针对舰船汽轮机机组出现的基础松动故障问题，考虑汽轮机叶尖间隙汽流激振的影响，建立汽轮机汽流激振力作用下的转子松动故障分析模型。采用数值求解方法，结合系统响应的分岔图、轴心轨迹图、Poincare截面图、频谱图等分析研究转速、支座质量、质量偏心等参数对系统非线性振动响应的影响，为汽轮机叶尖间隙汽流激振下具有松动故障的汽轮机转子系统动力学特性分析和故障诊断提供一定参考。
Aiming at the problem of the basic looseness of the ship steam turbine unit, considering the influence of steam turbine blade tip clearance steam excitation, the rotor looseness fault analysis model under the steam flow-exciting force of the steam turbine is established. Using numerical solution method, combined with the bifurcation diagram, axial trajectory diagram, Poincare section diagram and spectrogram of system response, the effects of parameters such as rotational speed, bearing mass and mass eccentricity on the nonlinear vibration response of the system are studied. The dynamic characteristics analysis and fault diagnosis of steam turbine rotor system with loose fault under the tip clearance steam flow excitation provide some reference.
2020,42(6): 126-131 收稿日期：2019-05-26
DOI：10.3404/j.issn.1672-7649.2020.06.025
分类号：TJ05
作者简介：瓮雷(1988-),男,工程师,主要从事舰船动力系统试验及振动故障研究
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