• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.153-158
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• 2007

Sound insulation performance of the flush door in the apartment unit was recently decreased due to the door for the purpose of barrier free. To evaluate sound insulation, the test for 13 kinds of flush doors was performed as aperture conditions under the flush door. and the measured value was compared with the predicted values of theoretical sound transmission. The results were summarized follow; First, in case of doors with aperture by barrier free, the single number quantities ($D_{pw}$) were evaluated $21{\sim}23dB$. Whereas, in case of existing door with frame, $D_{pw}$ was evaluated $28{\sim}31dB$. And in case of sealed doors, $D_{pw}$ was evaluated $31{\sim}34dB$. Second, the measured $D_{pw}$ was good agreement with the predicted $D_{pw}$ in condition of small aperture.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 춘계학술대회논문집
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• pp.918-923
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• 2007

Currently, automotive industries improve the vehicle performance and reduce the development period of vehicle using each module part for the high quality and performance of vehicles. However each component part doesn't generate the noise and vibration problems, sometime these problems are generated on the assembly status between vehicle chassis frame and each module part. On this study, in order to analysis the dynamic characteristics of a shield door module that is a typical module part of vehicles, the acquisition and evaluation process about the vibration and noise of shield door module is developed. Also the possibility to apply to shield door module of the developed process is verified by the comparison with the dynamic characteristics between plastic and steel module plate.

• 대한기계학회논문집A
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• 제38권1호
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• pp.71-78
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• 2014

대형냉장고의 도어 힌지는 냉장고 도어의 개폐 동작을 원활하게 하고, 도어의 하중과 도어개폐로 인한 충격을 견디는 구조 안전성이 요구된다. 하지만, 도어 힌지는 복잡한 힌지 메커니즘과 민감한 구조 안전성으로 인해 설계 시 어려움이 많다. 본 논문에서는 스프링 응답 특성, 공간제약, 구조강도 성능을 만족하는 메커니즘을 설계하고, 메커니즘을 둘러싼 외부 프레임의 부피를 최소화하여 힌지의 생산 단가를 절감하고자 한다. 이를 위해 PIDO(progress integration and design optimization) 기술을 이용하여 모든 설계절차를 자동화함으로써 설계의 효율성을 높이는 성과를 거두었으며, 최적화 결과 목표로 하는 힌지 메커니즘 성능과 구조안정성을 개선하면서 힌지 프레임 질량의 24%를 절감하였다.

• 한국생산제조학회지
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• 제21권1호
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• pp.21-25
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• 2012

In this study, the safest model can be selected by the simulation result of structural safety analysis according to the shape of impact bar affected at side door of automobile. The open sectional model of semicircle type has the lowest deformation and stress among 4 kinds of models. As the weight of this model has 30% in comparison with other models, it becomes most economical and stable. As the open sectional model of cap type the highest deformation and stress among 4 kinds of models, it becomes weakest. The closed models with circular and rectangular types has the stress far lower than cap type. The maximum deformation is shown at the center part of impact bar but the maximum stress occurs at the joint part between impact bar and frame.

• 대한안전경영과학회지
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• 제15권3호
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• pp.29-35
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• 2013

The research is to verify by experiments whether the steel truss structure is able to withstand the load of cement bricks of upper part of a door for the safe use of lightweight steel truss structure instead of concrete lintel which is to be installed at upper part of door frame in building cement bricks for apartment construction. The steel truss is designed in order not to disturb bricks-building and the shape of structure was verified by bending test. According to experiments result, camber was applied to steel structure that enabled construction work to be improved and was proved effective for the prevention of accidents by cement bricks-building load test.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2008년도 춘계학술대회 논문집
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• pp.999-1000
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• 2008

• Journal of the Korean Wood Science and Technology
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• 제40권5호
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• pp.319-326
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• 2012

Han-green building is one of the modernized Korean traditional buildings developed by Korea Forest Research Institute. This building was developed to increase the competitiveness of Korean traditional building using state-of-art technologies; hence Han-green building has the inherent characteristics of traditional building such as exposed wood frame in wall. Because of discontinuity in wall by the exposed wood frame, there is a concern on heat-air leaking in terms of energy performance. In this study, air-tightness of Han-green building was evaluated to investigate the influence of gaps between frames and in-fill walls. Blower door test was carried out to evaluate the air-tightness, and air-change rate (ACH50) was evaluated by averaging four set of pressurization and depressurization test. The air-change rate of Han-green house was 5.91 $h^{-1}$. To improve energy performance of Han-green house, thermal infrared images of Han-green house were taken in winter with heating to find out where the heat loss occurred. It was found that the building lost more heat through gaps between frames and in-fill walls rather than through other parts of this building. After covering all the gaps by taping, the blower door test was performed again, and the air-change rate was improved to 5.25 $h^{-1}$. From this analysis, it was concluded that the heated air can leak through the gaps between frames and walls. Therefore, when one designs the post and beam building with exposed frame, the detail design between frame and wall needs to be carefully dealt. However, Han-green building showed relatively high air-tightness comparing with other country research results.

• 한국소음진동공학회논문집
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• 제17권9호
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• pp.853-861
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• 2007

Currently, automotive industries improve the vehicle performance and reduce the development period of vehicle using each module part for the high quality and performance of vehicles. However each component part doesn't generate the noise and vibration problems, sometime these problems are generated on the assembly status between vehicle chassis frame and each module part. On this study, in order to analysis the dynamic characteristics of a shield door module that is a typical module part of vehicles, the acquisition and evaluation process about the vibration and noise of shield door module is developed. Also the possibility to apply to shield door module of the developed process is verified by the comparison with the dynamic characteristics between plastic and steel module plate.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2004년도 추계학술대회논문집
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• pp.132-137
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• 2004

In order to reduce automobile parts weight, TWB(Tailored welded blank) forming is widely used in the forming of car panel, such as door inner, side outer panels. In this study, one of the current problems of TWB forming was analyzed, especially for the try-out process of TWB door inner panel without frame. A comparison was made between actual panel measurements and results of forming analysis for formability and springback.

• 방사성폐기물학회지
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• 제4권1호
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• pp.77-85
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• 2006

한국원자력연구소에서는 현재 사용후핵연료의 효율적인 관리를 위한 차세대관리 종합공정의 실증용 핫셀을 건설중에 있다. 이 핫셀에서 모든 물품의 반출입은 후면 차폐문을 통해 이루어지므로 차폐문의 사용빈도가 매우 크며, 따라서 후면 차폐문의 구조적 안전성 유지가 필수적이다. 본 논문에서는 핫셀의 후면 차폐문에 대한 구조적 안전성을 유한요소 해석을 통해 평가하였다. 후면 차폐문을 닫을 때 벽면의 차폐문틀과 충돌하면서 발생하는 구조적 변형 에 대한 안전성 평가를 위해 이 상황을 충돌-접촉 문제로 가정하고 동적 해석을 수행하였다. 또한 충돌시 반력에의한 후면 차폐문의 전도 가능성 및 이동중 갑작스럽게 정지할 경우 관성에 의한 전도 가능성에 대해서도 해석을 수행하였다. 해석 결과를 통해 차폐문과 차폐문틀 모두 충돌에 의한 구조적 변형에 대해 충분히 안전함을 확인할 수 있었으며, 여러 사고 조건에 대해서도 후면 차폐문의 전도가 일어나지 않고 안정성을 유지함을 보였다.