Vibration fault features of the rotor with cracks under steam flow-exciting force of a marine steam turbine

被引：0

作者：

Weng L. ^{[1
]}

Zhang L. ^{[2
]}

机构：

[1] No.91404, Unit of PLA, Qinhuangdao

[2] Institute of High Temperature Structural Composite Materials for Naval Ship, Naval University of Engineering, Wuhan

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2020年 / 39卷 / 22期

关键词：

Crack; Nonlinear vibration; Rotor system; Steam flow-exciting force;

D O I：

10.13465/j.cnki.jvs.2020.22.019

中图分类号：

学科分类号：

摘要：

The rotor model with faults under the steam flow-exciting force of a marine steam turbine was established, and the numerical method was adopted to analyse nonlinear vibration characteristics of the rotor system with cracks under steam flow-exciting force. The calculation results show that the occurance of dynamic periodic responses of the system advances, and the chaotic area near the critical speed is significantly narrower. When the crack depth is further increased, the chaotic area becomes smaller and almost disappears. When the eccentricity is small, the steam flow-exciting force will have little effect on the system, but as the eccentricity increases further, the steam flow-exciting force will have a significant impact on the system. As the amount of eccentricity is increased to a certain extent, the presence or absence of steam flow-exciting force has little effect on the system, and the influence of eccentricity on the system dominates. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.

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页码：137 / 142and168

共 11 条

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