An Analysis of Cylindrical Tank of Elastic Foundation by Transfer Matrix and Stiffness Matrix

전달행렬과 강성행렬에 의한 탄성지반상의 원형탱크해석

  • Published : 1997.03.01

Abstract

Even though there are many analysis methods of circular tanks on elastic foundation, the finite element method is widely used for that purpose. But the finite element method requires a number of memory spaces, computation time to solve large stiffness equations. In this study many the simplified methods(Analogy of Beam on Elastic Foundation, Foundation Stiffness Matrix, Finite Element Method and Transfer Matrix Method) are applied to analyze a circular tank on elastic foundation. By the given analysis methods, BEF analogy and foundation matrix method, the circular tank was transformed into the skeletonized frame structure. The frame structure was divided into several finite elements. The stiffness matrix of a finite element is related with the transfer matrix of the element. Thus, the transfer matrix of each finite element utilized the transfer matrix method to simplify the analysis of the tank. There were no significant difference in the results of two methods, the finite element method and the transfer matrix method. The transfer method applied to a circular tank on elastic foundation resulted in four simultaneous equations to solve completely.

탄성지반상의 원형탱크해석에는 여러방법이 있지만 최근에 널리 사용되는 방법은 유한요소법이다. 그러나 이 방법은 탄성지반상의 탱크해석시 많은 절점수가 필요하게 된다. 이것은 곧 많은 계산기 기억용량 및 계산시간 뿐만 아니라 노력이 필요하게 된다. 본 연구에서는 유사탄성지반보(Analogy of Beam on Elastic Foundation) 및 지반강성행렬(Foundation Stiffness Matrix)을 이용하여 축대칭하중을 받는 축대칭탱크를 뼈대 구조화 할 수 있었다. 또한 이 뼈대 구조를 유한요소로 분할하고, 각 요소 강성행렬(Stiffness Matrix)을 전달행렬(Transfer Matrix)로 전환하여 전달행렬법으로 원형탱크를 해석 할 수 있었다. 유한요소법과 전달행렬법을 탄성지반상의 원형탱크 해석에 적용한 결과 두 해석결과의 차이는 없고, 전달행렬법을 적용한 경우 최종 연립방정식수가 4개로 간략화 되었다.

Keywords

References

  1. Beams on Elastic Foundation Hetenyi, M.
  2. Circular Storage Tanks and Silos Ghali, A.
  3. Journal of AIAA v.1 no.10 Analysos of Axisymmetrical Shells by Direct Stiffness Method Grafton, P. E.;Strome, D. R.
  4. International Journal of the Solids Structures v.1 Plates and Tanks on Elastic Foundation in Application of Finite Element Method Cheng, Y. K.;Zienkiewicz, O. C.
  5. International Journal of Computers and Structures v.34 no.2 BEF Analogy For Axisymmetrically Loaded Cylindrical Shells Francis Tin-Loi;Victor A. Pulmano;David Thambiratnam
  6. 경상대학교 부속생산기술연구소 논문집 v.9 전달행렬에 의한 축대칭하중을 받는 저장탱크의 단순해석 남문희;강종수;윤한규;하대환
  7. Structural Engineering and Construction A Simple Analysis of Axisymmetrically Loaded Circular Cylindrical Tanks Resting on Elastic Foundation Nam, M. H.;Pulmano, V. A.;Tin Loi, F.
  8. 경상대학교 박사학위 논문 유사탄성지반보를 이용한 축대칭 변단면 원통형 탱크의 해석 강종수
  9. Matrix Methods of Structural Analysis Livesley, R. K.
  10. Proceedings of the Second Asian-Pacific Conference on Computational Mechanics Simple Analysis of Axisymmetrically Loaded Axisymmetrical Shell by Transfer matrix Joe, H. Y.;Nam, M. H.;Kang, J. S.;Ha, D. H.
  11. 경상대학교 박사학위논문 전달행렬에 의한 탄성지반상의 원형탱크해석 하대환