• Title, Summary, Keyword: 유한대판법

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Coupled Buckling analysis of composite thin-walled beams using FSM (유한대판법을 이용한 복합재 박벽보의 연성좌굴해석)

  • Yoo, Sung-Hyun;Kim, Young-Fil;Lee, Jun-Seok;Kim, Moon-Young
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.492-495
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    • 2009
  • 본 논문에서는 유한대판법(Finite Strip Method, FSM)을 이용하여 복합재료로 구성된 박판구조물의 좌굴해석을 수행하였다. 유한대판법에서의 변위장은 정현곡선으로 구성된 X방향 성분과 여현곡선의 Y방향 성분으로 구성되어 있는 면내성분, 면외성분으로 횡방향으로 3차 다항식과 보 진동함수를 사용하여 구성되었다. 각 적층판의 강성을 두께방향으로 적분하여 전체 강성을 구하고 최소 포텐셜 에너지 이론을 사용하여 구한 평형방정식에 대입하여 전체 강성행렬을 구하였다. 자유도의 감소로 인한 해석시간의 단축, 입력자료 작성 및 출력이 쉬운 점들이 유한대판법을 이용한 좌굴해석의 장점이다.

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Stress Analysis of a Multi-Layered Cylindrical Shell Using Finite Strip Method (유한대판법을 이용한 다층 원통쉘의 응력해석)

  • Park, Sung-Jin;Yang, Su-Jin
    • Proceedings of the Korean Society of Disaster Information Conference
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    • pp.152-154
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    • 2015
  • 본 논문은 유한요소의 일종인 유한대판법(Finite Strip Method)를 사용하여 양단 단순지지된 3차원 다층 원통쉘의 내측과 외측에 받는 하중이 2층 구조(강재/콘크리트) 및 3층 구조(강재/콘크리트/강재)에 미치는 영향과 이종재료인 다층 원통쉘의 최적 상태에 대해 알아본다.

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FINITE STRIP ANALYSIS OF FOLDED LAMINATED COMPOSITE PLATES (유한대판법에 의한 복합적층절판의 해석)

  • Yoon, Seok Ho;Han, Sung Cheon;Chang, Suk Yoon
    • Journal of Korean Society of Steel Construction
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    • v.13 no.1
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    • pp.41-52
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    • 2001
  • In this paper the analysis of laminate composite folded plates with arbitrary angle connection like box girder is studied by finite strip method Total stiffness of laminated plate is obtained by integration of the stiffness in each layer or lamina through laminate thickness and total stiffness in each layer or lamina through laminate thickness and total tiffness matrix is obtained by substitutionto equilibrium equation derived from the minimum total potential energy theorem. The assumed displacement functions for a finite strip method in plate or box girder analysis are combinations of one-way polynomial functions in the transverse direction and harmonic functions in the span-wise direction. Finite strip method with the merits of the simplification in modeling and the reduction of analytical time is accurate in the analysis of laminate composite folded plates shaped like box firders.

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Geometrically Nonlinear Analysis of Plates Subjected to Uniaxial Compression by Finite Strip Method (일축(一軸) 압축(壓縮)을 받는 판(板)의 유한대판법(有限帶板法)에 의한 기하학적(幾何學的) 비선형(非線型) 해석(解析))

  • Lee, Yong Jae
    • Journal of The Korean Society of Civil Engineers
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    • v.5 no.3
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    • pp.107-115
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    • 1985
  • For the finite deflection analysis of plates with initial deflections subjected to uniaxial compression, the formulation of incremental finite strip method is made and has been incorporated into a computer program. A new in plane displacement function varying along the load: direction has been derived from the out-of-plane displacement function by considering the curvature of a plate. Either incremental load type analysis or incremental displacement type analysis may be selected to solve incremental equibrium equations in the program. The following results have been obtained: 1. Incremental displacement type analysis is superior to incremental load type analysis in that the former converges more rapidly than the latter. 2. The finite strip method using the new displacement function gives as accurate results as analytical method and other finite element methods.

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Dynamic Characteristics of Laminated Shells by Finite Strip Mehod (FSM에 의한 다층 원통쉘의 동적 특성에 관한 연구)

  • Park, Sungjin
    • Journal of the Society of Disaster Information
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    • v.11 no.4
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    • pp.534-541
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    • 2015
  • This study was presented how to interpret a laminated cylindrical shell having both ends supported condition are simple, and by identifying the three-dimensional stress characteristics. The governing equations were using the concept of finite element assuming the conversion into ordinary differential equations and partial differential equations by numerical analysis using the finite strip method. In particular, a function performed for the three-dimensional laminated cylindrical shell having a simple support condition were analyzed for the case composed of a specific function of the beam consisting of a trigonometric function. Layer material and layer thickness of a steel or concrete, the cylindrical length and the like by varying the parameters variously examine the effects of multi-layer cylindrical shell.

Local Deformation Analysis of the Orthotropic Steel Bridge Deck Due to Wheel Loadings Using FSM and FEM (윤하중에 의한 강바닥판 교면포장의 종방향균열 관련 수치해석법 개발)

  • Jeong, Jin Seok;Jung, Myung Rag;Ock, Chang Kwon;Lee, Won Tae;Kim, Moon Young
    • Journal of Korean Society of Steel Construction
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    • v.28 no.4
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    • pp.243-251
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    • 2016
  • Longitudinally structural cracks are sometimes observed in the pavement on steel plate deck bridges because traffic truck loadings can cause large local deformations of the thin deck plate stiffened by longitudinal and transverse beams. In this study, an improved finite strip method using flat-shell strip, prism, and link elements is presented to investigate local deformations of steel decks with pavements in which flexural and torsional stiffness effects of thin floor beams are rigorously taken into account. A simplified deck model extracted from steel plate-girder bridges is analyzed using the developed FSM and the commercial FE program, ABAQUS and also, their numerical results are compared and discussed.

Analysis of Shell Structures using the Spline Finite Strip Method (Spline 유한대판법을 사용한 쉘 구조물의 해석)

  • 최창근;홍현석
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.19-26
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    • 1998
  • The isoparametric spline finite strip method for degenerated shells is presented. In the formulation, both the geometry and the displacement field are represented by uniform cubic B-spline curves. Spline shell strip is degenerated stress-resultant shell with 6 dof at each node;and the penalty function method is used to incorporated the six dof,

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Analysis of Stiffened Plate by Finite Strip Method (유한대판법(有限帶板法)에 의한 보강(補强)된 평판(平板)의 해석(解析))

  • S.J.,Yim;B.W.,Park
    • Bulletin of the Society of Naval Architects of Korea
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    • v.16 no.3
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    • pp.1-8
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    • 1979
  • Various approaches to the analysis of stiffened plating in ship structures have been proposed by a number of researchers. Among them, the finite element method is known to be the most powerful method. However, for many parts of ship's structure having simple geometry and boundary conditions, the F.E.M. is often extravagant and unnecessary. In this paper, the authors have attempted to introduce the finite strip method which was proposed by Y.K. Cheung to avoid the difficulties involved in F.E.M. The results of calculations on the displacements and stresses in various plates with or without stiffeners were satisfactory, which shows the F.S.M. is useful for structural analysis of ship's plating.

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Analysis of the Steel Deck Bridges using the Finite Strip Method (유한대판법을 사용한 강상판 교량의 해석)

  • 최창근;홍현석
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.77-84
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    • 1998
  • The finite strip method is presented for the analysis of steel deck bridges. Like the Pelikan-Esslinger design method for the steel deck bridges, steel deck is treated as an equivalent orthotropic plate. In the presented method, the deck is discretised by finite strips in the longitudinal direction and the effect of main girder or floor beam deflection can also be accounted for. In this method, the terms of harmonic series at elastically support such as transverse floor or diaphragm in steel deck become coupled. Solutions of this method are compared with other available analytical and numerical solution, and good agreement is observed.

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Analysis of Shell Using the Spline Finite Strip with Drilling DOF (면내 회전을 갖는 SPLINE 유한대판 요소에 의한 쉘의 해석)

  • 최창근;홍현석
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.12 no.2
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    • pp.185-199
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    • 1999
  • 본 연구에서는 새로운 spline 유한대판 요소를 제안하였다. 제안된 정식화는 등매개 개념에 의해 기하학적 형상과 변위장을 가정함에 있어 길이방향은 3차의 B-spline 곡선으로, 횡방향에 대해서는 Lagrange 다항식에 의해 표현된다. 이 논문은 평판과 쉘해석에 있어서의 등매개 spline 유한대판 요소의 개선에 목적을 두고 있다. 이 새로운 요소는 스트립의 내부 절점에서 6개의 자유도를 갖는 합-응력 감절점 쉘 요소로부터 유도하였다. 스트립의 기하학적 형상은 강체 회전에 대한 정의에 위배되지 않고도 두께 방향을 따라 Jacobian이 일정하다는 가정을 따랐으며 고체역학에서 정의되는 면내 회전을 penalty 함수에 의한 구속조건으로 간주하여 면내 회전에 관계된 자유도를 생성하였다. 제안된 요소에 대하여 쉘의 전형적인 문제에 대한 수치예제를 보였으며 이 스트립 요소의 성능을 평가하였다.

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