• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 B
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• pp.593-596
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• 1992

An evaluation method for the effective length of electromagnet - which bas U-shape in frontview and trapezoidal in side view - is presented. Using 2D FEM, 2 analysing models are introduced for calculating effective length of the magnet ; the front model is using the normalized equi-pole face area of the magnet and the side model using the normalized equi-magnetic circuit. The ratio of the effective length to the length of bottom plate (core) comes out 1.25 - 1.30. In addition, 3D FEM analysis has been done and a proto-type test model is manufactured to verify the analysing method. The ratio by the experiment appears 1.2, which is reasonably in good agreement with the suggested numerical results.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2006년도 춘계 학술발표회 논문집
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• pp.20-27
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• 2006

중국 Three Gorges Project의 대수로사면 안정성은 설계와 시공측면에 있어 주요 관심사가 되었다. 사면 굴착으로 인한 제하과정에서 암반은 역학적으로 불안정한 상태에 놓인다. 본 논문은 FEM(2D-3D)를 이용하여 단층 암반 굴착으로 인한 암반사면의 안정성을 평가하였다. 해석결과 굴착 후 수로사면의 양측 수직벽과 분리울타리의 중간 상부에서 인장응력과 전단손상영역이 주로 발생하였다. 해석결과를 토대로 대규모 사면활동에 대한 안정성을 확인하였으나 시공단계에서 국부적 사면활동을 방지하기 위한 록볼트와 록앵커 등의 보강이 필요한 것으로 검토되었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2010년도 하계학술대회 논문집
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• pp.210-210
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• 2010

에너지 하베스트 기술은 자연의 빛에너지, 휴대용 기기 탑재/부착장치의 미세 진동에너지, 걷거나 뛰는 인간의 신체활동으로 인한 소산에너지 등을 흡수하여 전기에너지로 변환, 전자기기의 전력으로 사용하는 재생형 에너지원이다. 본 논문에서는 그 중 주변 환경에서 에너지를 끌어 쓸 수 있는 기술 중 압전 효과 방식을 이용한 진동 형태의 에너지 하베스트 기술을 활용하여 설계하고 FEM simulation을 통해 분석해보았다. 압전 물질로는 PZT를 사용하고 메탈기반의 캔틸레버로는 구리를 사용하여 크기를 길이, 넓이, 폭 각각 $6{\times}4{\times}0.025mm^3$으로 모델링하여 444Hz의 공진주파수에서 응력이 $2.68e^{+5}Pa$ 발생하는 결과를 얻었다. 그 결과 $d_{33}$ 모드의 전극형태에서 전압을 2.56V 얻을 수 있음을 추론할 수 있었다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제50권11호
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• pp.556-562
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• 2001

Spacer is used between main tank and auxiliary tank for on load tap changer in gas insulated power transformer. This paper deals with electrical design of spacer and discusses different analysis method of between 2D FEM(finite element method) and 3D FEM. To design spacer, we modeled structure of two kind of coaxial cylinders of spacer conductors and analysised electric field of spacer at impulse and induced test voltage condition. Spacer has 13 conductors and electric field was changed according to arrangement of conductors. We could find out arrangement of conductors at which electric stress is minimum. And this arrangement was satisfied with actual test conditions.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제55권3호
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• pp.159-167
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• 2006

According to industrial development, all fields using chemical instrument and material are generated an electrostatics. Electrostatic problems were very important part to all these components, moving system, printer, clothe machines etc. This paper was represented an analysis of electrostatic electrification by FEM (finite element method) of industrial type Inkjet plotter. Here electrostatics distribution analysis is accomplished by Maxwell-2D. We are showed an electrostatics generation source by rubbing and meager profits of electric charge. It know electronic values with each system position by experiment. These are decreased through earth and electricity shielding. Therefore this paper is proved by the simulation and experiment result.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1998년도 하계 학술대회 논문집
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• pp.129-135
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• 1998

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 춘계학술대회 논문집
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• pp.1167-1172
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• 2006

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.220-223
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• 2000

In this study for the development of a 3D pattern mill, we designed its layout which has high stiffness and low-weight structure. We calculated the load of each axis component when 3D pattern mill is under the worst cutting conditions. On base of the calculations, we determined the size of its structure and selected main components of the machine. Also, using FEM we analyzed the layout design of 3D pattern mill to reduce the wcight of structure and increase stiffness of it. According to the load position and direction, shapes and values of the deformation and the stress distributions are calculated, also we calculated the natural frequencies and mode shapes in order ta modify and redesign the weak parts

• 한국산업융합학회 논문집
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• 제27권3호
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• pp.527-534
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• 2024

In this study, focuses on noise reduction between floors in the civil and architectural fields. Specifically, it investigates the application of newly developed 3D Textile to slabs to reduce interfloor noise. The effect of 3D Textile, through performance analysis via experiments and noise analysis using finite element method, provides a new understanding of noise reduction technology, and is expected to contribute to the improvement of living quality in residential spaces.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1996년도 하계학술대회 논문집 C
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• pp.1753-1755
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• 1996

This paper presents an analysis of the 3D microwave oven considering its forming. The results were compared with experimental data. Finite Element Method(FEM) using edge clement is employed for the analysis. For solving the large sparse system matrix equation was solved using the parallelized QMR method. Analysis of the 3d cavity has troublesome difficulties such as spurious solutions, too many memory and long computation time. We overcome this difficulties by using edge clement for spurious solutions and the parallelized QMR method by the aid of Paralle Virtual Machine(PVM) for the memory and computation time.