Paper Title:
Element Grouping Method for the Calculation of Dynamic Response and Acoustic Radiation from an Underwater Structure
  Abstract

A modification of traditional FEM/BEM called element grouping method (EGM) is proposed to calculate the elastic vibration and acoustic field radiated from an underwater structure. Instead of rebuilding the structure using coarse FEs to save the computational time and data storage, the structural FEs on the coupled surface are grouped into clusters of BEs to reduce the number of fluid DOF. With the grouped elements (GEs) used as BEs, the problem of non-matching between fluid DOFs and structural DOFs is solved. The approach is illustrated and validated using known analytic solutions for submerged spherical shells subjected to uniformly applied incident pressure. Acoustic radiated from a ribbed cylindrical shell driven by a force is predicted by using different element grouping styles. Comparison between numerical and experimental results shows that fine grouped elements give a high computation efficiency and more efficient data storage saving.

  Info
Periodical
Chapter
Chapter 1: Vibration Engineering
Edited by
Paul P. Lin and Chunliang Zhang
Pages
189-195
DOI
10.4028/www.scientific.net/AMM.105-107.189
Citation
G. Ji, Q. D. Zhou, C. W. Huang, "Element Grouping Method for the Calculation of Dynamic Response and Acoustic Radiation from an Underwater Structure", Applied Mechanics and Materials, Vols. 105-107, pp. 189-195, 2012
Online since
September 2011
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Price
$32.00
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