Statistical energy analysis of periodically stiffened damped plate structures
Statistical energy analysis of periodically stiffened damped plate structures
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DOI：
10.1006/jsvi.1997.1150
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发表时间：
1997-12
影响因子：
4.7
通讯作者：
R. Langley;J. Smith;F. Fahy
中科院分区：
文献类型：
--
作者：
R. Langley;J. Smith;F. Fahy
加筋板广泛应用于航空航天和船舶，通常需要预测这类结构的高频噪声和振动水平。目前的工作是在统计能量分析（SEA）的背景下，通过加劲板的高频振动传输建模。提出将面板建模为两个相邻结构构件之间的阻尼耦合单元，并根据周期结构理论计算其透射和吸收系数。将该方法应用于加筋板耦合的两块板的受力响应，并与(1)动刚度法得到的精确结果、(2)传统SEA法得到的结果和(3)波浪强度分析（WIA）得到的结果进行了比较。结果表明，该方法能产生准确的响应预测，与传统的SEA和WIA结果相比，有了显著的改进。先前的研究表明，周期性系统的振动传递对结构失序非常敏感，本研究包括对失序对加劲肋间距的影响的研究。
Stiffened panels are used widely in aerospace and marine vehicles, and it is often necessary to predict high frequency noise and vibration levels in structures of this type. The present work is concerned with modelling high frequency vibration transmission through a stiffened panel within the context of Statistical Energy Analysis (SEA). It is proposed that the panel can be modelled as a damped coupling element between two adjoining structural components, and the transmission and absorption coefficients calculated on the basis of periodic structure theory. The method is applied to the forced response of two panels which are coupled by a stiffened panel and a comparison is made with (i) exact results obtained by using the dynamic stiffness method, (ii) results yielded by a conventional SEA approach, and (iii) results yielded by wave intensity analysis (WIA). The method is found to yield accurate response predictions which are a significant improvement upon the conventional SEA and WIA results obtained for the example system. Previous work has shown that vibration transmission through a periodic system can be very sensitive to structural disorder, and the present study includes an investigation of the effects of disorder in the stiffener spacing.