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흡음형 소재를 이용한 자동차 방음재 Package의 최적화
이원구(Wonku Lee),박봉현(Bonghyun Park),윤형준(Hyungjoon Yoon),김진수(Jinsoo Kim),맹주영(Jooyoung Maeng) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper shows the process of optimization of vehicle interior acoustic package. Instead of the traditional barrier insulation concept, the package using the porous fiber material with high absorption makes it possible to achieve the significant weight reduction of interior parts without the deterioration of sound in-vehicle. Finally, the test results for the production vehicle based on design of experiment confirmed that the proper package specification in view of the weight and performance can be selected among the several combinations of interior parts.
루프가 형성된 부직포를 이용한 차량용 고흡음성 헤드라이닝
이수남(Sunam Lee),이원구(Wonku Lee),조병철(Byungcheol Cho),조윤진(Younjin Cho) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
The function of headlining is to raise merchantable quality and comport to by making interior view of automotive more graceful. Preventing damage to the passenger"s head in the event of car crash could be another function of it. Materials of which targets are light weight, high performance, luxury and eco-friendliness have been developed recently. In this study, needle-punched nonwovens which consist of polypropylene fibers and glass fibers were produced by needle-punching process, and then a composite nonwoven of 3D structure was prepared by two looped nonwoven which were made of needle-punched nonwovens by loop-punching process. The absorption coefficient test result showed that the acoustic performance of a developed product having bulky structure was better than those of the conventional product and the durability test result showed that the deformation of a developed product did not occur after environment test.
차량 도어의 이음(Buzz. Squeak & Rattle Noise)에 대한 시험적 고찰
김지훈(Jihoon Kim),이원구(Wonku Lee),김병훈(Byunghoon Kim),장익근(Ikguen Jang),지성호(Sungho Ji) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, it has been widely used the single vehicle-component exciter by which the acoustic engineer can simulate and evaluate the quality level of the BSR(Buzz, Squeak and Rattle) noise generated by the interior hard trim parts of vehicle on the driving conditions, in particular, on the rough road. In this study, using the single vehicle-component exciter with sine sweep signal, the BSR noise of vehicle modular door system was investigated and the improvement of BSR noise level was confirmed through the structural treatment based on the structural analysis results from the modal test of modular door system.
모듈 단위 열화조건을 고려한 자동차용 칵핏 모듈 이음(BSR Noise)에 대한 시험적 고찰
이철현(Chulhyun Yi),양정민(Jeongmin Yang),조진호(Jinho Cho),이원구(Wonku Lee),우창수(Changsu Woo) 한국소음진동공학회 2014 한국소음진동공학회 학술대회논문집 Vol.2014 No.10
In this paper, in order to impart the aging condition of the parts, by configuring the cycle of temperature from low temperature was performed by applying the aging conditions for vehicle cockpit module. The reason for the selected modules of the cockpit vehicle parts, because the joint occurrence typical components of the room component is a first module and ceiling cockpit module. After setting the excitation profile using the BSR exciter only that this is for the module degradation after the initial and grasp the change in the dynamic characteristics of the modules based on the before and after deterioration may be made in the module, grasp the noise generating position I measured the noise and proximity. Was also visualized on the position of the joint is generated using a sound camera to objective results occurring where the joint is selected through subjective evaluation.
자동차 칵핏 모듈용 시편단위의 소재별 Squeak Noise 특성에 관한 시험적 고찰
양정민(Jeongmin Yang),김성배(Sungbae Kim),이철현(Chulhyun Yi),조진호(Jinho Cho),이원구(Wonku Lee) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
It is treated more seriously than ever as the customer requirements are becoming a high-quality and diversification. Among the various elements to affect customers evaluation of automobile quality, BSR(buzz, squeak, rattle noise) are considered to be a mostly contributing factor. Squeak noises in cockpit modules are one of the major concerns mentioned above. Recently, measurements of the BSR noise between the parts that make up the products from the perspective that the structural causes. For structures that make up material has not been any consideration of the BSR noise characteristics. The aim of this study is to clarify the characteristics of noise occurrence in vehicle cockpit module that consist of plastic material after measuring noise by squeak special testing instrument.
한진우(Jinwoo Han),유종남(Jongnam You),조진호(Jinho Cho),이원구(Wonku Lee),송상래(Sangrae Song) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
In this study, the improvement vehicle exterior idle noise without changing source(engine) but developing vehicle body part were investigated. Contribution of each component identification, quantification techniques for each component, achievement of basic technology was conducted. The main problem areas were identified through a sound camera. The contribution of each component of the noise reduction was quantified through PBNR (Power Based Noise Reduction) technique. When we improve this PBNR value, we achieved competitive vehicle exterior idle noise.