• Title/Summary/Keyword: eccentric

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On the Free Vibration of Immersed Linearly Tapered Beam with a Tip Mass (첨단 질량을 갖는 선형 원뿔대의 자유진동)

  • Shin, Young-Jae;Sung, Kyung-Yun;Yun, Jong-Hak
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2002.11a
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    • pp.402.1-402
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    • 2002
  • A linearly tapered beam immersed partially in other material is considered and is modelled as a linearly tapered Bernoulli-Euler beam fixed at the bottom with a concentrated mass at the top. Its governing equations is derived and its free vibration analysis is performed for various boundary conditions. And the rotatory inertia of the eccentric lumped tip mass is considered. (omitted)

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A Study on Axial Force - Moment Capacity of High-Strength Concrete Tied Column Sections (고강도 콘크리트 기둥단면의 축력-모멘트 강도에 관한 연구)

  • 박해균;박동규;박영식;손영현;이재훈
    • Proceedings of the Korea Concrete Institute Conference
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    • 1996.04a
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    • pp.300-305
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    • 1996
  • Reinforced concrete column is an effective structural element to take advantage of high strength concrete. This paper presents an experimental and analytical strength of high strength concrete rectangular tied column sections under eccentric loading. The test variables are concrete strength, steel ratios, slenderness and eccentricity. The analytical results of the ACI's rectangular stress block, Zia's modified rectangular stress block, and a trapezoid block are compared with experimentally obtained data. It may be concluded that the trapezoid stress block provided the most reasonable column section capacities for high strength concrete columns.

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Heat Transfer Analysis of the Radiation Shield in Cryogenic Systems (극저온 시스템의 복사쉴드의 열전달 해석)

  • 정은수;장호명;박희찬;양형석
    • Progress in Superconductivity and Cryogenics
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    • v.4 no.1
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    • pp.124-128
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    • 2002
  • A numerical model to obtain the temperature distribution in a radiation shield of cryogenic systems was proposed. Conformal mapping was used to transform the eccentric physical region of the upper plate to the concentric numerical region. The effects of the thickness of the radiation shield, the emissivities of the vacuum chamber and the radiation shield, and the eccentricity between the centers of the upper plate and the contact area with a cryocooler on the maximum temperature difference in a radiation shield were shown.

Hydrodynamic Lubrication Analysis of a Small Rotary Compressor (소형 회전식 압축기의 동수압적 윤활해석)

  • 송기선;장시열;한동철
    • Tribology and Lubricants
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    • v.4 no.1
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    • pp.74-80
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    • 1988
  • For an analytic investigation on the dynamic behaviour of the eccentric piston and roller in the cylinder of small rotary vane compressors the hydrodynamic lubrication theory is opplied, analogous to the dynamic analysis of a engine bearing. An adequate modification of the equation of journal motion permits stable convergencies of the numeric calculation of the journal orbits. The increase of the outer diameter of the roller and the eccentricity of the piston gives a relative large decrease of the minimum gap between the roller and cylinder.

Photometric Observations of Eccentric Accretion in Algol-type Binary Stars

  • Reed, Phillip A.
    • Journal of Astronomy and Space Sciences
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    • v.29 no.2
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    • pp.141-143
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    • 2012
  • Some Algol-type interacting binary stars exhibit strange photometric variations that can be phase-dependent and/or secular. This paper discusses the possibility of explaining these observed variations as resulting from an accretion structure eclipsing one or both of the stars. Some previous studies are reviewed and suggestions for future work are made, including the prospective of incorporating data from the Kepler Observatory.

An Experimental Study on Eccentrically Loaded Steel Fiber Reinforced Concrete Columns (편심축하중을 받는 강섬유보강 콘크리트 기둥의 실험적 연구)

  • 박홍용;안영진
    • Proceedings of the Korea Concrete Institute Conference
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    • 2000.10b
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    • pp.857-860
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    • 2000
  • An experimental study on the behavior of Steel Fiber Reinforced Concrete Columns under eccentric compression are presented. Forth-one columns were tested; the variables were column type, eccentricity of load, fiber contents, and longitudinal reinforcement ratio. The column size was $250\times160$ mm in cross section with an effective length of 1150 mm. Eccentricity of load was varied in the range from 1/6 to 1/2 times the column depth. This paper is to provides a framework for basic understanding of the steel fiber concrete columns.

Experimental Investigation on the Creep Behavior of Pultruded FRP Composite Columns (인발성형 FRP 복합소재 기둥부재의 크리프거동에 대한 실험적 분석)

  • Kang, Jin Ook;Abdul Hamid Zureick
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2003.10a
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    • pp.299-306
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    • 2003
  • This paper presents the results of an experimental investigation pertaining to the creep behavior of fiber-reinforced polymeric (FRP) pultruded components subjected to sustained eccentric axial loading. Six different axial load/eccentricity combinations were investigated through the experiments. The test duration of these experiments was 2,000 hours (90 days), during which the mid-height lateral deflections of the components were recorded continually. Analytical formulations based on the Schapery's quasielastic method and a power law model were used for the prediction of the creep lateral deflection.

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Design of space truss structures

  • El-Sheikh, Ahmed
    • Structural Engineering and Mechanics
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    • v.6 no.2
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    • pp.185-200
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    • 1998
  • Space truss design usually involves two main assumptions: that truss members are pin-ended, and compression members possess brittle post-buckling characteristics. The validity of these assumptions in the design of a new group of space trusses with continuous chords and eccentric joints is questionable. With chord member continuity and the consequent improvement in compression member behaviour, current design practice might be too conservative. In this paper, it is shown that substantial improvements in overall truss strength have resulted when the true member end conditions are considered, thus indicating potential savings in truss weight with considerable magnitudes.

A Study on Detection of Runout Eccentric Error Using CCS Sensor at CNC Lathe (CNC선반에서 주축변위센서를 이용한 가공편심오차의 검출에 관한 연구)

  • 양재생;맹희영
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2002.10a
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    • pp.468-473
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    • 2002
  • This paper presents the methodology for measuring eccentricity of the cylindricaliy machined part using CCS(Cylindrical Capacity Spindle Sensor) signal in the CNC turning process. In order to investigate the relationships between CCS orbits and eccentricities, the initial conditions for various eccentricity state and machining process is applied to the experimental strategy. AS a result, it is considered the linearities of CCS signal and magnitude of eccentricity of machined cylindrical surfaces based on the possibility as a automatic detection apparatus for the CNC lathe.

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Compression Osteosynthesis로 하악골골절을 치료한 경우 골절선상의 치아가 감염에 미치는 영향

  • Choi, Byung-Ho;Yoo, Jae-Ha;Yoon, Jung-Ho
    • The Journal of the Korean dental association
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    • v.32 no.1 s.296
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    • pp.69-74
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    • 1994
  • Fifty-one patients with fracture of mandible were treated by rigid internal fixation using AO Eccentric Dynamic Compression Plate. All teeth in the fracture line were left in all patients. None of patients were placed into maxillomancibular fixation. Two patients postoperatively developed infection (3.9%). The use of the AO EDCP for the fracture of mandible was found to be useful to prevent the infection, even permitting maintenance of the teeth in the line of fracture.

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