• 제목/요약/키워드: Seat Frame

검색결과 89건 처리시간 0.023초

고장력 강판을 적용한 Seat Back Frame의 레이저용접에 관한 연구 (A Study on Laser Welding of the Seat Back Frame Applied by High Strength Steels)

  • 설현욱;정병훈;김석원
    • Journal of Welding and Joining
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    • 제35권3호
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    • pp.62-67
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    • 2017
  • The automotive industry is in constant pursuit of alternative materials and processes to address the ever changing needs of their customers and the environment. Applications of laser welding have increased steadily in recent years due to its benefits including high speed, high productivity, and high energy density of heat source. This paper investigated the relationship between laser welding parameters and penetration characteristics. The Welding power was fixed at 5kW and welding speeds were varied for the thickness of the workpiece material. Full penetration occurred in the energy per unit area of $21J/mm^2$. The hardness of the weld zone was different for each strength of the workpiece material, however the lowest hardness values were the same in the heat-affected zone.

자작형 하이브리드카의 제작 및 제어에 관한 연구 (A Study on Manufacture and Control of a Self Manufacturing Hybrid Electric Vehicle)

  • 김학선;정찬세;양순용
    • 한국자동차공학회논문집
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    • 제20권1호
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    • pp.8-13
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    • 2012
  • In this paper, Hybrid Electric Vehicle is directly designed and manufactured for base study of HEV's system and Green Car. Foundation design consists of power train design and the frame design. The power train concept includes motor, engine, generator and battery. And the concept of the frame is the single-seat of this self-made HEV. A frame installed in hybrid system contains suspension, steering wheel, seat, accelerating pedal, brake pedal, clutch handle and various chassis parts with bearings. Electromagnetic clutch is equipped to transmit engine power to drive axle. The control algorism make using LabVIEW to control of an engine and a motor depending on drive condition. A parallel type hybrid system is manufactured to control operation of a motor and an engine depending on vehicle speed.

자전거 프레임 특정부분의 보강효과와 프레임에 미치는 응력과 변형 연구

  • 김태훈;양동민;하윤수
    • EDISON SW 활용 경진대회 논문집
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    • 제4회(2015년)
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    • pp.207-211
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    • 2015
  • In this paper, 2 kinds of models about bike frame are simulated with static structural analysis. A bike frame with diamond type is compared with another model that Down tube is eliminated from original diamond frame. About both types of models, Property of a material and conditions of restriction & load are the same. This study shows reinforcement effects of a partial frame by adding down tube and impacts generated by applying a load at the frame such as weak points & high stress parts as well as expected deformation. The structural result of this study indicates that the equivalent stress or total deformation decreases by 57.1% or 36.4%, respectively. Also stress concentration sites are leg connecting parts, front/rear wheels fixed region and Max deformation is generated from Seat tube. In conclusion, A Down tube is highly efficient as reinforcement than frame without non down tube. Furthermore, The safety rises in case of reducing top tube thickness and increasing a reinforcement at leg connecting parts or concentration regions.

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ATV용 완충 프레임의 개발 (Development of Buffer frame for ATV)

  • 김준안;전재억;고성우
    • 한국기계가공학회지
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    • 제10권6호
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    • pp.159-164
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    • 2011
  • This paper is about the frame for an all terrain vehicle(ATV). An all terrain vehicle, also known as an ATV, has a seat designed to comfortably accommodate a rider over a wide variety of rugged terrain. This study developed and evaluated a buffer system to drive safely and reduce impact force on the load. The Frame includes a main frame portion which has one or more support frames. The buffer system with a double cushion system, one or more of the interaction of the shock absorber is constructed. The 3D modeling of ATV frame is built up with the software CATIA. According to the designing requirement, we analyzed the stress and the deformation of the frame.

상·하부 ㄱ형강 반강접 CFT 기둥-보 접합부의 단조 및 이력거동 (Monotonic and Hysteresis Behavior of Semirigid CFT Column-to-Beam Connections with a Top-Seat Angle)

  • 이성주;김주우
    • 한국강구조학회 논문집
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    • 제26권3호
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    • pp.191-204
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    • 2014
  • 본 논문에서는 반복하중을 받는 CFT 합성골조에서 부분강접 접합부인 상 하부 ㄱ형강 접합부의 휨모멘트 내력을 구하기 위하여 체계적인 수치해석이 수행되었다. 고강도강 연결봉으로 조립된 합성 부분강접 CFT 접합부의 회전강성, 휨모멘트 내력 및 파괴모드를 연구하기 위하여 3차원 비선형 유한요소 해석이 수행되었다. 부가적인 다양한 구조적 거동은 ㄱ형강의 두께 및 고강도 강봉 게이지 거리로 상 하부 ㄱ형강 접합의 파라미터에 대한 영향을 설명하고 있다. 해석모델의 적합성은 유한요소해석 결과로부터 얻은 모멘트-회전각 곡선을 Richard의 회귀분석을 통하여 비교 분석하였다.

단신 : 사이클 피팅을 위한 전동 승차 조절기 개발 (Technical Note : Development of Electric Riding Machine for Cycle Fitting)

  • 배재혁;최진승;강동원;서정우;탁계래
    • 한국운동역학회지
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    • 제22권3호
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    • pp.373-378
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    • 2012
  • The purpose of this study was to develop an electric riding machine for cycle fitting to control riding posture easily, to measure frame size quantitatively, and to overcome disadvantages of the traditional systems. The electric riding machine consisted of actuator, load controller, and display & control unit. The actuator unit by BLDC(BrushLess Direct Current) motor drives the saddle height up and down, the crank forward and backward, the handlebar up and down, and the handlebar forward and backward. The load controller unit controls loads by Eddy current controller with electromagnet and aluminum circular plate. The display & control unit consisted of frame size controller and display panel which shows top tube length(485~663mm), head tube length(85~243mm), seat tube length(481~671mm), and seat tube angle($62.7{\sim}76.4^{\circ}$). The range of frame size control for developed electric riding machine did not have difference compared to traditional commercial systems, but quantitative and precise control with 0.1 mm length and $0.1^{\circ}$ angle was possible through digital measurement. Unlike traditional commercial systems, frame size control was possible during riding through motor driven method, thus fitting duration decreased. It is necessary for further improvement to have feedback from users. It is believed that developed electric riding machine can help to develop domestic fitting system.

유한요소해석을 이용한 차량용 파워 시트 리클라이너의 방사 소음에 관한 연구 (A Study on Radiation Noise of Vehicle Power Seat Recliner using Finite Element Analysis)

  • 김성육;김기선
    • 한국기계가공학회지
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    • 제17권1호
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    • pp.101-107
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    • 2018
  • In this study, the analysis of radiation noise and chattering noise of vehicle seat recliner was conducted through testing and analysis. First, operating noise was measured by seat back frame and recliner, and chattering noise was confirmed. Next, the transient dynamic analysis was performed, and the result was mapped to the acoustic analysis. Finally, the test and analysis were compared and analyzed. The results are as follow. First, it was found that the peaks appeared in common in the range of 620~650Hz, 1,240~1,290 Hz, and 1,840~1,940 Hz. It was judged that the dynamic characteristics of the recliner system overlapped with the rotation component of the motor to cause amplification of noise and vibration. Next, as a result of imaging the radiation noise analysis, it was judged that the noise radiated in the forward and backward direction has a greater influence than the direction of the rotation axis when the ear position of the person is taken as a reference.

충돌을 고려한 안전띠 일체형 의자의 다분야 통합최적설계 (Application of a Multidisciplinary Design Optimization Algorithm to Design of a Belt Integrated Seat Considering Crashworthiness)

  • 신문균;강병수;박경진
    • 대한기계학회논문집A
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    • 제29권3호
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    • pp.395-402
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    • 2005
  • Recently Multidisciplinary Design Optimization Based on Independent Subspaces (MDOIS), an MDO (multidisciplinary design optimization) algorithm, has been proposed. In this research, an MDO problem is defined for design of a belt integrated seat considering crashworthiness, and MDOIS is applied to solve the problem. The crash model consists of an airbag, a belt integrated seat (BIS), an energy absorbing steering system, and a safety belt. It is found that the current design problem has two disciplines - structural nonlin- ear analysis and occupant analysis. The interdisciplinary relationship between the disciplines is identified and is addressed in the system analysis step in MDOIS. Interdisciplinary variables are belt load and stiffness of the seat, which are determined in system analysis step. The belt load is passed to the structural analysis subspace and stiffness of the seat back frame to the occupant analysis subspace. Determined design vari- ables in each subspace are passed to the system analysis step. In this way, the design process iterates until the convergence criterion is satisfied. As a result of the design, the weight of the BIS and Head Injury Crite- rion (HIC) of an occupant are reduced with specified constraints satisfied at the same time. Since the system analysis cannot be formulated in an explicit form in the current example, an optimization problem is formu - lated to solve the system analysis. The results from MDOIS are discussed.

자동차 시트의 플라스틱 서스펜션 매트의 진동과 피로해석에 관한 연구 (Study on Vibration and Fatigue Analysis for Plastic Suspension Mat of Automotive Seat)

  • 최해규;김기선;김세환;조재웅
    • 한국산학기술학회논문지
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    • 제13권2호
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    • pp.504-509
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    • 2012
  • 본 자동차 서스펜션 매트는 자동차 시트 백 프레임에 장착되며, 탑승자의 등 부위에 가해지는 압력을 시트서스펜션 매트로 받쳐줌으로써 압력이 집중되는 것을 방지하여 운전시 피로감을 최소화하고, 안락감을 증대할 수 있는 역할을 한다. 본 연구에서는 플라스틱 재질로 개발된 서스펜션 매트를 3D 모델링 하고, 진동 및 피로해석을 수행하였다. 해석 결과 플라스틱 서스펜션 매트의 고유 진동수는 30 Hz, 수명은 $10^6$ Cycle, 안전계수는 1.6055의 해석 결과를 얻었다. 이러한 해석적 기법을 활용하면 시트 설계 부분에서 그 개발 시간 및 평가 비용을 절감할 수 있을 것으로 사료된다.

SMA 적용 상·하부 ㄱ형강 CFT 기둥-보 접합부의 내진성능 (Seismic Performance of Top and Seat Angle CFT Column-to-Beam Connections with SMA)

  • 김주우;이성주
    • 한국강구조학회 논문집
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    • 제29권6호
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    • pp.423-434
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    • 2017
  • 본 논문에서는 반복하중을 받는 부분강접 접합부인 상 하부 ㄱ형강 접합부의 이력거동을 구하기 위하여 체계적인 수치해석이 수행되었다. 이러한 상 하부 ㄱ형강 접합부는 CFT 합성골조의 원상복원 및 충분한 에너지 소산 능력을 확보하기 위하여 초탄성 성질을 갖는 형상기억합금(SMA)으로 제작된 봉과 ㄱ형강이 적용된다. 접합부의 회전강성, 휨모멘트 내력 및 파괴모드를 연구하기 위하여 3차원 비선형 유한요소 해석이 수행되었다. 부가적인 다양한 구조적 거동은 ㄱ형강의 두께 및 강봉 게이지 거리로 상 하부 ㄱ형강 접합의 파라미터에 대한 영향을 설명하고 있다.