Abstract：A fluid solid coupled vibration simulation model was set up to research the unstable sub-synchronous vibration of tilting pad journal bearing, which is similar to oil whirl. Pad was considered as a vibration system with two degrees including the vertical motion and the tilting motion along pad pivot. Reynolds equation was solved using the finite difference method to calculate oil pressure distribution in the gap in case of changing film thickness. The summarized oil force and moment was reacted on the pad to change pad motion thereafter. Simulation results were verified by test. It shows that pad fluttering will cause the unstable sub-synchronous vibration in certain cases. Influence of bearing gap, rotating speed on pad fluttering was analyzed. Difference between oil whirl and pad fluttering was compared.
张 楚;高庆水;邓小文. 汽轮机可倾瓦颤振引发低频振荡问题研究[J]. , 2014, 33(11): 61-64.
ZHANG Chu;GAO Qing-shui;DENG Xiao-wen. Research on subsynchronous vibration caused by pad fluttering of turbine tilting pad bearing . , 2014, 33(11): 61-64.
2014, Vol. 33 
