Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Interactions of Spherical Acoustic Shock Waves with a Spherical Elastic Shell near a Free-Surface

자유표면 근처에서의 구형 셸과 충격파의 비정상 유체-구조물 상호작용 해석

  • 이민형 (세종대학교 기계항공우주공학부) ;
  • 이범헌 (서강대학교 대학원 기계공학과) ;
  • 이승엽 (서강대학교 기계공학과)
  • Published : 2002.06.01
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Abstract

This paper analyses the transient response of a spherical elastic shell located near fee surface and impinged by spherical step-exponential acoustic shock waves. The problem is solved through extension of a method (Huang, 1969) previously formulated for the excitation in an infinite domain, which employs the classical separation of variables, series solutions, and Laplace transform technique The effect of the free surface reflection is taken into account using the image source method. The reflection of the incident wave has been treated by the same image formulation. If the reflection of the pressure field scattered and radiated by the shell is considered, the problem becomes that of multiple scattering by two spheres. However, this is in general negligible considering errors inherent from other sources and that the scattered and radiated pressure waves emanating from the shell are small. Thus, the problem is reduced to that of a structure immersed in an infinite fluid and impinged upon the origin and the image incident.

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References

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