• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2014년도 추계학술대회 논문집
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• pp.569-569
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• 2014

The interior vehicle noise due to the exterior aerodynamic field is an important topic in the acoustic design of a car. The air flow detached from the A-pillar and impacting the side windows are of particular interest as they are located close to the driver / passenger and provides a lower insulation index than the trimmed car body parts. This paper presents a numerical analysis method for a simplified vehicle model. The internal air cavity including trim component are included in the simulation. The car body includes the windshield and two side windows. The body is made of aluminum and trimmed with porous layers. The methodology proposed in this paper relies on two steps: the first step involves the computation of the exterior flow and turbulence induced non-linear acoustic field using CFD Code. The second step consists in the computation of the vibro-acoustic transmission through the window using the finite element vibro-acoustic solver Actran.

• 디자인학연구
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• 제12권4호
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• pp.99-108
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• 1999

승용차의 실내공간은 다수의 부품들로 구성되어 있으며, 그들 중 인스트루먼트 패널은 그 디자인에 따라 실내공간의 활용과 이 , 그리고 운전자의 조작성과 실내공간의 안전도까지도 좌우하는 중요한 부품이다. 초기 자동차에서의 인스트루먼트 패널은 엔진실과 실내공간을 구분 짓는 벽체에 운전에 필요한 엔진의 상태를 알리기 위한 계기를 부탁하는 개념에 출발하였다. 그러므로 운전석의 좌우 위치에 관게없이 패널 중앙부에 계기류를 장착하는 개념이 주류를 이루었다. 차량의 기능 향상과 장착품의 증가로 운전석 중심의 독립된 계기판과 충격 흡수제를 부탁한 구조가 등장하였으며, 이것은 오늘날의 다양한 형태의 계기판의 출발점이 되었다. 최근의 승용차의 계기판은 차량 안전 법구의 강화와 신공법의 개발, 그리고 운전 편의성 향상 등을 위하여 중앙부에 클러스터를 장착한 유형이 몇몇 차종에서 다시 등장하고 있다. 이러한 승용차 인스트루먼트 패널의 디자인 특징과 기능성 특성들을 분석하면 다음과 같은 결과를 얻을수 있다. -전방 시인성의 향상을 위한 I/P 전체의 부피 감소 -강화된 충돌 규제를 위한 보조 장치와 완충 구조의 설정 -운전 편의성과 초점 거리 차이 감소를 통한 안전성 향상을 위한 중앙부 클러스터 장착 유형의 재등장유형의 재등장

• 소음진동
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• 제10권3호
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• pp.480-485
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• 2000

This paper presents the application of the substrctural analysis based on the frequency responses for the prediction of the interior noise in a car. The complex trimmed body with the high modal density is presented by the experimental data. Finite element model presents the powertrain and its subframes with the lower modal density. The substructural analysis based on the frequency responses combines the frequency response functions from the numerical analysis and the experiments. It describes the interior noise successwfully. Using this method we can pick up the most dominant paths for the booming noise and predict the effects of the design changes easily.

• 디자인학연구
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• 제13권2호
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• pp.25-32
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• 2000

승용차의 차체 비례는 시간의 경과와 시장에서의 승용차 특성 변화에 따라 변화되어 왔다. 일반적으로 세단형 승용차에서 캐빈의 비례는 승객을 위한 공간이라는 의미에서 더욱 중요성을 가진다. 그러나 이러한 캐빈의 비례도 각각의 모델의 컨셉트에 따라 변화되어 왔다. 국내 승용차의 캐빈 비례는 초기모델에서 통일된 전략이나 방향성을 보이지 않으나, 후기 모델에 가서는 특정한 비례로의 통일성을 보이고 있다. 이들 비례는 3박스 구조로 나뉘어 있는 차체의 소형과 준중형의 세단형 승용차에서는 축간 거리와 그린하우스의 비례가 각각 58%와 57%이며, 중형 승용차에서는 두 비례 모두 56% 정도로 계산되는데, 이것은 실내 공간 비례가 중형승용차보다 소형과 준중형이 더 높은 것을 알 수 있다. 소형 승용차와 세단형 승용차의 실내공간 비례는 향후에도 증가하여 60%의 비율에 근접할 것으로 예측되며, 이 경향은 중형 세단형 승용차에서도 나타날 것으로 보인다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 춘계학술대회 논문집
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• pp.200-207
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• 1999

The purpose of this research is to setup the design procedure of low noise rolling stocks. Noise sources are identified at a field test, and the contribution of noise sources to each part of car interior is ensured by sound intensity measurement technique. Added material to each section of the carbody makes it possible to identify absorption or reflection performance of each part to the anterior random noise. Such experimental tests to the exterior noise intruding through the floor represent that the best countermeasure on the floor is to implement reflecting material which can properly interfere noise. Design procedure of low noise rolling stocks is set through several experiments.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.680-685
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• 2006

The latest trend in the automotive industry demands the development of high stiffness car bodies and the securement of inter-system performance for low vibration and noise vehicles. This demand, however, conflicts with need for light weight design and greater fuel efficiency, thus raising the importance of optimization design to satisfy both developmental goals. We chose two European medium sedans, which has gasoline engine and diesel one, to elucidate the noise characteristics of diesel passenger cars, whose sales have been increasing in both Korea and Europe. In the present study a systematic experiment was conducted to analyze the noise characteristics in diesel cars. we made it possible for differentiating car management according to customer demand while allowing for improved commercial feasibility. it was possible to improve interior noise by 2 dB(A) on average sound pressure level. As a result, by 4% higher on articulation index(AI).

• 한국자동차공학회논문집
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• 제10권3호
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• pp.237-244
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• 2002

Analyzing acoustic-structural systems such as automobiles and aircraft, the FRF-based substructuring (FBS) method is one of the most powerful tools. In this paper, a general procedure for the parametric sensitivity analysis of vibro-acoustic problems has been presented using the multi-domain FRF-based substructuring formulation. For an acoustic-structural system sub-structured by multiple domains, the substructuring formulation gives the reaction farces on the interface boundaries. The design sensitivity formula is obtained from the direct differentiation of the reaction force expression with respect to the design vector. As a practical application, the proposed design sensitivity formula is applied to an engine mount system of passenger car. An objective of the problem is to identify the most effective engine mounts and bushes in minimizing the interior noise over the concerned rpm range. The comparison of the sensitivity results with those of the finite difference method shows excellent agreement. In addition, stiffness modifications of the mounts and bushes identified through the design sensitivity analysis lead to a successful decrease of the interior noise. This results show usefulness of the present method very well.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2007년도 추계학술발표대회 논문집
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• pp.193-194
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• 2007

The Japanese 'H' motor company is the one of a few engine makers for F1 racing machine in the world. And it has a tradition and ability to make a humanoid walking robot 'Asimo'. But 'H' motor company is known as a motorcycle maker not a car in Korea. It wanted to reinforce the brand image and identity to Korean consumer. And it needed a powerful marketing tool for the brand image distinguished from other global motor companies. It demanded a stand design to show their powerful and unique identity for surpass other rivals in 2007 Seoul Motor Show. This stand for 'H' motor company in 2007 SMS has an area of 1,250m2 and located between huge domestic motor companies, K and SR. The design was planed to show its unique identity and image, overcoming its relatively small size. I designed a round-shape ceiling structures covered whole booth space for enclosure and vortical space sense. That made a strong brand image by light and sharp structures completely distinguished from other stands. And it has a main logo sign for recognizing the stand from a distance.

• 한국철도학회:학술대회논문집
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• 한국철도학회 1999년도 추계학술대회 논문집
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• pp.139-145
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• 1999

The design of driver's cab includes the structure of cab frame, the layout of driver's cab equipment and facilities, i.e. driver's desk, seat, windows, floor, interior equipment, cab partition etc. The concept applied to the detail design has to be based on the ergonomics to guarantee the safety, comfort, and easy operation for the driver. In the aspect of manufacture, one more factor 'modulization' has to be considered into the design of sub blocks for cost-down. The design has to be implemented in the space allocated for driver's cab, which space is directly determined by the cab frame, optimized for the layout of driver's cab. The design process and results of the driver's cab for KHST will be described in this paper.

• 한국실내디자인학회논문집
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• 제23권1호
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• pp.14-22
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• 2014

The purpose of this study is to provide the connectivity between the preference of architectural buildings and automobile companies as the most widely used background images for automobile advertisements. Based on the familiarity of the brand, the complexity of the message, and the novelty of the advertisement, this research is discovered with preferred images of automobile companies as well as the connectivity by analyzing architectural buildings emerging with various background images of automobile advertisements. After analyzing all three elements for the advertising communication, the conclusions through case investigations of nine automobile companies are the below. Firstly, the familiarity of the brand from nine automobile companies was high ranked satisfaction scores after questionnaire surveys. Secondly, all the aspects for the space, formative, material, height, and utilization related to the complexity of the message are not only matched the preferred images which automobile companies persue but the same preferred design elements after reviewing the most preferred and next most preferred images from the companies. Lastly, the methods for emphasizing the automobile itself which is related to the novelty of the advertisement simplify background images along with preferred artificial structures.