Structural Engineering and Mechanics

  • 제25권2호
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  • Pages.181-200
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  • 2007
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A decoupling FEM for simulating near-field wave motion in two-phase media

  • Chen, S.L. (College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Liao, Z.P. (Institute of Engineering Mechanics, China Seismological Bureau) ;
  • Chen, J. (The State Key Laboratory of Vibration, Shock & Noise, Shanghai Jiao Tong University)
  • 투고 : 2004.11.16
  • 심사 : 2006.08.14
  • 발행 : 2007.01.30
⟨ 이전 논문 다음 논문 ⟩

초록

A decoupling technique for simulating near-field wave motions in two-phase media is introduced in this paper. First, an equivalent but direct weighted residual method is presented in this paper to solve boundary value problems more explicitly. We applied the Green's theorem for integration by parts on the equivalent integral statement of the field governing equations and then introduced the Neumann conditions directly. Using this method and considering the precision requirement in wave motion simulation, a lumped-mass FEM for two-phase media with clear physical concepts and convenient implementation is derived. Then, considering the innate attenuation character of the wave in two-phase media, an attenuation parameter is introduced into Liao's Multi-Transmitting Formula (MTF) to simulate the attenuating outgoing wave in two-phase media. At last, two numerical experiments are presented and the numerical results are compared with the analytical ones demonstrating that the lumped-mass FEM and the generalized MTF introduced in this paper have good precision.

키워드

과제정보

연구 과제 주관 기관 : Natural Science Foundation of China

참고문헌

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