Numerical Simulation and Experimental Research on Pedestal Looseness of a Rotor System
Numerical Simulation and Experimental Research on Pedestal Looseness of a Rotor System
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DOI：
10.1115/detc2007-34199
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
Hui Ma;Hongliang Yao;Z. Ren;Feng Wen;B. Wen
中科院分区：
文献类型：
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作者：
Hui Ma;Hongliang Yao;Z. Ren;Feng Wen;B. Wen
结合工程实际，建立了轴承座紧固螺栓松动的力学模型。采用Adiletta提出的非线性油膜模型，采用数值Runge-Kutta方法研究了其动态特性。最后，利用实验台对轴承座松动进行了实验研究，并对故障信号进行了频谱级联和小波尺度谱重分配分析。数值模拟和实验均表明，随着转速的增加，系统的运动状态发生频繁的变化。实验结果与模拟结果吻合较好。Copyright © 2007 by ASME
The mechanical model of looseness of fastening bolt on the bearing pedestal is set up based on the project practice. Using the nonlinear oil-film model put forward by Adiletta, the dynamic characteristics were investigated by numerical Runge-Kutta method. At last, the experiment is performed to investigate the pedestal looseness by a test rig and the fault signals are analyzed by the spectrum cascade and reassigned wavelet scalogram. Numerical simulation and experiment all show that system motion state changes frequently with the increase of the rotating speed. And the experimental results coincide with the simulation results.Copyright © 2007 by ASME