Mechanical Engineer

摘　　要：为获得阶梯动静压滑动轴承的最优静动力特性,对轴承结构参数优化问题开展研究。首先,为避免油膜厚度在阶梯处沿圆周方向不可导问题,基于有限元法使用MATLAB编程对二维雷诺方程进行求解,得到其静力特性和动力特性;其次,以承载力为目标函数采用遗传算法对轴承结构参数进行优化。研究表明:有限元法不仅容易编程实现对雷诺方程的求解,而且能避免油膜厚度在阶梯处不可导的问题;轴承的每个油垫处均形成局部的压力峰值;使用遗传算法对轴承结构参数进行优化使其承载力提高51.8%。In order to obtain the optimal static and dynamic characteristics of step hydrostatic journal bearings, the optimization of bearing structural parameters is studied. Firstly, in order to avoid the non differentiable problem of oil film thickness along the circumferential direction at the step, the Reynolds equation is solved by using MATLAB based on the finite element method, and its static and dynamic characteristics are obtained. Secondly, the bearing capacity is taken as the objective function, and the genetic algorithm is used to optimize the bearing structure parameters. The results show that the finite element method not only avoids the problem that the oil film thickness is not derivable at the step, but also is easy to solve the Reynolds equation by programming. Local peak pressure is formed at each oil cushion. The bearing structural parameters are optimized by genetic algorithm to enhance the bearing capacity. The height is 51.8%.

关 键 词：阶梯动静压轴承 有限元法 静动力特性 结构参数 遗传算法 

分 类 号：TH117.2[机械工程—机械设计及理论]