Dynamic Analysis of Hydrodynamic Journal Bearing with Herringbone Groove
Date Issued
2004
Date
2004
Author(s)
Chen, Chien-You
DOI
zh-TW
Abstract
The objective of the study is to investigate dynamic characteristics of grooved journal bearing. The hydrodynamic forces are obtained from the bearing pressure distribution, which is solved from Reynolds equation at each position. The spectral element method is applied to increase the accuracy at the grooved boundary. The trajectories are computed from nonlinear equation of motion analysis, including impulse force and mass unbalance. The stability characteristics of journal bearing system are observed from trajectory and fluid film forces for various geometry parameters, such as groove angle, groove depth ratio, and length-to-diameter ratio. Results show the optimum parameters based on the stability and impulsive force. The effect of mass unbalance will increase the possibility of whirling motion, which is the instability factor of dynamic performance in journal bearing system.
Subjects
寬頻元素法
液體動壓頸軸承
人字形溝槽
動態分析
穩定性分析
spectral element method
stability
hydrodynamic grooved bearing
mass unbalance
dynamic analysis
Type
thesis