한국음향학회지 (The Journal of the Acoustical Society of Korea)

  • 제19권4호
  • /
  • Pages.84-92
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  • 2000
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  • 1225-4428(pISSN)
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  • 2287-3775(eISSN)
한국음향학회 (The Acoustical Society of Korea)
권호 표지

수중 산란체의 수치적 산란해석

Wave Scattering Analysis of Scatterers Submerged in Water by Using a Hybrid Numerical Approach

  • 발행 : 2000.05.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 유한요소와 무한요소를 사용하여 수중 산란체의 산란해석을 수행하였다. 무한영역을 유한영역으로 나누어 유한영역은 유한요소를 사용하여 모델링하고 무한/유한 영역의 경계면에서는 비반사조건을 만족시키기 위하여 무한요소를 사용하되 파동 특성이 가미된 IWEE(Infinite Wave Envelope Element)를 사용하였다. 수중 강체구의 산란해석에 유한요소의 차수, 크기 및 유한요소 모델 그리고 IWEE가 미치는 영향을 살펴보았다. 수치적 산란해석에서 인위적 반사를 줄이기 위해서는 유한요소와 IWEE의 연결을 유연하게 하기 위하여 유한요소는 잘게 나누거나 이차요소를 사용하는 것이 좋으며 IWEE에서는 고차를 사용하는 것이 바람직하다.

In this paper, numerical scattering analysis for submerged scatterers is performed using finite and infinite elements. Unbounded domain is truncated into finite domain and finite elements are used in the domain. Infinite elements, So called Infinite Wave Envelope Elements (IWEE) which possess wave-like behavior, are used to take into account the infinite domain on the truncated boundary Scattering from rigid sphere is taken as an example and the effects of the order and mesh size of finite elements, size of finite element model and the order of IWEE are investigated. Quadratic finite element, refined mesh and higher order IWEE are recommended to improve the non-reflection boundary condition in the numerical scattering analysis.

키워드

참고문헌

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