Coupling vibration mechanism of multistage blisk-rotor system with blade crack

IF 4.5 1区工程技术 Q1 ENGINEERING, MECHANICAL

Mechanism and Machine Theory Pub Date : 2024-08-20 DOI:10.1016/j.mechmachtheory.2024.105767

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引用次数: 0

Abstract

This study aims to address the issue of vibration modeling and coupling vibration mechanism analysis of multistage blisk-rotor (MBR) systems with blade cracks. First, a comprehensive coupling vibration model of the MRB system containing the flexibility of shaft and blade, the swing motion of offset blisk structure, and the nonlinear effect of blade breathing crack is developed. Then, the coupling vibration mechanism of the MRB system is systematically investigated through analytical and numerical analysis, based on which the vibration indicators for the presence of blade cracks are extracted. At last, the effects of blade crack and operating condition parameters on the coupling vibration of the MRB system are comprehensively analyzed. The comparative results indicate that the crack depth and aerodynamic force may significantly affect the crack indicators in shaft bending and torsional vibrations, while the disc unbalance mainly affects the crack indicators in shaft bending vibrations. It is also suggested that the BHM and crack detection of rotating blades should comprehensively consider different crack indicators and perform continuous condition monitoring to obtain more robust and accurate results.

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带叶片裂纹的多级叶盘-转子系统的耦合振动机理

本研究旨在解决带有叶片裂纹的多级叶盘-转子（MBR）系统的振动建模和耦合振动机理分析问题。首先，建立了包含轴和叶片柔性、偏置叶盘结构摆动运动以及叶片呼吸裂纹非线性效应的 MRB 系统综合耦合振动模型。然后，通过分析和数值分析系统地研究了 MRB 系统的耦合振动机理，并在此基础上提取了叶片裂纹存在时的振动指标。最后，综合分析了叶片裂纹和运行工况参数对 MRB 系统耦合振动的影响。对比结果表明，裂纹深度和空气动力可能会对轴弯曲振动和扭转振动的裂纹指标产生显著影响，而圆盘不平衡主要影响轴弯曲振动的裂纹指标。研究还建议，旋转叶片的 BHM 和裂纹检测应综合考虑不同的裂纹指标，并进行连续状态监测，以获得更稳健、更准确的结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Mechanism and Machine Theory 工程技术-工程：机械

CiteScore

9.90

自引率

23.10%

发文量

450

审稿时长

20 days

期刊介绍： Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry