Research on the dynamic characteristics of the squeeze film damper of a certain aero-engine

Affiliation of Author(s):能源与动力学院

Journal:Vibroeng. Procedia

Abstract:Numerical methods were conducted to simulate the characteristics of SFD under different clearance, eccentricity and precession angular velocity and verified by bidirectional excitation experiments, which is comparatively leading initiative in characteristic measurement of SFD. In addition, finite difference method was introduced to derive Reynolds equation and SOR method to obtain the distribution of oil film, the convergence was also mathematical proof. The results indicate the rotor system keep large vibration state for a long time due to the increasing of actual critical speed of system, which result from the oil film stiffness increases nonlinear excessively with the increase of eccentricity; clearance make a great influence on SFD, especially SFD with large radial size should be kept within 2 ‰. © 2019 Xue-Min Liao, et al.

ISSN No.:2345-0533

Translation or Not:no

Date of Publication:2019-10-01

Co-author:Liao, Xue-Min,Feng, Zhao-Jun,Chen, Li-Jia,Zheng, Nan

Correspondence Author:lgh

Date of Publication:2019-10-01