ON THE NON-LINEAR DYNAMICS OF A FLEXIBLE ROTOR SUPPORTED ON POROUS OIL JOURNAL BEARINGS

摘要：

In the present analysis dynamic response of a flexible rotor with a rigid disk under unbalance excitation mounted on porous oil journal bearings at the two ends is investigated. The system equation of motion is obtained by finite element formulation of Timoshenko Beam and the disk. The non-linear oil-film forces are calculated from the solution of the modified Reynolds equation simultaneously with Darcy’s equation. The system equation of motion is then solved by the Wilson- θ method. The effect of various non-dimensional rotorbearing parameters on the bifurcation behaviour of the system is studied. It is shown that the system undergoes Hopf bifurcation as the speed increases. Further, slenderness ratio and material properties of the rotor have profound effect on the bifurcation characteristics of the rotor-bearing system.

关键词： non-linear bifurcation flezible rotor porous bearing

作者: S K Laha S K Kakoty

作者单位: Department of Mechanical Engineering, Indian Institute of Technology GuwahatiGuwahati, India-781039

会议类型: 国际会议

会议名称: The Fifth International Conference on VETOMAC-V(第五届振动工程及机械技术国际会议)

会议地点: 武汉

会议语种:英文

页码: 370-376

在线出版日期: 2009-08-27（万方平台首次上网日期，不代表论文的发表时间）