• Title/Summary/Keyword: Structural Analysis

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Structural Analysis for Thickness Minimization Design of a Bileaflet Mechanical Heart (기계식 인공심장판막의 경량화 설계를 위한 구조해석)

  • 권영주
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2001.04a
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    • pp.643-646
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    • 2001
  • This paper investigates the structural analysis and design of mechanical heart valve through the numerical analysis methodology. In a numerical analysis methodology application to the thickness minimization structural design of mechanical heart valve, structural analysis is performed for the blood flow through a bileaflet mechanical heart valve. The structural static analysis is carried out to confirm the thickness minimization structural condition (minimum thickness shape of leaflet).

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A Study on the New Method for Structural Analysis and Design by MDO(Multidisciplinary Design Optimization) Methodology : Application to Structural Design of Flap Drive System (MDO기법에 의한 새로운 구조해석 및 설계기법 고찰: 플랩 구동장치의 구조설계에의 적용)

  • 권영주;방혜철
    • Korean Journal of Computational Design and Engineering
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    • v.5 no.2
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    • pp.184-195
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    • 2000
  • MDO (Multidisciplinary Design Optimization) methodology is an emerging new technology to solve a complicate structural analysis and design problem with a large number of design variables and constraints. In this paper MDO methodology is adopted through the use of computer aided systems such as Geometric Solid Modeller, Mesh Generator, CAD system and CAE system. And this paper introduces MDO methodology as a new method for structural analysis and design through the application to the structural design of flap drive system. In a MDO methodology application to the structural design of flap drive system, kinetodynamic analysis is done using a simple aerodynamic analysis model for the air flow over the flap surface instead of difficult aerodynamic analysis. Simultaneously the structural static analysis is done to obtain the optimum structural condition. And the structural buckling analysis for push pull rod is also done to confirm the optimum structural condition (optimum cross section shape of push pull rod).

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Structural Analysis on the Leaflet Motion Interacted with Blood Flow for Thickness Minimization Design of a Bileaflet Mechanical Heart Valve (기계식 인공심장판막의 경량화 구조설계를 위한 혈액유동과 상호작용하는 판막거동의 구조역학적 특성연구)

  • 권영주;방혜철;김창녕
    • Korean Journal of Computational Design and Engineering
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    • v.6 no.1
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    • pp.59-68
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    • 2001
  • This paper investigates the structural analysis and design of mechanical heart valve through the numerical analysis methodology. In a numerical analysis methodology application to the thickness minimization structural design of mechanical heart valve, fluid analysis is performed for the blood flow through a bileaflet mechanical heart valve. Simultaneously the kinetodynamic analysis is carried out to obtain the appropriate structural condition for the structural analysis. Thereafter the structural static analysis is also carried out to confirm the thickness minimization structural condition(minimum thickness shape of leaflet).

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Thickness Effect on the Structural Durability of a Bileaflet Mechanical Heart Valve

  • Kwon, Young-Joo
    • International Journal of Precision Engineering and Manufacturing
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    • v.4 no.4
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    • pp.5-12
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    • 2003
  • This paper discusses about the thickness effects on the structural durability of a bileaflet mechanical heart valve (MHV). In the study on the design and the mechanical characteristics of a bileaflet mechanical heart valve, the fluid mechanics analysis on the blood flow passing through leaflets, the kinetodynamics analysis on the rigid body motion of the leaflet induced by the pulsatile blood flow, and the structural mechanics analysis for the deformed leaflet are required sequentially and simultaneously. Fluid forces computed in the fluid mechanics analysis on the blood flow are used in the kinetodynamics analysis for the leaflet motion. Thereafter, the structural mechanics analysis for the deformed leaflet follows to predict the structural strength variation of the leaflet as the leaflet thickness changes. Analysis results show that structural deformations and stresses increase as the fluid pressure increases and the leaflet thickness decreases. Analysis results also show that the leaflet becomes structurally weaker and weaker as the leaflet becomes thinner and thinner.

Resisting capacity of Korean traditional wooden structural systems subjected to static loading

  • Hwang, Jong-Kook;Kwak, Samuel;Kwak, Ji-Hyun
    • Structural Engineering and Mechanics
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    • v.30 no.3
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    • pp.297-316
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    • 2008
  • This paper investigates the structural behavior of Korean traditional wooden structures on the basis of the structural analysis using the commercialized program, SAP 2000. All the structural systems were analyzed, and the rotational stiffness at each joint was inferred from the experimental result for a half scale model of Bongjeong-sa (a temple in South Korea). In addition, the artificial control of analysis parameters was prevented because the structural analysis was focused on the realization of the most exact structural behavior of real structures. The analysis was carried out for the horizontal and vertical static loads, and all the secondary members were excluded in the structural analysis. The obtained results show that the resisting capacity of the primary structural system is greater than that of the expanding structural system.

Structural Analysis of Plate Structures by Transfer of Stiffness Coefficient (강성계수의 전달에 의한 평판 구조물의 구조해석)

  • Choi, Myung-Soo
    • Journal of Power System Engineering
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    • v.11 no.1
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    • pp.92-97
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    • 2007
  • It is important to compute the structural analysis of plate structures in structural design. In this paper, the author uses the finite element-transfer stiffness coefficient method (FE-TSCM) for the structural analysis of plate structures. The FE-TSCM is based on the concept of the successive transmission of the transfer stiffness coefficient method and the modeling technique of the finite element method (FEM). The algorithm for in-plane structural analysis of a rectangular plate structure is formulated by using the FE-TSCM. In order to confirm the validity of the FE-TSCM for structural analysis of plate structures, two numerical examples for the in-plane structural analysis of a plate with triangular elements and the bending structural analysis of a plate with rectangular elements are computed. The results of the FE-TSCM are compared with those of the FEM on a personal computer.

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Structural Analysis of RIROB(Reactor Inspection Robot) (원자로용 수중탐상기의 구조해석)

  • 최석호;권영주;김재희
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1997.10a
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    • pp.613-616
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    • 1997
  • MDO(Multidisciplinary Design Optimization) methodology is an emerging new technology to solve a complicate structural analysis and design problem with a number of design variables and constraints. In this paper MDO methodology is adopted through the use of computer aided engineering(CAE) system. And this paper treats the structural design problem of RIROB(Reactor Inspection Robot) through the application of MDO methodology. In a MDO methodology application to the structural design of RIBOS, kinetodynamic analysis is done using a simple fluiddynamic analysis model for the warter flow over the sensor support surface instead of difficult fluid dynamic analysis. Simultaneously the structural static analysis is done to obtain the optimum structural condition. The minimum thickness (0.8cm) of the RIROB housing is obtained for the safe design of RIROB. The kinetodynamic analysis of RIROB. The kinetodynamic analysis of RIROB is done using ADAMS and the static structural analysis of RIROB is done using NISA.

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A Study on Simplified Analysis and Estimation Method for Evaluation of Structural Safety in Modular Underground Arch Structure (모듈러 지중아치 구조 안전성 검토를 위한 간략 해석 및 평가방법에 관한 연구)

  • Kwon, Tae-Yun;Cho, Kwang-Il;Lee, Wong-Hong;Ahn, Jin-Hee
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.26 no.3
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    • pp.55-63
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    • 2022
  • A modular underground arch structure using steel and concrete has been proposed as a structure that has a simple construction process and can effectively resist cross-sectional forces generated during construction and use. Structural behavior of modular underground arch was evaluated about span length less than 15m through 3D structural analysis and test. In general, 2D and 3D structural analysis methods may be applied for structural analysis such as underground arch and tunnels. However, if a 2D or 3D structural analysis method is applied to evaluate the structural safety of a modular underground arch structure, it is difficult to model for structural analysis and it may take an excessively long time to interpret. Therefore, it may not be reasonable as a structural analysis method for considering the structural safety and earth pressure in the design process of a modular underground arch structure. In addition, when a modular underground arch structure is configured for span lengths to which the predetermined cross-section is applicable, it may be reasonable to evaluate only the safety of the structure and cross-section according to the cross-section and load conditions. Therefore, in this study, a structural analysis model using frame elements was proposed for efficient structural safety evaluation. In addition, structural analysis results of the 2D structural analysis model and the simplified analysis model using frame elements were compared, and the structural safety of the modular underground arch structure for a span length of 20m was evaluated with a simplified analysis method.

Application of Object-Oriented Methodology for Structural Analysis and Design (구조해석에서 객체지향 방법론의 도입)

  • 이주영;김홍국;이병해
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 1995.04a
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    • pp.160-169
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    • 1995
  • This study presents an application of object-oriented methodology for structural dcsign process. A prototype system of integrated a structural design system is developed by introducing a structural analysis object model(SAOM) and structural design object model(SDOM). The SAOM module. which is modeled as a part of structural member, performs structural analysis using FEM approach and the SDOM module checks structural members based on Korea steel design standard. Above mentionedmodelsareabstraclencapsulatibleandreusable.

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Structural Design and Analysis of Sandwich Composite Structure for Floor Board Structure (샌드위치 복합재 바닥 구조물의 구조 설계 및 해석)

  • Park, Hyunbum
    • Journal of Aerospace System Engineering
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    • v.11 no.6
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    • pp.64-67
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    • 2017
  • This work dealt with structural safety analysis about sandwich composite structure of automotive floor board. In this work, structural design and analysis of sandwich composite structure for automobile floor board were performed. Firstly, structural design requirement of automobile floor board was investigated. After structural design, the structural analysis of the automobile floor board were performed by the finite element analysis method. It was performed that the stress and displacement analysis at the applied load condition. After structural test of target structure, structural test results were compared with analysis results. Through the structural analysis, it was confirmed that the designed floor board structure is safety.