标题:Sound power radiation from a vibrating structure in terms of structure-dependent radiation modes
作者:Ji, Lin ;Bolton, J. Stuart
作者机构:[Ji, Lin ] School of Mechanical Engineering, Shandong University, Jinan; 250062, China;[Bolton, J. Stuart ] Ray W. Herrick Laboratories, School of Mec 更多
会议名称:21st International Congress on Sound and Vibration 2014, ICSV 2014
会议日期:13 July 2014 through 17 July 2014
来源:21st International Congress on Sound and Vibration 2014, ICSV 2014
出版年:2014
卷:1
页码:174-181
摘要:A new technique for describing the sound power radiation from a vibrating structure is introduced that is based on a set of uncoupled, structure-dependent radiation modes (s-modes). These modes differ from conventional acoustic radiation modes (a-modes) since s-modes are determined by not only the radiation resistance matrix of the structure but also its structural vibration modes. In principle, s-modes are found to possess two significant advantages over a-modes: (1) the number of s-modes required to describe the radiated sound power from a vibrating structure is usually smaller than that of a-modes, especially in the higher frequency range where many vibration modes contribute to the structural vibration; (2) the definition of s-modes establishes a direct connection between the structural modes or structural wave propagation and their sound radiation properties; consequently, the inherent relationship between the modal properties/wave propagation characteristics of the structure and its sound radiation properties can be revealed in a convenient and explicit manner. Two examples, featuring baffled, finite models, i.e., an Euler-beam (1-dimensional) and a thin plate (2-dimensional), are employed to illustrate the main theoretical results of the present study.
收录类别:EI;SCOPUS
资源类型:会议论文;期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922666673&partnerID=40&md5=8b4660b3d8f5b54745f73067c3790daa
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