Inter-Modal Couplings between Two Sea Subsystems with an Arbitrary Interface

Inter-Modal Couplings between Two Sea Subsystems with an Arbitrary Interface
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具有任意接口的两个海洋子系统之间的多式联运

DOI:
10.4028/www.scientific.net/amm.130-134.824
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发表时间:
2011-10
期刊:
Advanced Materials Research
影响因子:
--
通讯作者:
黄震宇
黄震宇
中科院分区:
其他
文献类型:
--
作者:
纪琳;黄震宇

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介绍了一种简单的方法来估计通过任意界面连接的两个统计能量分析(SEA)子系统的模态间耦合关系。基于子系统模态法,推导了一般组合系统的动态刚度矩阵。任何一对子系统模式之间的耦合刚度项,然后可以确定在显式表达式。在适当的SEA条件下,例如每个子系统具有较高的模态密度,并且SEA子系统之间的耦合足够弱,这些模态间耦合刚度表达式可以大大简化。然后,结果可以很容易地容纳在标准的SEA建模过程中,以简单的方式预测通用组合系统的SEA响应。理论上的应用,以估计SEA耦合损耗因子之间的两个子系统连接的两个刚性点。
A simple technique is introduced to estimate the inter-modal coupling relations of two Statistical Energy Analysis (SEA) subsystems connected via an arbitrary interface. Based on a subsystem modal approach, the dynamic stiffness matrix of a generic built-up system is derived analytically. The coupling stiffness terms between any pair of subsystem modes can then be determined in explicit expressions. Under the proper SEA conditions, e.g. each subsystem has a high modal density and the couplings between SEA subsystems are sufficiently weak, these inter-modal coupling stiffness expressions can be greatly simplified. The results can then be easily accommodated within the standard SEA modeling procedure to predict the SEA response of generic built-up systems in a simple manner. Theoretical applications are made to estimate the SEA coupling loss factors between two subsystems connected by two rigid points.
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