Approximate analytical model for fluid film force of finite length plain journal bearing

作者：Wang Y L^*; Liu Z S; Kang W J; Yan J J

来源：Proceedings of the Institution of Mechanical Engineers - Part C: Journal of Mechanical Engineering Science , 2012, 226(C5): 1345-1355.

DOI：10.1177/0954406211418302

• finite length journal bearing
• separation of variables method
• fluid film force
• approximate analytical model

Non-linear dynamic performance of rotor-bearing systems supported by plain journal bearings strongly depends on the mathematical oil film force model. In this article, the analytical solution of oil film pressure for finite length plain journal bearing is obtained by employing the separation of variables method to analytically solve the Reynolds equation based on dynamic Gumbel boundary conditions. The analytical expression of oil film force is then derived by applying the integral method. The expression of the pressure is analysed to investigate the pressure distribution. The oil film force of the analytical model is compared with the results from other methods, namely, long bearing approximation, short bearing approximation, as well as the finite difference method. The results clearly validate the current model. The proposed model also proved to be efficient for analysing the dynamic characteristics of a rigid rotor supported by plain journal bearings.

• 出版日期2012
• 单位哈尔滨工业大学