Fluid-Structural Coupling Of A Plate-Ended Cylindrical Shell: Vibration And Internal Sound Field
Fluid-Structural Coupling Of A Plate-Ended Cylindrical Shell: Vibration And Internal Sound Field
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DOI：
10.1006/jsvi.1994.1299
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发表时间：
1994-07
影响因子：
4.7
通讯作者：
Li Cheng
中科院分区：
文献类型：
--
作者：
Li Cheng
摘要 本文提出了板端圆柱壳向其封闭腔体辐射声音的理论研究。在先前建立的自由振动模型的基础上，开发了考虑子系统（板、壳和腔）之间完全耦合的通用公式。通过使用人造弹簧系统，该公式允许以系统的方式考虑各种边界条件和壳板接头条件。给出了结构振动和空腔内产生的声场的数值结果。这些结果旨在研究两个主要问题：（1）深入了解耦合现象，这是理解板与壳之间的机械能传递以及从结构到声介质的机械-声能传递机制的关键因素； (2)说明通过改变壳板连接条件进行隔音的可能性和局限性。所建立的模型被认为在涉及板端壳体结构的工业应用中非常有用，特别是在飞机结构和含有流体的工业容器建模的情况下。
Abstract This paper presents a theoretical study of a plate-ended circular cylindrical shell radiating sound into its enclosed cavity. On the basis of a previously established free vibration model, a general formulation considering the full coupling between the subsystems (plate, shell and cavity) is developed. By using an artificial spring system, this formulation allows, in a systematic way, the consideration of a wide variety of boundary conditions and shell-plate joint conditions. Numerical results on the structure vibration and the generated sound field inside the cavity are presented. These results are intended to investigate two main issues: (1) obtaining a deep understanding of the coupling phenomena, which is a key factor to understand the mechanism of the mechanical energy transfer between the plate and the shell and mechanical-acoustical energy transfer from the structure to the acoustic medium; (2) illustrating the possibilities and limitations of sound-proofing by changing shell-plate joint conditions. The established model is believed to be useful in industrial applications where plate-ended shell structures are involved, especially in the case of the modelling of aircraft structures and fluid-containing industrial vessels.