Paper Title:
Experimental Determination of SEA Parameters of Stiffened Cylindrical Shell Structure
  Abstract

A method to predict the modal density and radiation efficiency of orthogonally stiffened cylindrical shell is presented in this paper. The modal density is derived using energy method from the undamped natural frequencies of stiffened shell by treating the stiffeners as discrete elements. The band averaged radiation efficiency is estimated by categorizing the structural modes into acoustically fast and acoustically slow modes. The predicted parameters are compared with experimental results using laser vibrometer measurements. Phase-roll off has been observed in laser vibrometer measurements for which a correction procedure is applied. This prediction method can be easily extended to shells with stiffeners having different size, orientation etc.

  Info
Periodical
Edited by
J.M. Dulieu-Barton and S. Quinn
Pages
315-324
DOI
10.4028/www.scientific.net/AMM.3-4.315
Citation
P. Ramachandran, S. Narayanan, "Experimental Determination of SEA Parameters of Stiffened Cylindrical Shell Structure", Applied Mechanics and Materials, Vols. 3-4, pp. 315-324, 2005
Online since
August 2006
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