• Title/Summary/Keyword: Seat Frame

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A Study on the Durability Design of an Automotive Seat Frame (자동차 시트 프레임 구조의 내구성 향상 설계에 관한 연구)

  • 우창수;조현직;구정서;권재도
    • Transactions of the Korean Society of Automotive Engineers
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    • v.12 no.4
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    • pp.50-57
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    • 2004
  • Structural analysis and fatigue tests have been performed to develop design and evaluation technologies of automotive seat frames. Under the back moment loading condition, the numerical simulation unveiled the maximum stress up to the yield strength at the side frame bracket. To measure the stresses under the test condition, strain gauges were attached to some weakest points of the side frames. the measured strains are in good agreements with the CAE results. On the other hand, some fatigue tests have been performed using the side frame bracket specimens made of various welding types to evaluate their durabilities. From the fatigue tests and the numerical analyses, it was recommended that the bracket welding position should be moved upward.

A Study on Structure and Vibration Analysis of an Air Suspension Seat (에어 서스펜션 시트의 구조 및 진동해석에 관한 연구)

  • Ha, Jung-Soo;Lee, Gun-Myung
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.16 no.6
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    • pp.47-54
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    • 2017
  • This study analyzed air suspension seat frame structure and vibration for 50 - 180 kg mass driver to obtain optimum seat design parameter values for the equivalent spring constant and damping coefficient. Various air suspension seat frames were designed following WTS-003 and KS B 6839 standards, and then evaluated using finite elements analysis. Resonance and vibration tests were performed according to the 78/764/EEC standard.

A Study on CAE for the Design of the Seat Frame of Fiber-reinforced Composite Material (첨단섬유강화 복합재료 시트프레임 설계를 위한 CAE 연구)

  • 허용정;이순홍;최금호
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.10a
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    • pp.933-937
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    • 1995
  • The design of injection molded prlymeric parts has been done empirically, since it requires profound knowledge about the moldability and causal effects on the properties of the parts. This study shows CAE approach for the design of the seat frame of fiber-reinforced composite material in order to realize the concept os rationsl design for the productivity and quality of mold making. The knowledge-based CAE system is constructed by adding the knowledge-basw module for the design evaluation and appropriate CAE programs for mold design analysis in order to provied designers, at the initial design stage, with comprehensive process knowledge for the performance analysis and the design evaluation. A knowledge-based CAE system is a new tool which enables the concurrent design with integrated and balanced design decisions at the initial design stage of injection molding.

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Structural Analysis and Evaluation Technologies of Automotive Seat Frames (자동차 시트 프레임의 강도설계 및 평가기술 개발)

  • Woo, C.S.;Koo, J.S.;Cho, H.J.;Kim, H.S.;Jeong, J.H.
    • Proceedings of the KSME Conference
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    • 2001.06a
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    • pp.806-811
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    • 2001
  • To develop design and evaluation technologies of automotive seat frames, structural analysis and fatigue tests have been performed. Under the back moment loading condition, the numerical simulation yielded the maximum stress over the yield strength at the side frame bracket. To measure the stresses under the test condition, strain gauges were attached on some weakest points of the side frames. the measured strains are in good agreements with the CAE results. On the other hand, fatigue tests have been performed using the side frame bracket specimens made of various welding types to estimate their durabilities. From the fatigue test results and the analysis ones, it was recommended that the welding position of the bracket should be moved upward.

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Optimal Design for Torsional Stiffness of the Tubular Space Frame of a Low-Cost Single Seat Race Car (저가 입문용 1인승 레이스카 Tubular Space Frame의 비틀림 강성 최적설계)

  • Jang, Woongeun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.10
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    • pp.5955-5962
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    • 2014
  • Generally, the frame design of a vehicle is a critical technology that plays an important role in the racing and high performance sports car market. The high performance of race car frame means that it requires high torsional stiffness because it directly affects the cornering behavior of the race car. The optimal design for the frame of a low-cost single seat race car was carried out using the DOE (Design Of Experiments) with Taguchi's orthogonal array and FEM (Finite Element Method) analysis to secure sufficient torsional stiffness in this paper. According to the results by DOE and FEM analysis, the optimal design case produced improved 10.7% and 14.5% improvement in each stiffness-to-weight ratio and frame weight than in the early design step. Therefore, this paper shows that the optimal design with Taguchi's orthogonal array is very useful and effective for designing a tubular space frame of a low-cost single seat race car in the early design step.

A Study on the Structural Design of a Seat frame in Automotive Vehicles (승용차 시트프레임의 구조설계에 관한 연구)

  • 김홍건;조영태;최금호;이병휘
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 1999.05a
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    • pp.159-163
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    • 1999
  • A seat frame structure in automotive vehicles made of polymer matrix composite to achieve weight reduction at low cost was developed. In order to design and manufacture the actual product, studies on material selection, and structural analyses were performed. Structural analyses were performed with a finite element analysis. Analyses were done for several cases suggested in various safety regulations of FMVSS(Federal Motor Vehicle Safety Standards). Each result was utilized to modify the actual shape to obtain a lighter, safer and more stable design. The final design was used to produce a sample bottom plate of the seat structure. Substitution of the material resulted in a weight reduction effect with equivalent strength, fatigue and impact characteristics. Furthermore, several effects from the replacement of the material besides weight reduction were also examined.

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Strength Analysis of Luggage Intrusion into Recreational Vehicle Seat (RV 차량 시트의 적재물 침입 강도해석)

  • Bae Jinwoo;Kang Sungjong
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.4
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    • pp.160-166
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    • 2005
  • In recent, recreational vehicles, which efficiently provide wide inner space for various utilities, are highly preferred in automobile market. Though those vehicles enable to load much luggage in space behind the last seat, in case of frontal impact with high velocity the luggage strongly collides into the seat back and the passengers in. the last seat could be severely injured. Therefore, high strength against luggage intrusion is required for the last seat, and it is regulated by law of ECE R17. In this study, for a recreational vehicle under developing, an analysis technique for simulating seat crash in accordance with luggage intrusion test of ECE R17 was investigated. The results exhibited good correlation with the test ones.

Structural Durability Analysis According to the Thickness of Bicycle Frame Tube (자전거 프레임 튜브 두께에 따른 구조적 내구성 해석)

  • Cho, Jae-Ung;Han, Moon-Sik
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.11 no.3
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    • pp.122-129
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    • 2012
  • This study investigates structural and vibration analyses according to the thickness of bicycle frame tube. The model of bicycle frame has the dimension as length of 862mm, width of 100mm and hight of 402.5mm. There are 3 kinds of models with tubes of top, down and seat at bicycle frame as thicknesses of 10, 15 and 20mm. The maximum displacement and stress occur at the center part of seat stay and at the installation part of rear wheel respectively. Maximum displacements become 0.031936, 0.029159 and 0.027984mm in cases of thicknesses of 10, 15 and 20mm respectively. In case of thickness of 20mm among 3 cases, maximum displacement becomes lowest. But maximum stresses become 10.019, 8.5492 and 9.2511MPa in cases of thicknesses of 10, 15 and 20mm respectively. In case of thickness of 15mm among 3 cases, maximum stress becomes lowest. There is no resonance at practical driving conditions and natural frequency remains almost unchanged along the change of thickness. In case of the displacement due to vibration mode, the displacement difference at thickness between 15mm and 20mm becomes 1/2 times than that between 10mm and 15mm. Design at bicycle frame tube becomes most economical and durable effectively in case of thickness of 15mm among 3 cases.