• Title/Summary/Keyword: Running test

Search Result 1,039, Processing Time 0.028 seconds

The Study on the Running Test of Urban Transit Maglev (II) - Levitation System - (도시형 자기부상열차의 주행성능시험(II) - 부상시스템 -)

  • Lee, Jeong-Seok;Lee, Seo-Woo;Kim, Bong-Seop
    • Proceedings of the KIEE Conference
    • /
    • 1999.07a
    • /
    • pp.6-8
    • /
    • 1999
  • In this paper deals with running test for the UTM(Urban Transit Maglev)-01, that is test and evaluation for the maglev. We will predict about the test value for running maglev vhicle. In this time we tested rms gap fluctuation and peak to peak air gap for levitation system of UTM-01. And then we profit for the upgrade Maglev System.

  • PDF

Vibrational Characteristics of an End Beam of a Freight Cal- on the Taebaek Line (태백선을 주행하는 화차 엔드빔의 진동특성에 관한 연구)

  • 문경호;홍재성;이동형;서정원;함영삼
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.14 no.10
    • /
    • pp.962-967
    • /
    • 2004
  • A bogie is the device that connects a car body and wheel sets of a rail vehicle. It is the critical component that determine:; the running safety, The bogie consists of a frame, suspensions, brakes and wheel sets. Various analyses including a numerical simulation using a finite element method, a static load test, a fatigue test, ai)d r running test should be carried out to design the bogie. However cracks have been found at some end beams of the bogies mounted on the freight cars running with the high speed. The cracks of the end beam results in deterioration of the brake performance an the running safety, A new design has been suggested to solve this problem by ROTEM company and it's performance has been tested in this paper. Numerical simulations and dynamic tests are carried out to figure out the causes of cracks in the conventional bogie, and the vibrational characteristics of the improved bogie are compared with those of the conventional one.

Evaluation of Train Running Safety for Direct Fixation Concrete Track on Light Rapid Transit (경전철 직결식 콘크리트 궤도구조의 열차주행안전성 평가)

  • Choi, Jung-Youl;Kim, Jun-Hyung;Chung, Jee-Seung;Lee, Sun-Gil
    • Journal of the Korean Society of Safety
    • /
    • v.32 no.5
    • /
    • pp.41-46
    • /
    • 2017
  • The coefficient of derailment and the rate of wheel load reduction were used as the index of train running safety that was directly affected the train derailment safety. In aspects of track, the train running safety depends on the complex interaction between wheel and rail, and the track-vehicle conditions (i.e., the curvature, cant, track system, vehicle speed and the operation conditions, etc). In this study, the relationship between the train running safety and the track curvature and vehicle speed for direct fixation concrete tracks currently employed in Korean light rapid transit was assessed by performing field tests using actual vehicles running along the service lines. The measured dynamic wheel load, lateral wheel load and lateral displacement of rail head were measured for same train running on four tested tracks under real conditions, which included curved and tangent tracks placed on the tunnel and bridge, thus increasing the train speed by approximately maximum design speed of each test site. Therefore, the measured dynamic track response was applied to the running safety analysis in order to evaluate the coefficient of derailment, the rate of wheel load reduction and the track gauge widening at each test site, and compare with the corresponding Korean train running safety standard. As the results, the lateral track response of direct fixation concrete track appeared to increase with the decreased track curvature; therefore, it was inferred that the track curvature directly affected the train running safety.

Evaluation of Running Stability of Tilting Trains in Conventional Curved Track (틸팅차량의 기존선 곡선부 주행안정성 평가)

  • 엄기영;엄주환;유영화;최정호
    • Journal of the Korean Society for Railway
    • /
    • v.7 no.4
    • /
    • pp.367-373
    • /
    • 2004
  • The investigation of running stability of the train for curved track is necessary in view of preventing the train from derailment caused by unbalanced forces transferred from the wheel and guaranteeing moderate level of running safety in curve sections. This paper carried out an analysis of running stability of tilting trains in conventional line which the test operation of tilting trains under development are scheduled. For this purpose, the wheel load and lateral pressure to the rail are evaluated. The criteria for the calculated wheel load and derailment coefficient are compared to the design criteria for running stability. It is founded that the running stability of tilting trains for curved track is guaranteed to have sufficient safety and the train speed in curve is governed by the geometric layout of track rather than the criteria for running stability.

The Effects on the Pulmonary Function of 20s Subjects according to Thoracic Mobility Exercise and Place Running Exercise (흉추가동운동과 제자리 달리기 운동이 20대 대학생의 폐기능에 미치는 영향)

  • Kim, Jong-woo;Hwang, Hyeng-jun;park, Yoon-gi
    • The Journal of Korean Academy of Orthopedic Manual Physical Therapy
    • /
    • v.22 no.2
    • /
    • pp.65-69
    • /
    • 2016
  • Background: The purpose of this study was to determine whether place running exercise that combines thoracic mobility exercise program increases pulmonary function of the 20s subjects. Method: Thirty subjects in their 20s were randomly assigned to on experimental group (n=15) or control group (n=15). Over the course of four weeks, the experimental group participated in place running exercise that combines thoracic mobility exercise program for 30 minutes three times per week and the control group participated in place running exercise and thoracoabdominal stretching exercise for 30 minutes three times per week. Subjects were assessed pre-test and post-test by measurement of pulmonary function Results: Our findings show that the experimental group had significant difference in expiratory reserve volume and vital capacity and maximal voluntary capacity (p<.05). In the comparison of the two groups, the experimental group had higher vital capacity and maximal voluntary capacity than the control group. Conclusion: In this study, the experimental group showed greater improvement in pulmonary function than the control group, which indicates that the place running exercise that combines thoracic mobility exercise program exercise is effective at increasing the pulmonary function.

  • PDF

A Study for Running Test Result of Train Automatic Driving Control by ATC/ATO/TWC System (차상 ATC/ATO/TWC 시스템의 열차 자동운전 구현의 현차시험 결과 고찰)

  • 강리택;이종성;김경식;박계서
    • Proceedings of the KSR Conference
    • /
    • 2000.11a
    • /
    • pp.578-585
    • /
    • 2000
  • ATC/ATO/TWC System is the used for the train operation instead of drivels. It is interfaced with train, train equipment, wayside facilities. In this paper described configuration signaling system, construction of signaling system software and structure of system safety. This paper describes the method of performing automatic driving by ATC/ATO/TWC. Also, reported test result for mainline static test and mainline running test.

  • PDF

Vibration characteristics test of two types bogie frame of a freight car on Kyeungbu line (경부선을 주행하는 두 종류의 화차 대차프레임의 진동특성시험 및 진동증가 원인파악에 관한 연구)

  • 홍재성;함영삼;백영남;오택열
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2004.10a
    • /
    • pp.1323-1326
    • /
    • 2004
  • A bogie frame of welded type have some problems. Some end beam has cracked. The cracks have profound influence on the safe freight service. The bogie consists of a frame, suspensions, brakes and wheel sets. Various analyses including a numerical simulation using a finite element method, a static load test, a fatigue test, and running test should be carried out to design the bogie. However cracks have been found at some end beams of the bogies mounted on the freight cars running with the high speed. The cracks of the end beam results in deterioration of the brake performance and the running safety. Numerical simulations and dynamic tests are carried out to figure out the causes of cracks in the existing bogie, and the vibrational characteristics of the improved bogie are compared with those of the conventional one. In this reports, the vibration characteristics were dealed with the most pressing matters for the solution of the end beam crack.

  • PDF

Changes in Knee Joint Loading on Infilled Turf with Different Soccer Cleat Designs (축구화 스터드 형태에 따른 무릎 모멘트의 변화)

  • Park, Sang-Kyoon;Lee, Joong-Sook;Park, Seung-Bum;Stefanyshyn, Darren
    • Korean Journal of Applied Biomechanics
    • /
    • v.19 no.2
    • /
    • pp.369-377
    • /
    • 2009
  • The purpose of this study was to determine the relationship between different soccer cleat designs and knee joint moments. Twelve physically active males (mean(SD): age: 26.4(6.2)yrs; height: 176.4(4.1)cm; mass: 74.0 (7.4)kg) were recruited Kinematic and force plate data were collected for all subjects during normal running and a $45^{\circ}$ cutting maneuver, called a v-cut. Both motions were performed at $4.0{\pm}0.2\;m/s$ on infilled artificial turf with three pairs of soccer cleats of different sole plate designs, and one pair of neutral running shoes. Inverse dynamics were used to calculate three dimensional knee joint moments, with repeated measures ANOVA and post hoc paired Student's t-test used to determine significance between shoe conditions. Significant differences were found in the extension moments of the knee for running trials, and for external rotation and adduction moments in the v-cutting trials. Knee moments were greater in v-cut than running, and the traditional soccer cleats (Copa Mondial and World Cup) tended to result in greater knee moments than the Nova runner or TRX soccer cleat. Cleat design was found to influence 3-dimensional knee moments in a v-cut maneuver. In the translational traction test, there were significant differences between all conditions. In the rotational traction test, friction with soccer shoes were greater than friction with running shoes. However, no differences were found between soccer shoes. Higher moments may lead to increased loads and stresses on knee joint structures, and thus, greater injury rates.

A Study of PSS Modelling of Ulchin Nuclear Plant Unit #1 by AVR Step Test (측정에 의한 울진 원자력 1호기 PSS 모델링 연구)

  • Kim, D.J.;Moon, Y.H.;Chun, D.H.;Kim, T.K.
    • Proceedings of the KIEE Conference
    • /
    • 2000.11a
    • /
    • pp.152-155
    • /
    • 2000
  • This paper deals with the PSS modelling of Ulchin N/P Unit #1 by utilizing the recorded data from AVR step test. In addition to it, the recorded results obtained from the AVR step test with PSS running and without PSS running are not only compared each other on the time domain but they are also analyzed with FFT on the frequency domain; the desirable effect of running PSS in Ulchin N/P Unit #1 is examined. Finally, the derived PSS model parameters lead to good matches between simulation results and recorded data.

  • PDF

Development of Free Running System for 2m-class Ship Models (2m급 모형선용 자유항주시스템 개발)

  • Shin, Hyun-Kyoung;Kim, Min-Sung
    • Journal of the Society of Naval Architects of Korea
    • /
    • v.45 no.3
    • /
    • pp.247-257
    • /
    • 2008
  • In this paper, a free running system, which is developed recently for a 2m-class ship models, will be introduced. For the remote control of hardware, GUI of software packages was developed using Visual Basic 6.0, and Host PC with Positioning Board manages Servo drive. Then the drive operates propeller and rudder. Its control performance will be shown. Also its adaptability to the resistance, manoeuverability and seakeeping model tests will be considered through the installation on a KTTC standard ship model from MOERI.