• Title/Summary/Keyword: Vibration durability

검색결과 285건 처리시간 0.028초

자동차 도어의 BSR 소음의 실험적 평가와 개선 (Experimental Evaluation of Buzz, Squeak and Rattle Noise of Vehicle Doors and Its Prevention)

  • 신수현;정철웅;정성수
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2007년도 추계학술대회논문집
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    • pp.617-621
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    • 2007
  • Recent advances in automotive noise control engineering have reduced major sound sources in the vehicle, customers perceive Buzz, Squeak and Rattle (BSR) as one of important indicators of vehicle quality and durability. As the long-term goal, we expect to establish the integrated design cycle for the reduction of BSR noise in the early stage of development, which consist of design, prediction, and evaluation procedures. This is possible only with great bulk of experimental data for BSR noise. In this paper, BSR noise is experimentally identified for vehicle doors, which have been traditionally considered as one of main sources of BSR noise. Based on this result, we proposed method for the prevention of BSR noise in the vehicle doors.

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Vehicle Dynamic Analysis Using Virtual Proving Ground Approach

  • Min, Han-Ki;Park, Gi-Seob;Jung, Jong-An;Yang, In-Young
    • Journal of Mechanical Science and Technology
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    • 제17권7호
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    • pp.958-965
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    • 2003
  • Structural integrity of either a passenger car or a light truck is one of the basic requirements for a full vehicle engineering and development program. The results of the vehicle product performance are measured in terms of ride and handling, durability, noise/vibration/harshness (NVH), crashworthiness and occupant safety. The level of performance of a vehicle directly affects the marketability, profitability and, most importantly, the future of the automobile manufacturer In this study, we used the virtual proving ground (VPG) approach for obtaining the dynamic characteristics. The VPG approach uses a nonlinear dynamic finite element code (LS-DYNA3D) which expands the application boundary outside the classic linear static assumptions. The VPG approach also uses realistic boundary conditions of tire/road surface interactions. To verify the predicted dynamic results, a single lane change test has been performed. The prediction results were compared with the experimental results, and the feasibility of the integrated CAE analysis methodology was verified.

자동차 엔진 텐션베어링에 대한 구조해석 (Structural Analysis on Tension Bearing of Automotive Engine)

  • 조재웅;한문식
    • 한국기계가공학회지
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    • 제11권5호
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    • pp.21-28
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    • 2012
  • This study analyzes about automotive engine tension bearing through the structural analyses of fatigue and vibration. Maximum equivalent stress is shown at the lower of tensioner. Among the cases of nonuniform fatigue loads, 'SAE bracket history' with the severest change of load becomes most unstable but 'Sample history' becomes most stable. In case of 'Sample history' with the average stress of 0 to $-10^{6}MPa$, the possibility of maximum damage becomes 3%. This stress state can be shown with 6 times more than the damage possibility of 'SAE Bracket history' or 'SAE transmission'. The structural result of this study can be effectively utilized with the design of tension bearing by investigating prevention and durability against its damage.

밸런스 샤프트 개발을 위한 CAE 프로세스에 관한 연구 (A Study on The CAE Process of Balance Shaft Module Development)

  • 이동원;김찬중;권성진;김완수;배철용;이봉현
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2008년도 춘계학술대회논문집
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    • pp.540-545
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    • 2008
  • The design on balance shaft module is performed based on the target specification of engine module as well as the its own dynamic nature under a high speed rotation. However, the specific information for engine module is not always available for non-motor companies even though a reliable analytical result should be attached in the conceptual design process or more detail works. In this paper, the analysis on balance shaft module, both each parts or module itself, is suggested to estimate the performance on the target component with respect to durability and NVH without any consideration of a engine module. This methodology could modify the nominal balance shaft model before the production of prototype such that cost reduction as well as time saving can be expected during design process of balance shaft module.

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초소형 광자기 드라이브용 HGA의 동적 충격 시뮬레이션 (Dynamic Shock Simulation of Head-gimbal Assembly in Micro MO Drives)

  • 오우석;홍어진;박노철;양현석;박영필
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 춘계학술대회논문집
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    • pp.189-194
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    • 2004
  • As a disk drive becomes widely used in portable environments, one of the important requirements is durability under severe environmental condition, especially, resistance to mechanical shock. An important challenge in the disk recording is to improve disk drive robustness in shock environments. If the system comes In contact with outer shock disturbance, the system gets critical damage in head-gimbal assembly or disk. This paper describes analysis of a HGA(head-gimbal assembly) in micro MO drives to shock loading during both non-operating state and operating state. A finite element model which consists of the disk, suspension, slider and air bearing was used to find structural response of micro MO drives. In the operational case. the air bearing is approximated with four linear elastic springs. The commercially available finite element solver, ANSYS/LS-DYNA, is used to simulate the shock response of the HGA in micro MO drives. In this paper, the mechanical robustness of the suspension is simuiated considering the shock responses of the HGA.

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대구경 화포용 소음기 개발을 위한 실험적 연구 (Experimental Study for Developing Silencer Adapted by Large Caliber Gun)

  • 이해석;박성호
    • 한국소음진동공학회논문집
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    • 제25권9호
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    • pp.593-598
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    • 2015
  • In this paper, the silencer for large caliber gun to reduce the propagation of gun-generated noise was studied. The results of structural analysis and firing test were described. Structural analysis was conducted by using a commercial program, ANSYS, and showed that there was not any structural problem. The sound pressure level was diminished about 10 dB by the silencer adapted in front of the gun and the soundness of the material was verified from the internal pressure measurement. The reduction of weight, improvement of durability and speed-up of actuating device have to be studied later to improve the usability of silencer for large caliber gun.

계기판의 환경 시험 후 소음 양상에 관한 시험적 연구 (The Experimental Study on the Squeak & Rattle Noise Changes with Environment Test of Cluster)

  • 김병진;문남수;박진성;박현우;김문삼
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2012년도 춘계학술대회 논문집
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    • pp.283-287
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    • 2012
  • Recently, Most of diverse noise of vehicles has decreased competitively according to development of the automotive manufacturing technology. Especially, Passenger car manufacturers has been conducting buzz, squeak and rattle(BSR) noise test as a method of the noise evaluation tests to reduce an unpleasant sound from interior parts on the driving the car. The purpose of this paper is to confirm the change of the noise generated in the product after the reliability evaluation. Here by the BSR test procedure used the test regulation of 'G' company.

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오토바이의 머플러 형상별 구조적 안정성 (Structural Safety by Shape of Motorcycle Muffler)

  • 한문식;조재웅
    • 한국기계가공학회지
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    • 제19권1호
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    • pp.72-80
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    • 2020
  • This study performs structural and vibrational analyses on three models of motorcycle mufflers, A, B, and C, due to the pressure of exhaust gases. Model A is the common model seen on motorcycles, model B is a model with a longer outlet, and model C is a model with some curved outlets. This research shows that all models have sufficient strength at the given loading condition, and model A has the highest durability against vibration among three models. The appropriate configuration can be determined to be the most efficient by applying this result to the design of motorcycle muffler.

자동차 도어의 BSR 소음의 실험적 평가와 개선 (Experimental Evaluation of Buzz, Squeak and Rattle Noise of Vehicle Doors and Its Prevention)

  • 신수현;정성수;정철웅
    • 한국소음진동공학회논문집
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    • 제17권12호
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    • pp.1217-1222
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    • 2007
  • With recent advance in automotive noise control engineering reducing major sound sources in the vehicle, customers perceive Buzz, Squeak and Rattle (BSR) as one of important indicators of vehicle quality and durability. As the long-term goal, we expect to establish the integrated design cycle for the reduction of the BSR noise in the early stage of vehicle development. which consist of design, prediction and evaluation procedures. This is possible only with great bulk of experimental data for BSR noise. In this paper, BSR noise is experimentally identified for vehicle doors, which have been traditionally considered as one of main sources of BSR noise. Based on this result, we proposed systematic method for the prevention of BSR noise in the vehicle doors.

복합재료 헬리콥터 로터 블레이드의 저진동 설계에 관한 연구 (Structural Dynamic Analysis of Low Vibrating Composite Helicopter Rotor Blades)

  • 기영중;심정욱;이명규
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 추계학술대회논문집
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    • pp.902-905
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    • 2004
  • Recently, the composite materials are widely used for manufacturing the helicopter rotor blades. furthermore, composites show great potential on the design of rotor blades due to the advantages of strength, durability and weight of the materials. To keep with this advantages, it is necessary to calculate natural frequencies of a rotating blades for avoiding resonance. In this paper, the structural design process of airfoil cross section is introduced, and natural frequencies of composite rotor blades with variable rpm we investigated.

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