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The University of Southampton
Southampton Marine and Maritime Institute

The structural-borne characteristics and acoustic-structure coupling model of typical marine structures Seminar

Time:
12:00 - 13:00
Date:
31 July 2014
Venue:
Boldrewood Campus Building 176 Room 2013

For more information regarding this seminar, please telephone Dr Yeping Xiong on +44(0)2380596619 or email y.p.xiong@soton.ac.uk .

Event details

Structural-borne sound theory focuses on structural dynamic research in view of sound waves.

Based on the structural acoustics theory, the acoustic-structure interaction model is applied to study the characteristics of vibrational energy flow and sound radiation. In the traditional fluid-structure coupling model, the fluid is regarded as incompressible and the effect of the fluid is equal to added mass. Otherwise, the fluid is regarded as compressible and sound waves exist, the sound pressure is taken as dynamic load applying in the structures in the acoustic-structure interaction model. Then the characteristics of structural dynamic and sound radiation can be studied through resolving the coupling system. This approach has been applied to: vibro-acoustic characteristics analysis of cylindrical shell submerged in the free sound field (without reflection), the critical load forecasting of underwater cylindrical shell based on the vibro-acoustic model, the vibro-acoustic characteristics analysis of complex coupling system (e.g. arbitrary thickness of damping layer, buried pipe, shells submerged in viscous fluid), the vibro-acoustic characteristics analysis of immersed or floated cylindrical shells with the existence of a free surface. Moreover, the vibrational energy flow models of the typical damage structures are established and structural damage identification methods are also presented with the visual graphs of the structural sound intensity of the damage structures demonstrated.

Speaker information

Prof Tian-Yun Li, Department of Naval Architectur and Ocean Engineering, Huazhong University of Science and Technology. Prof. Tian-Yun Li has been engaging in ship structural dynamics and acoustic-structure coupling research at Huazhong University of Science and Technology (HUST) since 1997 after obtaining PhD in Ship Structure Mechanics at HUST. He graduated in Shipbuilding Engineering of Harbin Engineering University in 1991. He is currently the dean of Department of Naval Architecture and Ocean Engineering, the Director of the Experimental Teaching Center at HUST. He is a member of the Academic Committee of the Ship of Chinese Society of Naval Architecture and Marine Engineering, member of Hubei Acoustic Society, member of Wuhan Shipbuilding Engineering Society, director of the Ocean Engineering (China), member of editorial board of Journal of Vibration Engineering and Chinese Journal of Ship Research. Prof. Li’s research interests cover structural dynamics of Naval Architecture and Ocean Engineering, acoustic-structure coupling system, power flow analysis in dynamic systems. Prof. Li has lead and completed many research projects, including four NSF projects in China. He has published more than one hundred papers on well-known journals, including Journal of Sound and Vibration, Composite Structures, Ocean Engineering, Thin-Walled Structures, Journal of the Acoustical Society of America, International Journal of Engineering Science.

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