• 제목/요약/키워드: Transverse

검색결과 4,733건 처리시간 0.025초

Design of PM Excited Transverse Flux Linear Motor of Inner Mover Type

  • Kang Do-Hyun;Ahn Jong-Bo;Kim Ji-Won;Chang Jung-Hwan;Jung Soo-Jin
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • 제5B권2호
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    • pp.137-141
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    • 2005
  • A transverse flux, PM-exited linear motor (TFM-LM) with inner mover was designed and built. Its output power density is higher and its weight is lower than those of the conventional PM exited linear synchronous motors (PM LSM). To obtain the maximum thrust force under the given volume, the thrust force density with respect to the ratio of the slot width and the length of pole pitch is analyzed by the 3-dimension finite element method (FEM). Finally, calculated static thrust forces was compared with the experimental values. The calculated and measured performance of the transverse flux, PM-exited linear motor with inner mover revealed great potential for system improvements by reducing the mass of the linear motor. For examples, when this motor was applied to a ropeless elevator, it was possible to increase the power density by more than 400% over the conventional PM-LSM. The results of this study recommend this type of motor for the ropeless elevator or gearless direct linear driving system.

Study on seismic behavior and seismic design methods in transverse direction of shield tunnels

  • He, Chuan;Koizumi, Atsushi
    • Structural Engineering and Mechanics
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    • 제11권6호
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    • pp.651-662
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    • 2001
  • In order to investigate the seismic behavior and seismic design methods in the transverse direction of a shield tunnel, a series of model shaking table tests and a two-dimensional finite element dynamic analysis on the tests are carried out. Two kinds of static analytical methods based on ground-tunnel composite finite element model and beam-spring element model are proposed, and the validity of the static analyses is verified by model shaking table tests. The investigation concerns the dynamic response behavior of a tunnel and the ground, the interaction between the tunnel and ground, and an evaluation of different seismic design methods. Results of the investigation indicate that the shield tunnel follows the surrounding ground in displacement and dynamic characteristics in the transverse direction; also, the static analytical methods proposed by the authors can be used directly as the seismic design methods in the transverse direction of a shield tunnel.

복횡근의 강화운동과 고유수용성신경근촉진법을 이용한 호흡저항운동이 뇌졸중 환자의 폐기능과 정적인 앉은자세에 미치는 영향 : 증례보고 (Resistive breathing exercise using transverse abdominis strengthening and P.N.F affects pulmonary functions and static sitting posture of adult stroke patient : a case report)

  • 이병기
    • PNF and Movement
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    • 제8권3호
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    • pp.49-54
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    • 2010
  • Pupose : This study aimed to examine the Influence of stregthening for Transverse abdominis and resistive breathing exercise to use PNF on fulmonary functions and static sitting posture in adult stroke patient. Methods : Left hemi-plegic patient was masured pulmonary function test and analyzed sitting posture of alignment at pre intervention and post-intervention in 4weeks. Results : The pulmonary functions was increased and changed good alignment of trunk on sitting position after treatments. Conclusion : We were found that stregthening for Transverse abdominis and resistive breathing exercise to use PNF could improve pulmonary functions and sitting posture for stroke patient.

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Exact solution for transverse bending analysis of embedded laminated Mindlin plate

  • Heydari, Mohammad Mehdi;Kolahchi, Reza;Heydari, Morteza;Abbasi, Ali
    • Structural Engineering and Mechanics
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    • 제49권5호
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    • pp.661-672
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    • 2014
  • Laminated Rectangular plates embedded in elastic foundations are used in many mechanical structures. This study presents an analytical approach for transverse bending analysis of an embedded symmetric laminated rectangular plate using Mindlin plate theory. The surrounding elastic medium is simulated using Pasternak foundation. Adopting the Mindlin plate theory, the governing equations are derived based on strain-displacement relation, energy method and Hamilton's principle. The exact analysis is performed for this case when all four ends are simply supported. The effects of the plate length, elastic medium and applied force on the plate transverse bending are shown. Results indicate that the maximum deflection of the laminated plate decreases when considering an elastic medium. In addition, the deflection of the laminated plate increases with increasing the plate width and length.

철근콘크리트 교각의 연성도와 심부구속철근량의 상관관계 (Relationship between Ductility and Confinement Steel of RC Bridge Columns)

  • 손혁수;한상엽;이재훈
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2002년도 가을 학술발표회 논문집
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    • pp.141-146
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    • 2002
  • The purpose of this study is to develop a reasonable design for transverse confinement reinforcement considering ductility and required transverse confinement reinforcement of RC bridge columns. In order to develop relationships between the curvature ductility and required transverse confinement reinforcement for design purpose, the analysis using the computer program NARCC have been carried out for parametric studies. Based on the results from the parametric studies, an equation for calculating the required transverse confinement reinforcement based on ductility demand was developed for seismic design of RC bridge columns. The equations proposed by this study will provide more reasonable and more effective design guidelines for performance-based seismic design of RC bridge columns.

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초속경 라텍스개질 콘크리트의 균열 억제방안 (Crack Prevention of Very-Early Strength Latex-Modified Concrete)

  • 이봉학;최판길
    • 산업기술연구
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    • 제28권A호
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    • pp.89-96
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    • 2008
  • An increase in the amount of cracking in repaired concrete bridge decks using VES-LMC(Very Early Strength - Latex Modified Concrete ; below VES-LMC) has been noticed by Yun et al(1). Literature indicates that indeed many concrete bridge decks develop transverse cracking, most developing at early ages(3~7 days), many right after construction. The purpose of this study was to establish prevention of map, transverse and longitudinal cracking in VES-LMC and to provide a control methods for minimizing the occurrence of cracks. The proposed prevention against map and transverse cracking was verified by field applications. VES cement was modified, the unit cement contents was reduced into $360kg/m^3$ from $390kg/m^3$, the maximum size of coarse aggregate was increase into 19mm from 13mm, wire mesh and steel fibers were incorporated in concrete mixture. A series of variable combinations were attempted. As a results, the proposed prevention against map and transverse cracking was verified because no crack were occurred until 90 days after overlay.

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횡단성 척수염 1례에 대한 증례보고 (One Case Report of Patients with Transverse Myelitis)

  • 정성민;신용욱;김경옥
    • 대한추나의학회지
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    • 제4권1호
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    • pp.111-117
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    • 2003
  • Objectives: We recently experienced one case of Transverse Myelitis. We would introduce the clinical report it Methods: In the point of Differentiation of Syndrome, these subjects were diagnosed as Wejeung(Weizheng;痿證). We treated here with acupuncture. moxa, physical theraphy and herbal medication Results & Conclusions: Symptoms of the patient of this report were improved after above treatment. So it is suggested that oriental medical treatment is effective in Transverse Myelitis

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Material Characterization of Weld-Zone Using Poisson's Ratio Distribution

  • Park, Jin-Ha;Kim, Young-H.;Lee, Seung-S.;Kim, Young-Gil
    • 비파괴검사학회지
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    • 제29권6호
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    • pp.586-590
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    • 2009
  • Poisson's ratio, one of elastic constants of elastic solids, has not attracted attention due to its narrow range and difficult measurement. Transverse wave velocity as well as longitudinal wave velocity should be measured for nondestructive measurement of Poisson's ratio. Rigid couplants for transverse wave is one of obstacle for scanning over specimen. In the present work, a novel measurement of Poisson's ratio distribution was applied. Immersion method was employed for the scanning over the specimen. Echo signals of normal beam longitudinal wave were collected, and transverse wave modes generated by mode conversion were identified. From transit time of longitudinal and transverse waves, Poisson's ratio was determined without the information of specimen thickness. Poisson's ratio distribution of the carbon steel weldment was mapped. Heat affected zone of the weldment was clearly distinguished from base and filler metals.

Sheet Rotor를 가진 직선형 유도전동기의 Transverse Edge Effect에 관한 연구 (A Study on Transverse Edge Effect in Linear Induction Motor With Sheet Rotor)

  • 이윤종;임달호;백수현
    • 전기의세계
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    • 제23권4호
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    • pp.39-45
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    • 1974
  • In most previous research work, the transverse edge effect has been allowed for only by use of a relativity-increase factor. This paper gives a more exact treatment. A two-dimensional-field analysis is presented for the problem of sheet rotor linear induction motor with finite width the method used takes account of flux leakage in the space between the stator and secondary sheet rotor as well as in the secondary itself. Equations are derived for the flux density distribution in the air gap and for the starting face, in each case as a function of stator current. The cross gap flux density peaks towards athe edge of the stator. This phenomena is known as the transverse edge effect. Measurements of the flux density in the air gap and starting force on a linear induction motor with sheet rotor of different width showed a reasonable agreement,suggest that it would be desirable to take into account also, at least for this motor in which severe redistribution occurs.

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열-기계-전기 하중이 완전 연계된 지능 복합재 평판의 지그재그 고차이론 (HIGHER ORDER ZIG-ZAG PLATE THEORY FOR COUPLED THERMO-ELECTRIC-MECHANICAL SMART STRUCTURES)

  • 오진호;조맹효
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2001년도 춘계학술발표대회 논문집
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    • pp.114-117
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    • 2001
  • A higher order zig-zag plate theory is developed to refine accurately predict fully coupled of the mechanical, thermal, and electric behaviors. Both the displacement and temperature fields through the thickness are constructed by superimposing linear zig-zag field to the smooth globally cubic varying field. Smooth parabolic distribution through the thickness is assumed in the transverse deflection in order to consider transverse normal deformation. Linear zig-zag form is adopted in the electric field. The layer-dependent degrees of freedom of displacement and temperature fields are expressed in terms of reference primary degrees of freedom by applying interface continuity conditions as well as bounding surface conditions of transverse shear stresses and transverse heat flux The numerical examples of coupled and uncoupled analysis are demonstrated the accuracy and efficiency of the present theory. The present theory is suitable for the predictions of fully coupled behaviors of thick smart composite plate under mechanical, thermal, and electric loadings.

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