具有两个或多个缺陷的轴间轴承突发性脉冲振动的时滞动力学行为

IF 8.9 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Tian Gao , Si-Min Yuan , Zhi-Qi Sun , Qiang Ma , Shu-Qian Cao
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引用次数: 0

摘要

由于复杂的安装环境和具有挑战性的润滑条件,轴间轴承容易发生局部故障,可诱发两种基本振动类型:突发性脉冲振动和连续脉冲振动。研究了多局部故障条件下轴间轴承突发性脉冲振动的时滞动力特性。采用集总参数法建立了具有多个局部故障的轴间轴承的动力学模型。通过数值积分得到了轴间轴承-双转子系统的振动响应。结果表明,在一个突发性脉冲振动响应中,多个局部缺陷可以触发不同类型的脉冲振动,并且这些不同类型的脉冲振动之间存在规则的时滞动力行为。在大时间尺度上分析了突发性脉冲振动的时滞动力学特性,并在小时间尺度上阐明了其潜在的力学机理。提出了一种精确的预测方法来预测这种现象。推导的预测公式可以准确地估计单个缺陷引起的突发性脉冲振动的时间间隔,以及多个缺陷引起的不同类型脉冲振动之间的具体延迟时间。对轴间轴承的振动实验验证了多故障诱发的突发性脉冲振动的时滞动力现象。此外,实验结果证实了所提出的预测方法在准确预测时滞动态行为方面的有效性。本研究为研究多局部故障轴间轴承的振动机理提供了有价值的见解,为轴间轴承健康监测奠定了理论基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Time-delayed dynamic behavior of paroxysmal impulse vibrations in inter-shaft bearings with two or multiple defects
Due to the complex installation environment and challenging lubrication conditions, inter-shaft bearings are susceptible to localized faults, which can induce two basic vibration types: paroxysmal impulse vibrations and continuous impulse vibrations. This paper investigates the time-delayed dynamic behavior of paroxysmal impulse vibration in inter-shaft bearings under multiple localized fault conditions. A dynamic model for inter-shaft bearings with multiple localized faults is developed using a lumped-parameter method. The vibration response of an inter-shaft bearing-dual rotor system is obtained through numerical integration. The results reveal that multiple localized defects can trigger distinct types of impulse vibrations within a paroxysmal impulse vibration response, and there is a regular time-delayed dynamic behavior between these distinct types of impulse vibrations. The time-delayed dynamic characteristics of paroxysmal impulse vibration are analyzed on a large time scale, while the underlying mechanical mechanisms are elucidated on a small time scale. A precise prediction method is developed to forecast this phenomenon. The derived prediction formula can accurately estimate the time interval of paroxysmal impulse vibrations caused by a single defect, as well as the specific delay times between distinct types of impulse vibrations resulting from multiple defects. Vibration experiments on inter-shaft bearings validate the time-delayed dynamic phenomenon of paroxysmal impulse vibration induced by multiple faults. Additionally, the experimental results confirm the effectiveness of the proposed prediction method in accurately forecasting the time-delayed dynamic behavior. This research provides valuable insights into the vibration mechanisms of inter-shaft bearings with multiple localized faults, laying a theoretical foundation for the health monitoring of inter-shaft bearings.
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来源期刊
Mechanical Systems and Signal Processing
Mechanical Systems and Signal Processing 工程技术-工程:机械
CiteScore
14.80
自引率
13.10%
发文量
1183
审稿时长
5.4 months
期刊介绍: Journal Name: Mechanical Systems and Signal Processing (MSSP) Interdisciplinary Focus: Mechanical, Aerospace, and Civil Engineering Purpose:Reporting scientific advancements of the highest quality Arising from new techniques in sensing, instrumentation, signal processing, modelling, and control of dynamic systems
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