• 대한기계학회논문집
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• 제16권1호
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• pp.13-21
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• 1992

본 연구에서는 구조-음향모드 연성계수를 이용하여 심각한 소음문제가 발생하 는 경우의 효과적인 소음저감 방안을 제시하고, 제작된 차실모델에 대한 소음저감 시 뮬레이션을 수행한 후 그 결과를 실험치와 비교함으로써 수립된 소음저감 방안의 신뢰 도와 유용성을 확인하였다.

• 산업경영시스템학회지
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• 제23권60호
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• pp.1-9
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• 2000

This paper deals with the difference between human sensibility collected from real product and that through graphic image(photographs and graphic images on CRT monitor) on the same automotive interior. The objective of this study is to verify the possibility that, If there are some restrictions in collecting human sensibility through real product directly, they can be overcome by using graphic image instead, making it easy to collect and analyze human sensibility so as to reflect consumers sensibility in the design of automotive interior, and also comparing the result between real product and graphic image on CRT monitor in order to confirm the potentiality of developing a remote human sensibility survey system through Internet. Therefore two experiments were conducted and the object for experiments was limited to automotive interior. The analysis results showed that there were significant differences between graphic image and real product in case of total interior and IPC(Instrument Panel Center) and no significant difference in case of display panel. Also, there were no significant difference when the subject group was female(housewife). To conclude, we can infer, in case of display panel, that it is possible to replace real product with graphic image to extract similar results on human sensibility and to collect human sensibility through Internet.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2006년도 추계학술대회논문집
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• pp.694-698
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• 2006

This paper presents an optimal design process using beads on a body panel to improve interior noise of a passenger vehicle. Except modification of structural members, it is difficult to find effective countermeasures that can work for the intermediate frequency range from 100 Hz to 300 Hz which lies between the booming and low medium frequency. In this study, it is a major goal to find additional counter-measures for this intermediate frequency range by performing optimal design of beads on body panels. The proposed method for design optimization consists of 4 sub-steps, that is, a) problem definition, b) cause analysis, c) countermeasure development and d) validation. The objective function is minimization of interior noise level. The major design variables are the geometrical shape of a bead and combination of beads on the critical panels. Sensitivity analysis and optimization are performed according to the predefined process for an optimal design. It is verified that the proposed design decreases the level of noise transfer function above 5 dB.

• International Journal of Automotive Technology
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• 제8권1호
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• pp.67-73
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• 2007

This study analyzes the interior noise that is generated during acceleration of a passenger car in terms of car body structure and panel contribution. According to the transfer method, interior noise is classified into structure-borne noise and air-borne noise. Structure-borne noise is generated when the engine's vibration energy, an excitation source, is transferred to the car body through the engine mount and the driving system and the panel of the car body vibrates. When structure-borne noise resonates in the acoustic cavity of the car interior, acute booming noise is generated. This study describes plans for improving the car body structure and the panel form through a cause analysis of frequency ranges where the sound pressure level of the rear seat relative to the front seat is high. To this end, an analysis of the correlation between body attachment stiffness and acoustic sensitivity as well as a panel sensitive component analysis were conducted through a structural sound field coupled analysis. Through this study, via research on improving the car body structure in terms of reducing rear seat noise, stable performance improvement and light weight design before the proto-car stage can be realized. Reduction of the development period and test car stage is also anticipated.

• 대한토목학회논문집
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• 제37권2호
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• pp.451-457
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• 2017

본 연구에서는 폭발하중을 받는 슬래브-기둥 접합부의 거동을 해석적으로 분석하였다. 슬래브-기둥의 거동을 분석하기 위해 유한요소해석프로그램 LS-DYNA를 사용하여 폭발해석을 수행하였다. 대상 접합부의 형태는 일반적인 내부기둥형태의 슬래브-기둥 접합부와 기둥주위에 드롭패널(drop panel)을 보강한 접합부로 설정하였다. 또한, 슬래브에 의한 기둥의 구속도에 따라 내부기둥, 외부기둥 그리고 모서리기둥 시험체를 모델링하여 비교분석이 수행되었다. 해석결과는 접합부의 파괴형상, 단위부재의 거동 등을 포함하고 있다. 해석결과 드롭패널을 보강한 경우 슬래브-기둥 접합부의 거동이 향상되는 것을 확인하였으며 슬래브에 의한 기둥의 구속도가 감소할수록 거동이 저하되는 것을 확인하였다.

• 한국철도학회논문집
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• 제10권5호
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• pp.596-599
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• 2007

전동차 내장패널에 대한 비교전과정평가를 실시하였다. ISO14044 표준과 에코인디케이터 99 방법론, SimaPro 7.0 software, Ecoinvent DB를 이용하여 전과정목록 DB를 구축하고 LCA를 수행하였다. 전동차 내장패널의 환경성 측면에 대한 일반적인 예상에 대하여 LCA를 통한 검증을 수행하였다. 전동차 내장패널의 중량이 환경성과 상관이 있음에도 불구하고 상대적 중요도는 높지 않았으며, Al 내장패널의 경우 사용단계의 환경영향이 가장 큼에도 불구하고 타 재질 내장패널에 비해 제작단계의 환경영향이 주요환경이슈로 도출되었다. Al 내장패널의 경우, 재활용으로 인한 환경편익이 크나, 장기적으로는 제작단계의 환경영향을 저감하여야 타 재질 대비 환경성 측면의 경쟁력을 강화할 수 있다.

• 대한인간공학회지
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• 제29권1호
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• pp.25-31
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• 2010

It is known from consumer surveys that the interior design of cars greatly influences on consumers' affection. Most notably, the instrument panel which occupies the driver's attention while driving would be one of the main components that affect consumer's affection, but the designer does not often put due importance to this design component. The purpose of this study is to define consumers' affection on the instrument cluster panel in terms of its design factors: color of panel lighting and layout of meters as independent factors. Semantic differentials or affective adjectives that are related to the instrument panel were first derived from surveys, existing studies and the available literature. Then, representative affective factors were drawn using factor analysis and multi-dimensional scaling (MDS). Evaluation of the instrument panel was performed and analyzed by Taguchi's robust design to provide more robust results under various noise factors which are color and material of car interior. Experiment revealed that consumers had five affective factors on the instrument panel and luxurious, charming, and visible affections are grouped into a factor and unique and dynamic affections in another factor. Evaluation of the instrument panel by Taguchi's robust design found that the white color of panel lighting and the panel with four meters was the most preferred design in terms of both the affection of luxury and uniqueness.

• 디자인융복합연구
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• 제15권5호
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• pp.71-83
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• 2016

인테리어 패널은 실내 벽체의 마감 디자인에 많이 활용되고 있으며 패널들의 배치로 형성되는 다양한 패턴은 장식적 효과뿐만 아니라 정보전달의 역할도 한다. 설계자가 원하는 디자인에 따라 패널을 배치하는 것은 반복되는 작업을 요구하는데 본 연구는 패널배치 과정의 체계화를 통해 자동화를 지원하는 것을 목적으로 한다. 이에 본 연구에서는 인테리어 패널의 활용 특징을 고려하여 패턴표현에 관한 이론적 고찰을 진행하고 이를 바탕으로 비트맵 이미지 픽셀과 인테리어 패널의 형태 변화를 이용한 세 가지 패널배치 패턴 표현 방법을 제안하였다. 또한 제안한 방법의 실제 적용 가능성 검증을 위해 제안한 세 가지 방법 중 비트맵 이미지 픽셀과 인테리어 패널의 유형속성을 이용한 패턴표현 방법을 적용하여 BIM기반 설계를 지원하는 인테리어 패널 자동배치 도구를 구현 하였다. 이는 물량정보나 패널 배치순서와 같은 시공단계에 활용 가능한 정보의 자동생성도 지원하여 설계자 및 시공자의 작업효율 향상에 도움이 된다. 또한 본 연구에서 제안한 인테리어 패널 자동배치 패턴표현 방법은 바닥 타일과 같은 기본단위의 반복을 요구로 하는 다양한 장식객체의 배치에도 활용 가능할 것으로 기대 된다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.584-588
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• 2007

A comparative Life Cycle Assessment(LCA) among three types of Electric Motor Unit(EMU) Interior Panel(IP) was conducted. A functional unit for comparative LCA is a weight of IP for 1 EMU. It assumed that Manufacturing stage and its upstream processes, Use stage and End of Life(EoL) stage are included in the boundary of product system. For Use stage, the weight of IP causes electricity consumption. It is assumed that aluminum IP is recycled and the other IPs are incinerated at the EoL stage. As comparison results, aluminum IP has much larger environmental impact(5.162pt) than others(FRP IP; 4.069pt, Phenol IP; 4.053pt) even though recycling consideration is included. The manufacturing stage of aluminum has relative big envrionmental impact(1.824pt) and this point make the most important difference from other IPs(FRP IP; 0.1617pt, Phenol IP; 0.4534pt)). Despite of large weight difference between FRP IP(888.56Kg) and phenol IP(315Kg), the final environmental impact result has only little difference(0.016pt, 0.39%). With this result, the EMU designer can choose IP with a consideration of the environmental performance of IP.

• Steel and Composite Structures
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• 제28권5호
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• pp.641-653
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• 2018

This paper presents experiment and bearing capacity analyses of steel dual-lintel column (SDC) joints in Chinese traditional style buildings. Two SDC interior joints and two SDC exterior joints, which consisted of dual box-section lintels, circular column and square column, were designed and tested under low cyclic loading. The force transferring mechanisms at the panel zone of SDC joints were proposed. And also, the load-strain curves at the panel zone, failure modes, hysteretic loops and skeleton curves of the joints were analyzed. It is shown that the typical failure modes of the joints are shear buckling at bottom panel zone, bending failure at middle panel zone, welds fracturing at the panel zone, and tension failure of base metal in the heat-affected zone of the joints. The ultimate bearing capacity of SDC joints appears to decrease with the increment of axial compression ratio. However, the bearing capacities of exterior joints are lower than those of interior joints at the same axial compression ratio. In order to predict the formulas of the bending capacity at the middle panel zone and the shear capacity at the bottom panel zone, the calculation model and the stress state of the element at the panel zone of SDC joints were studied. As the calculated values showed good agreements with the test results, the proposed formulas can be reliably applied to the analysis and design of SDC joints in Chinese traditional style buildings.