Structural intensity of cylindrical shell structure under dynamic loading

被引：0
|
作者：
Wang, D. F. [1 ]
He, P. F. [1 ]
Liu, Z. S. [1 ]
机构：
[1] Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China
来源：
ISISS 2005: Innovation & Sustainability of Structures, Vol 1-3 | 2005年
关键词：
structural intensity cylindrical shell; vibration noise; SI vector; SI streamlines;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The vibro-acoustic interior noise of cylindrical shell is normally controlled by the shell surface power flow. The interior noise can be attenuated by redirecting the power flow of the surface. Structural intensity (SI) is the power flow per unit cross-sectional area in elastic media and it is analogous to acoustic intensity in a fluid medium due to structural vibration. Structural intensity occurs as a result of vibration and dynamic loading. In this study, the theoretical expression of structural intensity in cylindrical shell is derived according to the Flugee's thin shell theory and energy balance concept of the structure. From the structural intensity vector and novel streamlines presentation, the energy flow path, the energy flow sources and sinks can be identified. As an example, the structural intensity of circular cylindrical shell under dynamic ring loading is given and the structural intensity vector and streamline are obtained which can be used to identify the vibro-acoustic interior noise source, sink and predominated panels of fuselage structure.
引用
收藏
页码：1340 / 1349
页数：10
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