The effect of an undamped finite degree of freedom ‘‘fuzzy’’ substructure: Numerical solutions and theoretical discussion
The effect of an undamped finite degree of freedom ‘‘fuzzy’’ substructure: Numerical solutions and theoretical discussion
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无阻尼有限自由度“模糊”子结构的影响：数值解和理论讨论
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
R. Weaver
中科院分区：
文献类型：
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作者：
R. Weaver
本文从理论上和数值上研究了一个简单的无阻尼N自由度模糊子结构上的单自由度主振子。结果被发现是在雅阁符合的皮尔斯-斯派洛-罗素理论的预测在早期的时候，特别是，主振荡表现出明显的阻尼。然而，在稍后的时间，阻尼停止，能量从模糊器返回到主控器。能量返回的精确方式以及这样做所花费的时间取决于模糊共振内的质量和频率分布的细节，特别是模糊共振之间的间距分布。
A single degree of freedom master oscillator attached to a simple undamped N degree of freedom ‘‘fuzzy substructure’’ is studied numerically and theoretically. Results are found to be in accord with the predictions of the Pierce–Sparrow–Russell theory at early times; in particular, the master oscillation manifests an apparent damping. At later times, however, the damping ceases and the energy is returned from the fuzzy to the master. The precise manner in which the energy is returned, and the time taken to do this, depend on the details of the mass and frequency distribution within the fuzzy, and in particular on the distribution of spacings between the fuzzy resonances.