A MODAL INTERACTION INDICATOR FOR QUALIFYING Cs AS AN INDICATOR OF STRENGTH OF COUPLING BETWEEN SEA SUBSYSTEMS
A MODAL INTERACTION INDICATOR FOR QUALIFYING Cs AS AN INDICATOR OF STRENGTH OF COUPLING BETWEEN SEA SUBSYSTEMS
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DOI：
10.1006/jsvi.2000.2929
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发表时间：
2000-08
影响因子：
4.7
通讯作者：
P. P. James-P.;F. Fahy
中科院分区：
文献类型：
--
作者：
P. P. James-P.;F. Fahy
在之前的两篇论文[1,2]中，提出了SEA子系统之间耦合强度的指示技术。然而，计算模拟揭示了耦合强度指标cs使用的明显局限性。当cs值大于0.07时，表明弱耦合；当cs值小于0.07时，只有当各子系统的非耦合共振频率足够接近时，才表明子系统之间存在强耦合。为了克服CS小值解释的这一主要困难，提出了模态相互作用的指标mp。在弱耦合的情况下，模态相互作用与不耦合共振频率之间的接近直接相关。m2的定义取决于两个振子之间耦合的确定性分析和不耦合谐振模式之间相互作用的统计模型。Mp可以在装配结构上进行评估，并提高cs的可靠性，作为SEA子系统之间耦合强度的指标。
Abstract In two previous papers [1, 2], a technique for the indication of strength of coupling between SEA subsystems was proposed. However, an apparent limitation to the use of the coupling strength indicatorCS was revealed by computational simulation. Whereas a value for CSgreater than 0·07 clearly indicates weak coupling, a smaller value only confirms strong coupling between subsystems when the uncoupled resonance frequencies of each subsystem are sufficiently proximate. In order to overcome this major difficulty in the interpretation of small values for CS, an indicator of modal interactionMp is proposed. In the case of weak coupling, modal interaction is directly related to the proximity between uncoupled resonance frequencies. The definition of Mprelies upon both a deterministic analysis of the coupling between two oscillators and a statistical model of interaction between uncoupled resonant modes.Mp can be assessed on assembled structures and improves the reliability ofCS as an indicator of strength of coupling between SEA subsystems.