• Title/Summary/Keyword: Automobile Door

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Experimental Study on Power Flow Analysis of Vibration of an Automobile Door (자동차 도어 진동의 파워흐름해석에 대한 실험적 연구)

  • Kil, H.G.;Lee, Y.H.;Lee, G.H.;Hwang, S.G.;Hong, S.Y.;Park, Y.H.;Seo, J.K.;Chae, G.S.;Seo, S.H.
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2006.05a
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    • pp.782-785
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    • 2006
  • The Power Flow Analysis(PFA) can be effectively used to predict structural vibration in medium-to-high frequency range. In this paper, Power Flow Finite Element Method (PFFEM) based on PFA has been used to predict the vibration of an automobile door. The predicted results for the frequency response function of the door have been compared with corresponding experimental results. In the experiment, the automobile door has been divided into several subsystems and the loss factor of each subsystem has been measured. The input mobility at a source point has been also measured. The data for the loss factors and the input mobility have been used as the input data to predict the vibration of the automobile door with PFFEM. The frequency response functions have been measured over the surface of the door. The comparison between the experimental results and the predicted results for the frequency response functions showed that PFFEM could be an effective tool to predict the structural vibration.

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Study on the Friction Wear Characteristic of the Surface of Door guide rail for Automobile (자동차용(自動車用) Door guide rail 표면의 마찰마모 특성에 관한 연구)

  • Han, Chang-Woo;Son, Jae-Hwan
    • Journal of the Korean Society of Industry Convergence
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    • v.10 no.1
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    • pp.33-38
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    • 2007
  • Door guide rail is the core part which guides window when it moves up and down. But when the method of grease lubrication in the core has been used for a long times, its lubrication performance has been weakened. Therefore the method of the solid lubrication such as teflon(PTFE) coating in the rail has been studied to be increased the performance in these days. In this study the friction wear characteristic the surface with teflon coating of door guide rail for automobile has been researched. In 1, 20 Hz frequency friction wear tests the friction coefficient are below 0.188 and 0.213. In indicate test the wear depth is very slight. Therefore the durability to the friction wear in the surface with teflon coating of door guide rail is good. In addition to, the result of this study can make efficient use to a basic study to develop method of test evaluation to door guide rail surface grade. Especially this study will contribute to improve the quality of automobile parts.

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A Study on the Structural Analysis for Plastic Door Handle of Automobile (플라스틱 자동차 손잡이 구조물의 구조해석에 관한 연구)

  • Park, S.R.;Shim, D.C.;Kim, D.;Lyu, M.Y.
    • Transactions of Materials Processing
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    • v.19 no.3
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    • pp.185-190
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    • 2010
  • Application of CAE analyses are wide spread in shaping processes and structural safety verification of plastic products. The importance of CAE analysis and its contributions are getting increase since the processibility and structural safety of product can be predicted. CAE analysis for complex shaped product need a lot of time for modeling and computation compare with simpler one. Therefore careful simulation modeling is required for complex shaped product. Structural analysis for plastic door handle of automobile has been performed and structural safety has been investigated for various load directions and modeling cases. Large stress occurred at the hinge in handle regardless of load direction and modeling case. Consequently hinge is considered structurally very weak among the parts in plastic door handle. It is concluded that simple modeling rather than total modeling with adequate boundary condition equivalent to real situation gives reasonable computational results with saving modeling effort and computation time.

Establishment of an Occupant Analysis modeling for Automobile Side Impact Using ATB Software (ATB 소프트웨어를 이용한 측면충돌시 승랙거동해석 모델링의 확립 및 분석)

  • 임재문;최중원;박경진
    • Transactions of the Korean Society of Automotive Engineers
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    • v.4 no.6
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    • pp.85-96
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    • 1996
  • Most protection systems such as seat belts and airbags are not effective means for side structure. There has been significant effort in the automobile industries in seeking other protective methods, such as stiffer structure and padding on the door inner panel. Therefore, a car-to-car side impact model has been developed using ATB occupant simulation program and validated for test data of the vehicle. Compared to the existing side impact models, the developed model has a more detailed vehicle side structure representation for the more realistic impact response of the door. This model include impact bar which effectively increases the side structure stiffness without reduction of space between the occupant and the door and padding for absorbing impact energy. The established model is applied to a 4-door vehicle. The parameter study indicated that a stiffer impact bar would reduce both the acceleration-based criteria, such as thoracic trauma index: TTI(d), and deformation-based criteria, such as viscous criterion(VC). Padding on the door inner panel would reduce TTI(d) while VC gives the opposite indication in a specified thickness range. For a 4-door vehicle, the stiffness enhancement of B-pillar is more beneficial than that of A-pillar for occupant injury severity indices.

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The Automotive Door Design with the ULSAB Concept Using Structural Optimization (구조 최적 설계기법을 이용한 ULSAB 개념의 자동차 도어 설계)

  • 신정규;송세일;이권희;박경진
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2000.04b
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    • pp.187-194
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    • 2000
  • Weight reduction for an automobile body is being sought for the fuel efficiency and the energy conservation. One way of the efforts is adopting Ultra Light Steel Auto Body (ULSAB) concept. The ULSAB concept can be used for the light weight of an automobile door with the tailor welded blank (TWB). A design process is defined for the TWB. The inner panel of door is designed by the TWB and optimization. The design starts from an existing component. At first, the hinge and inner reinforcements are removed. In the conceptual design stage, topology optimization is conducted to find the distribution of variable thicknesses. The number of parts and the welding lines are determined from the topology design. In the detailed design process, size optimization is carried out to find thickness while stiffness constraints are satisfied. The final parting lines are determined by shape optimization.

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Plastic Flow Prediction of Automobile Door-Handle Using Injection Molding Simulation Programs (플라스틱 유동해석 프로그램을 이용한 자동차 도어 핸들의 유동예측)

  • 한성렬;강철민;유호종;정영득
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.295-298
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    • 2004
  • Automobile door-handle is assembled with three parts that are base, skin and cover. Over-molding processing makes assembly of the base and skin. The skin part that was made by PVC polymer has various thickness. Plastic injection molding simulation of part including significant changed thickness as skin is an inaccuracy comparing with real injection molding. To solve this problem, two commercial flow prediction software that are Moldflow MPI and MAPS 3D were used in this study. Simulations were conducted for three types mesh. Taguchi method was applied for simulation experiments. It will be need to compare with simulation results and real over-molding behavior in the near future.

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