Frequency response analysis of multi-degree-of-freedom system with harmonically varying damping
Frequency response analysis of multi-degree-of-freedom system with harmonically varying damping
复制标题
谐波变化阻尼多自由度系统频率响应分析
DOI：
10.1117/12.915041
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Satoshi Hirohata ; Daisuke Iba
中科院分区：
文献类型：
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作者：
S. Hirohata;D. Iba;M. Nakamura and I. Moriwaki;Junichi Hongu ; Daisuke Iba;Satoshi Hirohata ; Daisuke Iba
本文分析了谐波变化阻尼对多自由度系统的影响。我们最近的研究将谐波变化阻尼方法应用于具有两个频率的正弦基础激励的单自由度结构的减振。在研究中，理想的可变阻尼器与次级正弦基础激励结合使用，以减少初级基础激励引起的响应。如果初级正弦基础激励包含系统的固有频率，则会引起共振。然而，由可变阻尼装置和次级基础激励引起的调制分量可以产生另一个谐振。附加共振被调整为与主响应异相，从而实现对结构的有效控制。然而，尚未进行考虑多自由度系统的此类研究。本文特别介绍了谐波变化阻尼对多自由度系统的影响；讨论了中间有可变阻尼器对两个并联结构的影响。
This paper analyzes effects of harmonically varying damping on a multi-degree-of freedom system. Our recent research applied the method of the harmonically varying damping to vibration mitigation of a single-degree-of-freedom structure with sinusoidal base excitation having two frequencies. In the study, an ideal variable damper is used in conjunction with the secondary sinusoidal base excitation to reduce response due to the primary base excitation. If the primary sinusoidal base excitation contains the natural frequency of the system, resonance is induced. However, another resonance can be generated by the modulated component caused by the variable damping device and the secondary base excitation. The additional resonance is adjusted to be out of phase with the primary response, resulting in effective control of the structure. However, no such study considering the multi-degree-of-freedom system has been conducted. This paper presents the effect of the harmonically varying damping on the multi-degree-of-freedom system, especially; the influence on two structures in parallel with a variable damper between there is discussed.