Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Acoustic Interface Element on Nonconformal Finite Element Mesh for Fluid-Structure Interaction Problem

비적합 유한요소망에 적용가능한 유체-구조물 연결 요소

  • Cho, Jeong-Rae (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Jin Ho (Department of Ocean Engineering, Pukyong National University) ;
  • Cho, Keunhee (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Yoon, Hyejin (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 조정래 (한국건설기술연구원 구조연구본부) ;
  • 이진호 (부경대학교 해양공학과) ;
  • 조근희 (한국건설기술연구원 구조연구본부) ;
  • 윤혜진 (한국건설기술연구원 구조연구본부)
  • Received : 2023.03.23
  • Accepted : 2023.04.28
  • Published : 2023.07.01
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Abstract

In the fluid-structure interaction analysis, the finite element formulation is performed for the wave equation for dynamic fluid pressure, and the dynamic pressure is defined as a degree of freedom at the fluid nodes. Therefore, to connect the fluid to the structure, it is necessary to connect the degree of freedom of fluid dynamic pressure and the degree of freedom of structure displacement through an interface element derived from the relationship between dynamic pressure and displacement. The previously proposed fluid-structure interface elements use conformal finite element meshes in which the fluid and structure match. However, it is challenging to construct conformal meshes when complex models, such as water purification plants and wastewater treatment facilities, are models. Therefore, to increase modeling convenience, a method is required to model the fluid and structure domains by independent finite element meshes and then connect them. In this study, two fluid-structure interface elements, one based on constraints and the other based on the integration of nonsmooth functions, are proposed in nonconformal finite element meshes for structures and fluids, and their accuracy is verified.

Keywords

Acknowledgement

본 연구는 환경부 재원으로 환경시설 재난재해 대응기술개발사업의 지원을 받아 연구되었습니다. 이에 감사드립니다(2022002850001).

References

  1. Lee JH, Cho JR. Simplifid analysis of rectangular liquid storage tanks considering fluid-structure interaction. EESK J. Earthquake Eng. 2022 Sept;26(5):203-209. https://doi.org/10.5000/EESK.2022.26.5.203
  2. Cho JR, Yoon H, Lee JH. Interface element based on constraints for incompatible finite element meshes of solid and fluid. Proceedings of KSCE 2022 Convention; 2022 Oct 19-21; Busan, Korea.
  3. Cook RD. Concepts and applications of finite element analysis. John Wiley & Sons. c2007.
  4. Systemes D. Abaqus v6. 12 Documentation-ABAQUS analysis user's manual. Abaqus Inc. c2012.
  5. Park JH, Choo JF, and Cho JR. Dynamic soil-structure interaction analysis for complex soil profiles using unaligned mesh generation and nonlinear modeling approach. KSCE Journal of Civil Engineering. 2013 May;17(4):753-762. https://doi.org/10.1007/s12205-013-0135-1
  6. Zienkiewicz OC, Taylor RL. The finite element method; Fifth edition Volume 1: The Basis, Butterworth-heinemann, c2000.
  7. Lehoucq RB, Sorensen DC, Yang C. ARPACK users' guide: solution of large-scale eigenvalue problems with implicitly restarted Arnoldi methods. Society for Industrial and Applied Mathematics. c1998.