• 제목/요약/키워드: structural integrity evaluation

검색결과 357건 처리시간 0.027초

동특성 분석을 통한 하우징의 구조건전성 평가 (The Evaluation of the Electronic Housing Structural Integrity Using Dynamic Analysis)

  • 이재은;최혜윤;김병준;이증;정오균
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2014년도 추계학술대회 논문집
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    • pp.54-59
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    • 2014
  • The rapid tactical operation and mobility are getting important to recently developed the guided weapon systems. And military wants multi-purposes equipment to carry the war more easily. So military wants to have the equipment that can apply without any distinction about environment. For this reason, the robust design is getting more important now to guarantee survivability of equipment. In this paper, we try to check about structural integrity of Fire Control Unit(FCU) which is one of the guided weapon system using dynamic FEM analysis.

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Segmental PC 박스거더교의 검증재하시험 및 건전성평가 (Proof Load Test and Integrity Assessment of Segmental PC Box-girder Bridges)

  • 조효남;임종권;옥승범;지광습
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1995년도 가을 학술발표회 논문집
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    • pp.132-141
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    • 1995
  • This study is intended to propose practical but systematic and rational approaches for proof load test and integrity assessment of segmental PC box-girder bridges. The proposed models cover the whole range of field tests and assessment of such as inspections, nondestructive tests, static and dynamic load tests, structural analysis, and integrity assessment for the evaluation of load carrying capacity, serviceability, and durability of PC box-girder bridges. They are applied to a newly constructed precast segmental PC box-girder bridge which is a part of the Seoul interior circuit elevated expressway.

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High Temperature Structural Integrity Evaluation Method and Application Studies by ASME-NH for the Next Generation Reactor Design

  • Koo, Gyeong-Hoi;Lee, Jae-Han
    • Journal of Mechanical Science and Technology
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    • 제20권12호
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    • pp.2061-2078
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    • 2006
  • The main purpose of this paper is to establish the high temperature structural integrity evaluating procedures for the next generation reactors, which are to be operated at over 500$^{\circ}C$ and for 60 years. To do this, comparison studies of the high temperature structural design codes and assessment procedures such as the ASME-NH (USA), RCC-MR (France), DDS (Japan), and R5 (UK) are carried out in view of the accumulated inelastic strain and the creep-fatigue damage evaluations. Also the application procedures of the ASME-NH rules with the actual thermal and structural analysis results are described in detail. To overcome the complexity and the engineering costs arising from a real application of the ASME-NH rules by hand, all the procedures established in this study such as the time-dependent primary stress limits, total accumulated creep ratcheting strain limits, and the creep-fatigue damage limits are computerized and implemented into the SIE ASME-NH program. Using this program, the selected high temperature structures subjected to two cycle types are evaluated and the parametric studies for the effects of the time step size, primary load, number of cycles, normal temperature for the creep damage evaluations and the effects of the load history on the creep ratcheting strain calculations are investigated.

음향방출기법을 응용한 플라스틱 쉘 구조물의 건전성 평가 연구 (Experimental Evaluation Study on the Integrity of Plastic Shell Structure using Acoustic Emission Technique)

  • 설창원;이기범
    • 한국항공우주학회지
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    • 제33권12호
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    • pp.39-47
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    • 2005
  • 본 연구에서는 고속 충격환경을 경험하는 플라스틱 구조 소재에 대한 인장속도별 물성 평가 시험 및 구조건전성 평가에 음향방출 기법을 적용하였다. 인장속도별 물성 평가시험을 통하여 플라스틱 소재 구조물의 건전성 평가에 유용한 음향방출 신호 특성 인자들을 획득하였다. 인장속도에 따른 인장강도는 저속 인장속도 구간에서는 속도가 증가함에 따라 강도가 증가하는 특성을 보여주었으나 일정 속도 영역 이상의 고속 인장시험에서는 인장속도 증가와 무관하게 일정한 강도 값을 나타내었다. 정적 압축 구조시험에서는 음향방출 기법을 적용함으로써 플라스틱 쉘 구조물의 균열발생 시점 및 위치 등을 정확히 평가할 수 있었다.

F-15 기체 전투손상 수리설계 및 평가기법 사례연구 (Case Study of F-15 Airframe Battle Damage Repair Design and Assessment Procedure)

  • 김종헌;주영식
    • 한국항공우주학회지
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    • 제37권1호
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    • pp.105-112
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    • 2009
  • 전투기가 임무수행중 기체에 발생할 수 있는 전투손상에 대처하기 위해 손상평가 및 수리설계, 구조건전성 평가방법 등 손상 후속절차를 연구하였다. 사례로서 F-15 ECS Bay에 발생한 전투손상에 대하여 ABDR(Aircraft Battle Damage Repair) 기술을 적용하여 손상평가 및 수리설계를 수행하고, 그 내용과 절차를 양식에 정리하였다. 또한, 정적강도 및 피로수명 계산과 같이 수리설계 구조의 구조건전성을 평가하여 비행안전 여부를 입증하고 영구수리 시점을 판단하였다.