Vibrational Interaction of Two Rotors with Friction Coupling

Q2 Physics and Astronomy

Advances in Acoustics and Vibration Pub Date : 2016-10-18 DOI:10.1155/2016/9275147

H. Larsson, K. Farhang

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引用次数: 1

Abstract

A lumped parameter model is presented for studying the dynamic interaction between two disks in relative rotational motion and in friction contact. The contact elastic and dissipative characteristics are represented by equivalent stiffness and damping coefficient in the axial as well as torsional direction. The formulation accounts for the coupling between the axial and angular motions by viewing the contact normal force a result of axial behavior of the system. The model is used to investigate stick-slip behavior of a two-disk friction system. In this effort the friction coefficient is represented as an exponentially decaying function of relative angular velocity, varying from its static value at zero relative velocity to its kinetic value at very high velocities. This investigation results in the establishment of critical curve defining two-parameter regions: one in which stick-slip occurs and that in which stick-slip does not occur. Moreover, the onset and termination of stick-slip, when it occurs, are related to the highest component frequency in the system. It is found that stick-slip starts at a period nearly equal to that of the highest component frequency and terminates at a period almost three times that of the highest component frequency.

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具有摩擦联轴器的两转子振动相互作用

提出了一种集总参数模型，用于研究两盘相对旋转运动和摩擦接触时的动态相互作用。接触弹性和耗散特性由轴向和扭转方向的等效刚度和阻尼系数表示。该公式通过观察系统轴向行为的接触法向力来解释轴向运动和角运动之间的耦合。利用该模型研究了双盘摩擦系统的粘滑行为。在这项工作中，摩擦系数表示为相对角速度的指数衰减函数，从相对速度为零时的静态值到非常高的速度时的动态值。研究结果建立了临界曲线，定义了两个参数区域:一个发生粘滑，另一个不发生粘滑。此外，当粘滑发生时，粘滑的发生和终止与系统中最高分量频率有关。研究发现，粘滑开始的周期几乎等于最高分量频率的周期，结束的周期几乎是最高分量频率的三倍。

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Advances in Acoustics and Vibration ACOUSTICS-

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期刊介绍： The aim of Advances in Acoustics and Vibration is to act as a platform for dissemination of innovative and original research and development work in the area of acoustics and vibration. The target audience of the journal comprises both researchers and practitioners. Articles with innovative works of theoretical and/or experimental nature with research and/or application focus can be considered for publication in the journal. Articles submitted for publication in Advances in Acoustics and Vibration must neither have been published previously nor be under consideration elsewhere. Subject areas include (but are not limited to): Active, semi-active, passive and combined active-passive noise and vibration control Acoustic signal processing Aero-acoustics and aviation noise Architectural acoustics Audio acoustics, mechanisms of human hearing, musical acoustics Community and environmental acoustics and vibration Computational acoustics, numerical techniques Condition monitoring, health diagnostics, vibration testing, non-destructive testing Human response to sound and vibration, Occupational noise exposure and control Industrial, machinery, transportation noise and vibration Low, mid, and high frequency noise and vibration Materials for noise and vibration control Measurement and actuation techniques, sensors, actuators Modal analysis, statistical energy analysis, wavelet analysis, inverse methods Non-linear acoustics and vibration Sound and vibration sources, source localisation, sound propagation Underwater and ship acoustics Vibro-acoustics and shock.