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Effect of high-frequency excitation on friction induced vibration caused by the combined action of velocity-weakening and mode-coupling
Journal of Vibration and Control ( IF 2.8 ) Pub Date : 2020-01-09 , DOI: 10.1177/1077546319889866
Pradyumna K Sahoo 1 , Shyamal Chatterjee 1
Affiliation  

The present article studies the effects of both tangential and normal high-frequency excitations on a two-degree-of-freedom moving-mass-on-belt which represents a minimal model incorporating both velocity-weakening instability (so-called Stribeck effect) and mode-coupling instability (so-called binary flutter). The method of direct partition of motion is employed for studying the characteristics of the system in slow time scale. Linear stability analysis is performed near the equilibrium point of the system for both with and without sinusoidal high-frequency excitation. It is observed that the instability can be suppressed by the tangential high-frequency excitation only for a specific range of strength of excitation. However, stability does not improve under normal high-frequency excitations, though amplitude of the self-excited oscillation can be controlled to some extent. Direct numerical simulations are carried out in MATLAB SIMULINK to validate the analytical predictions.

中文翻译:

高频激励对速度弱化与模式耦合共同作用引起的摩擦感应振动的影响

本文研究了切向和正常高频激励对皮带上两自由度运动质量的影响,该运动代表了同时包含速度弱化不稳定性(所谓的斯特里贝克效应)和模式耦合不稳定性(所谓的二进制抖动)。运动的直接分配方法用于研究慢速时标系统的特性。在有和没有正弦波高频激励的情况下,都在系统的平衡点附近进行线性稳定性分析。可以看出,仅在特定的激励强度范围内,切向高频激励才能抑制不稳定性。但是,在正常的高频激励下稳定性不会提高,虽然自激振荡的幅度可以在一定程度上控制。在MATLAB SIMULINK中进行直接数值模拟以验证分析预测。
更新日期:2020-01-09
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