A new concept of modal participation factor for numerical instability in the dual BEM for exterior acoustics

J. T. Chen, K. H. Chen, I. L. Chen, L. W. Liu

研究成果: Article同行評審

36 引文 斯高帕斯(Scopus)

摘要

This paper presents the occurring mechanism why irregular frequencies are imbedded in the exterior acoustics using the dual boundary element method (BEM). The modal participation factor which dominates the numerical instability is derived for continuous and discrete systems. In addition, the irregular (fictitious) frequencies embedded in the singular or hypersingular integral equations are discussed, respectively. It is found that the irregular values depend on the kernels in the integral representation for the solution. A two-dimensional dual BEM program for the exterior acoustics was developed. Numerical experiments are conducted to verify the concept of modal participation factor.

原文English
頁(從 - 到)161-174
頁數14
期刊Mechanics Research Communications
30
發行號2
DOIs
出版狀態Published - 2003 三月

All Science Journal Classification (ASJC) codes

  • 土木與結構工程
  • 材料科學(全部)
  • 凝聚態物理學
  • 材料力學
  • 機械工業

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