• Title/Summary/Keyword: 유한요소해석 소프트웨어

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Study on Structural Design and Analysis of Fuel System for Aircraft Auxiliary Fuel Tank (항공기 보조연료탱크 연료시스템 구조 설계 및 해석)

  • Choi, Won;Park, Hyunbum
    • Journal of Aerospace System Engineering
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    • v.13 no.4
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    • pp.60-65
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    • 2019
  • This study did a structural design of a fuel system of auxiliary fuel tank applied to aircraft then analyzed it. The safety of the structural design result was investigated. Aluminum alloy metal structure was applied to the fuel system structure. The structural analysis was conducted using commercial finite element software. The design requirement was maximum accelerate condition of the structure. Therefore, structural design was done considering the maximum accelerate condition.

Transducer design for ultrasonic metal welder (초음파 금속 용접기용 트랜스듀서 설계)

  • Lee, Dong-Heon;Park, Sung-Jun;Tao, Yu;Kim, Dong-Ok;Yun, Cheol-Ho
    • Proceedings of the KIPE Conference
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    • pp.337-339
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    • 2007
  • 본 논문에서는 유한요소 해석 소프트웨어를 이용하여 연질금속을 접합할 수 있는 초음파 금속용접기용 트랜스듀서를 개발하였다. 개발된 트랜스듀서는 35kHz의 공진 주파수의 특성을 갖게 설계하였으며 트랜스듀서 플랜지의 종축변위가 최소가 되도록 설계하였다. 볼트체결형 트랜스듀서는 결속력에 따라 기계적 Q값이 변동되어 출력에 많은 영향을 준다. 따라서 특성 실험을 통하여 트랜스듀서에 대한 체결토크를 최적화하였다.

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Design and Analysis of V-type Liner Ultrasonic Motor by Using ANSYS (ANSYS를 이용한 V-형 선형 초음파 모터의 해석과 설계)

  • Seo, San-Dong;Park, Tae-Gone
    • Proceedings of the KIEE Conference
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    • pp.1986-1988
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    • 2005
  • V-형 선형 초음파 모터를 설계하고 유한 요소 해석 소프트웨어인 ANSYS9.0을 사용하여 모터를 해석하고 그 결과를 도출하였다. 이 모터의 기본적인 구조는 압전 세라믹을 V-형 모터 stator 에 부착한 형태이다. 모터의 동작을 위해서 90도 위상차가 있는 2개의 교류전원을 각각 세라믹에 인가하였다. 그러면 각 세라믹은 압전 역효과와 위상의 차이에 의해 모터 arm을 대칭-비대칭 운동을 하게 만든다. 그리고 이 운동이 타원 제적을 발생시킨다 즉 모터와 슬라이드의 접선에서 이 타원궤적 운동의 마찰력으로 모터가 동작하게 된다. 최적의 조건을 찾기 위해 ANSYS를 이용하여 모터의 구조에 여러 가지 변수-고정점, stator의 재질, arm-body에 부착한 세라믹의 위치, 위상차, arm의 결합각 차, arm-body와 세라믹의 크기 변화, arm의 크기 변화-를 주어 선형 초음파 모터 구조의 최적 조건을 찾아 설계를 하였다.

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Prediction of Structural Performance of an Automotive Ball Joint (자동차용 볼조인트의 구조적 성능 예측)

  • Kim, Seong-Uk;Jeong, Gyeong-Il;Lee, Kwon-Hee;Lee, Dong-Jin;Lee, Myeong-Gon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.1
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    • pp.705-713
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    • 2018
  • An automotive ball joint connects the suspension system to the steering system and helps to enable rotational and linear motion between the two elements for steering. This study examines a ball joint used in medium and large-sized pickup trucks. Ball joints consist of a stud, socket, bearing, and plug. The main structural performance metrics of ball joints are the pull-out strength and push-out strength. These structural parameters must meet certain criteria to avoid serious accidents. Test and simulation methods are used to investigate the design requirements, but tests are time-consuming and costly. In this study, we modeled ball joints in SolidWorks and performed a finite element analysis in Abaqus to predict structural performance. The analysis was used to obtain the structural performance required for the static analysis of a 2D axisymmetric model. The uncertainties in the manufacturing of the ball joint were assumed to be the manufacturing tolerances, and the dimensional design variables were identified through case studies. The manufacturing tolerances at each level were defined, and the results were compared with experimental results.

Performance Study of Diagonally Segmented Piezoelectric Vibration Energy Harvester (대각선 방향으로 분할된 압전 진동 에너지 수확 장치의 성능 연구)

  • Kim, Jae Eun
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.37 no.8
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    • pp.983-989
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    • 2013
  • This study proposes a piezoelectric vibration energy harvester composed of two diagonally segmented energy harvesting units. An auxiliary structural unit is attached to the tip of a host structural unit cantilevered to a vibrating base, where the two components have beam axes in opposite directions from each other and matched short-circuit resonant frequencies. Contrary to the usual observations in two resonant frequency-matched structures, the proposed structure shows little eigenfrequency separation and yields a mode sequence change between the first two modes. These lead to maximum power generation around a specific frequency. By using commercial finite element software, it is shown that the magnitude of the output power from the proposed vibration energy harvester can be substantially improved in comparison with those from conventional cantilevered energy harvesters with the same footprint area and magnitude of a tip mass.

Seismic Fragility Assessment of Liquid Storage Tanks by Finite Element Reliability Analysis (유한요소 신뢰성 해석을 통한 액체저장탱크의 지진 취약도 평가)

  • Lee, Sangmok;Lee, Young-Joo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.4
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    • pp.718-725
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    • 2017
  • A liquid storage tank is one of the most important structures in industrial complexes dealing with chemicals, and its structural damage due to an earthquake may cause a disastrous event such as the leakage of hazardous materials, fire, and explosion. It is thus essential to assess the seismic fragility of liquid storage tanks and prepare for seismic events in advance. When a liquid storage tank is oscillated by a seismic load, the hydrodynamic pressure caused by the liquid-structure interaction increases the stress and causes structural damage to the tank. Meanwhile, the seismic fragility of the structure can be estimated by considering the various sources of uncertainty and calculating the failure probabilities in a given limiting state. To accurately evaluate the seismic fragility of liquid storage tanks, a sophisticated finite element analysis is required during their reliability analysis. Therefore, in this study, FERUM-ABAQUS, a recently-developed computational platform integrated with commercial finite element and reliability analysis software packages, is introduced to perform the finite element reliability analysis and calculate the failure probability of a liquid storage tank subjected to a seismic load. FERUM-ABAUS allows for automatic data exchange between these two software packages and for the efficient seismic fragility assessment of a structure. Using this computational platform, the seismic fragility curve of a liquid storage tank is successfully obtained.