• Title/Summary/Keyword: MSC NASTRAN

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A Basic Structural Design for large Floating Crane (대형 해상크레인의 구조 기본 설계)

  • PARK CHAN-HU;KIM BYUNG-WOO;HA MUN-KEUN;CHUN MIN-SUNG
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2004.05a
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    • pp.42-47
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    • 2004
  • This paper describes basic structural design for the large floating crane barge of fixed undulation type. Structural analysis is performed to divide two parts because crane barge is composed two parts, crane part of jib boom back stay and back tower and barge part to support crane part. The structural strength for jib boom structure members are in compliance with JIS B 8821 and scantling of all barge structural members are in compliance with the requirement of KR (Korean Register of Shipping) Steel Barges and Rules for Classification of Steel Ships. For the structural analysis of large floating crane, MSC/NASTRAN & MSC/PATRAN software is used.

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Characteristic Tests for 800kV Class Spacer (800kV급 스페이서의 특성시험)

  • Chong, J.K.;Song, K.D.;Chang, K.C.;Park, K.Y.;Shin, T.J.
    • Proceedings of the KIEE Conference
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    • 1996.07a
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    • pp.65-67
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    • 1996
  • The spacer is solid insulator which supports main conductor in GIS and seperates gas area. The 800kV spacer was designed and manufactured considering the results of electrical and structural analysis using commercial package MSC/NASTRAN. Temperature test and water pressure test were carries out, and the results from water pressure test were compared with the calculated ones from MSC/NSATRAN.

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Tool Holder Design for Measurement of Cutting Force in Diamond Turning Process (다이아몬드 터닝 가공의 미세절삭력 측정을 위한 Tool Holder 설계)

  • 정상화;김상석;도철진;홍권희;김건희
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2000.11a
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    • pp.68-71
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    • 2000
  • A tool holder system has been designed to measure cutting forces in diamond turning. This system includes a 3-component piezo-electric tranducer. In this research, tool holder system is modeled by considering the element dividing, material properties, and boundary conditions using MSC/PATRAN. Mode and frequency analysis of structure is simulated by MSC/NASTRAN, for the purpose of developing the effective design. In addition, tool holder system is verified by vibration test using accelerometer. This system will aid to the development of Fast Tool Servo.

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Transonic/Supersonic Flutter Analysis of a Fighter Wing with Tip-Store (끝단 장착물이 있는 항공기 날개의 천음속/초음속 플러터 해석)

  • Kim, Dong-Hyun;Lee, In
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.06a
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    • pp.1198-1203
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    • 2000
  • In this study, a nonlinear aeroelastic analysis system for the fighter wing with tip-store has been developed additionally in the transonic and supersonic flow region. The unsteady CFD code based on the transonic small disturbance theory has been incorporated to consider the numerical capability for the aerodynamic nonlinear effects. The coupled time-integration method is used to observe the detailed nonlinear aeroelastic responses for elastic wings in their flight. condition. A conservative wing-box model of a fighter wing with tip-store is modeled by MSC/PATRAN and the corresponding free vibration analysis has been performed by MSC/NASTRAN. The results of flutter analyses are presented in the subsonic, transonic and supersonic flow regime.

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Finite element modeling and dynamic characteristic analysis of the tilting turret slide system (틸팅터릿 이송시스템의 유한요소 모델링 및 동특성 해석)

  • 정상화;김상석
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2000.10a
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    • pp.188-192
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    • 2000
  • In multi-purpose lathe, the design of tilting turret slide system has an important and critical role to enhance accuracy of the machining process. Tilting turret unit is traveled by 3-axis slide systems. There is a need to design this part very carefully. In this research, 3-axis sliding system with tilting turret is modeled by considering the element dividing, material properties, and boundary conditions using MSC/PATRAN. Mode and frequency analysis of each structures such as saddle, careg, and turret are simulated by MSC/NASTRAN, for the purpose of developing the effective design. The results of mode analysis and frequency analysis are visualized with PATRAN, and the mothod which can solve the resornance problem by eigenvalues and eigenvectors of each axe is developed as well.

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A Study on the Multiaxial Fatigue Analysis of Bogie Frame for High Speed Train (고속전철용 대차프레임의 다축피로해석에 관한 연구)

  • 이상록;이학주;한승우;강재윤
    • Proceedings of the KSR Conference
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    • 1999.05a
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    • pp.344-351
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    • 1999
  • Stress analysis of bogie frame by using the finite element method has been performed for the various loading conditions according to the UIC (International Union of Railways) Code 615-4. Multiaxial fatigue damage models such as signed von Mises method and typical critical plane theories were reviewed, and multiaxial fatigue analysis program (MUFAP) has been developed. Fatigue analysis of bogie frame under multiaxial loading was performed by using MUFAP and finite element analysis results. The procedure developed in this study is considered to be useful for the life prediction in preliminary design stage of railway components under multiaxial loading conditions. 3-dimensional surface modeling, mesh generation and finite element analysis were performed by Pro-Engineer, MSC/PATRAN and MSC/NASTRAN, respectively, which were installed in engineering workstation.

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A Study on the Fatigue Analysis of Bogie Frame under Multiaxial Loading (다축하중을 받는 대차프레임의 피로해석에 관한 연구)

  • 이상록;이학주;한승우;김경식
    • Proceedings of the KSR Conference
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    • 1998.05a
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    • pp.330-337
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    • 1998
  • Bogie is mainly consisted of the bogie frame, suspensions, wheels and axles, braking system, and transmission system. The complex shapes of the bogie frame and the multiaxial loading condition induced in real operation make it difficult to design the bogie frame against the fatigue. In this study, multiaxial fatigue criteria were reviewed. Stress analysis of the bogie frame has been performed for the various loading conditions according to the UIC Code 615-4. Magnitudes of the stress amplitude and mean stress were estimated based on the stress analysis results to simulate the operating loads encountered in service. Fatigue strength of the bogie frame was evaluated by using the constant life diagram of the material. 3-D surface model ling, finite element meshing, and finite element analysis were performed by Pro-Engineer, MSC/PATRAN, and MSC/NASTRAN, respectively.

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A Basic Structural Design for Large Floating Crane (대형 해상크레인의 구조 기본 설계)

  • PARK CHAN-HU;KIM BYUNG-WOO;HA MUN-KEUN;CHUN MIN-SUNG
    • Journal of Ocean Engineering and Technology
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    • v.19 no.1 s.62
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    • pp.71-76
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    • 2005
  • This paper describes basic structural design for the large floating crane barge of fixed undulation type. Structural analysis was performed separately after dividing the floating crane into two parts, The crane part was composed of jib boom, back stay and back tower and the barge part supported the crane part. The structural strength for jib boom structural members are in compliance with JIS B 8821 and scantling of all barge structural members are in compliance with the requirement of KR (Korean Register of Shipping) Steel Barges and Rules for Classification of Steel Ships. For the structural analysis of large floating crane, MSC/NASTRAN and MSC/PATRAN software were used.

Damping Analysis of Composite Plates with Zig-Zag Triangular Element (지그재그 삼각형 유한요소를 이용한 복합재료판의 Damping해석)

  • 이덕규
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2001.05a
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    • pp.5-8
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    • 2001
  • A three node flat triangular element incorporating Layerwise Zig-Zag Theory(HZZT) is developed suitable for analyzing damped laminated composite structures. Using an interdependent kinematic relation, the higher order shear rotations are replaced by in-plane displacements, a transverse displacement and section rotations, which result in three translations and two rotations. Natural frequencies and modal loss factors of cantilevered laminated plates with embedded damping layers are calculated with the zig-zag triangular element and compared to the experimental results and MSC/NASTRAN results using a layered combination of plate and solid elements.

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Vibration Analysis of Composite Satellite Antenna by Acoustic Excitation (음향 가진에 의한 위성 안테나의 진동해석)

  • ;;;;;Horst Stockburger
    • Proceedings of the Korean Society For Composite Materials Conference
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    • 2002.05a
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    • pp.123-126
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    • 2002
  • Acoustic vibration analysis has been performed using random vibration analysis module of MSC/NASTRAN to evaluate the safety of the composite satellite antenna structure under the acoustic pressure from the launch vehicle. It was found that maximum $3\sigma$ stress by acoustic excitation was less than allowable stress.

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