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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society for Railway
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Korean Society for Railway
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Volume & Issues
Volume 9, Issue 6 - Dec 2006
Volume 9, Issue 5 - Oct 2006
Volume 9, Issue 4 - Aug 2006
Volume 9, Issue 3 - Jun 2006
Volume 9, Issue 2 - Apr 2006
Volume 9, Issue 1 - Feb 2006
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Numerical Study on Fire Suppression using a Water-mist System Considering Droplet Breakup
Ko, Seung-Woo ; Ko, Kwon-Hyun ; Ryou, Hong-Sun ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 625~629
This paper describes the effect of the droplet breakup process on fire suppression using a water-mist system, which is considered as a alternative to sprinkler fire suppression system. In the evolution of the water-mist, the droplet breakup process is an important phenomenon because it may significantly affect the droplet evaporation rate. The Fire Dynamics Simulator (FDS, Ver. 4.0) code, which is widely used for the simulation of fire dynamics, is used for the present simulation, and it is modified to consider the droplet breakup phenomena. The Prediction by the modified code shows good agreement with experimental data for the temperature. The original FDS predicts higher temperature about
than experimental data. From the results, it is concluded that the droplet breakup phenomena must be considered for more precise simulation of fire suppression process.
Performance Evaluation of a Lubrication Seal for Freight Cars
Kim, Jae-Hoon ; Shin, Kong-Soon ; Kim, Jun-Ho ; Goo, Byeong-Choon ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 630~634
Rail car axles are very important parts for safety of passengers and structural integrity of vehicles. The axles are supported by bearings. To seal grease lubricating the bearings of freight cars, an oil seal has been developed. The developed oil seal is composed of an inner plate, an outer plate and a seal rubber. The friction between axle and housing with the developed oil seal is very low. The seals are designed for a minimum life expectancy of 800,000 kilometers service. In this study, an accelerated durability tests according to AAR Specification M-934-82 were carried out. In addition, various performance tests according to KS B 2804 were conducted.
A Method to Estimate the Weight-reduction of Hybrid Bodyshells by Material Substitution
Cho, Hyun-Jik ; Koo, Jeong-Seo ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 635~643
In this paper, a theorectical approach is studied to predict structural performances and weight-reduction rates of hybrid bodyshells in case that the materials of roof structures are substituted. To determine other light-weight materials to be substituted for the original roof materials, bending and twisting deformations are considered under constant stiffness and strength conditions, which derive some new weight-reduction indices from a structural performance point of view. The indices derived to estimate the weight-reduction can be utilized as a good criterion at the conceptual design for material substitution of the roofs.
Settlement of Embankment and Foundation for Concrete Track of Gyungbu High Speed Railroad
Yang, Shin-Chu ; Moon, Jae-Suk ; Lee, Hyun-Jung ; Kang, Dae-Woong ; Kim, Dae-Sang ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 644~651
An application of concrete track is being actively processed for the construction of Korean railroad. The concrete track has an advantage to decrease the maintenance ire, but is very difficult system to maintain after earthwork settlement occurred. Therefore, the management and control of embankment and foundation settlement is very important for the successful concrete track construction. We expect that the main part of the settlement of the concrete track is the one of embankment and foundation supporting it. Settlements vulnerable to the concrete track among the causes of lots of settlements are primary consolidation and secondary compression settlement of foundation, creep settlement of embankment, settlement caused by train load, and unequal settlement resulting from the difference of embankment material and construction process. This paper investigated the settlement causes to make badly effects on the concrete track and also evaluated the settlement with field tests and numerical analysis.
Analysis Of AT Feeding Systems Considering The Voltage Constraint Conditions Of The Pantagraph
Moon, Young-Hyun ; Kim, Baik ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 652~656
Constant load model is widely used for an electric train to perform the static analysis of AT (Auto Transformer) feeding systems. In this model, the train will be considered as a constant load model when it drives or as a constant source model when it applies regenerative brake. However there must be some constraints imposed on the pantagraph voltage in actual operations. These constraints are established for the reason of protecting the feeding facilities from excessive rise of regenerative braking voltage or guaranteeing the minimum traction power of train. In normal operating situation, the pantagraph voltage of the train should be maintained within these limits. Keeping these facts in minds, we suggest new methods or analyzing AT feeding systems using the constant power models with the conditions of voltage constraints. The simulation results from a sample system using the proposed method illustrate both the states of system variables and the supply-demand relation of power among the trains and the systems very clearly, so it is believed that the proposed method yields more accurate results than conventional methods do. The proposed methods are believed to contribute to the assessment of TCR-TSC for compensating reactive powers too.
Pre-estimate on Structural Behavior and Cracks of Subway Wall Structures Using Gage Measurement
Kim, Young-Jin ; Kim, Sang-Chel ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 657~663
By measuring concrete temperature and strains of concrete and reinforcing bars throughout gages embedded and also by observing the crack occurrence, this study aims at the characteristics of structural behavior of subway wall structure in associate with concrete ages. The length of 23.5m, thickness of 2.0m of real subway custody line was selected as a representative structure and 7 thermocouples and 6 strain gages were installed to measure the behavior of wall structure. The results were compared and verified with analytical results using MIDAS in order to show their usefulness. It was found that only attachment of strain gages on the surface of reinforcing bars can figure out the timing of crack occurrence and hydration heat program is useful to estimate comparatively exact magnitudes of temperature. Since estimated time of crack occurrence throughout thermal stress analysis depends on the period of transferred thermal stress from concrete to reinforcing bars, however, cracks from naked eyes were identified later than analytical results. Cracks were observed first at the center of wall line and then to the end of line symmetrically.
Interaction Effects on Global Supply Chain Management and Information Technology of MNCs in East-Asia Countries
Kim, Seog-Soo ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 664~670
This Research aims to analyze the effects of SCM management capabilities and IT capabilities on firm performance. The strategic performance was shown to be positively and significantly affected by flexibility and responsiveness which were proxies for SCM management capabilities. However, neither main effect of IT capability nor interaction effects of IT capability and SCM management capability on firm performance was found.
A Study on Overall Measurement System Development of Tilting Train Express
Han, Young-Jae ; Kim, Sang-Soo ; Kim, Young-Guk ; Koo, Hun-Mo ; Kim, Seog-Won ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 671~676
A measurement system was developed in this study. It conducts on-line testing and evaluation of tilting train express(TTX). The measurement system is installed in each train for the performance measurement during the test run. It is composed of software part, hardware part and can measure various signals such as vehicle velocity, catenary voltage, motor temperature. The software controls the hardware of the measurement system, performs the analysis and calculation of measurement data and acts as interface between users and the system hardware. The hardware is consisted of 7 DAMs(Data Acquisition Modules) and 6 monitoring modules.
A Study on the Measurement of Disc-Pad Friction Coefficient for HSR-350x
Kim, Young-Guk ; Park, Chan-Kyeong ; Park, Tae-Won ; Kim, Seog-Won ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 677~681
In general, the braking system of high speed train has an important role for the safety of the train. To stop the train safely at its pre-decided position, it is necessary to combine the various brakes properly. The Korean high speed train (HSR-350x) has adopted a combined electrical and mechanical (friction) braking system. In this study, the measuring method that can obtain the disc braking forces and friction coefficient between disc and pad during on-line test of HSR-350x has been suggested and verified through the comparison of the results obtained from this method and those of the results of the dynamo-tests.
Study on the Deduction of Traction/Braking Forces for the Train from Acceleration/Deceleration
Kim, Seog-Won ; Kim, Ki-Hwan ; Mok, Jin-Yong ; Kim, Young-Guk ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 682~688
In this paper, a method which can deduce the traction farce or the braking force from the acceleration or the deceleration of the train, has been suggested. In the case of Korean high speed train (HSR-350x), the traction force and the braking forces have been obtained by using this method. It is proven that the proposed method is a very good tool in estimating the traction force or the braking force when the train starts or stops. Also, these forces on be used to calculate friction coefficients of mechanical brakes and the transmission efficiency of the traction system.
A Study of Interaction between Viaduct and Turnout
Yang, Shin-Choo ; Han, Sang-Chul ; Kim, In-Jae ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 689~694
Most of design parameters of Railway Structures are determined by the serviceability requirements, rather than the structural safety requirements. The serviceability requirements come from Ensuring of running safety and ride comfort of train, reduction of track maintenance working Track-Bridge interaction should be considered in the design of railway structures. In this study, a numerical method which precisely evaluate an axial force of rail and a rail expansion and contraction when turnout exist in succession on a CWR of bridge is developed.
A Study on the Low Temperature Mechanical Characteristics of SM490A for the Railroad Vehicle Structure
Kang, K.W. ; Goo, B.C. ; You, W.H. ; Kim, J.H. ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 695~700
This study investigates the effects of the material properties and the fatigue behavior in the SM490A material specimens due to the low-temperature atmosphere. In the fatigue behavior, the low-temperature affects the fatigue life. As the temperature get low, the fatigue limit increase, also As the yield strength and the tensile strength increase, the impact absorbed energy decrease. The difference of fatigue lift represents to normal distribution and it is larger between the room temperature and the low temperature, but in the result of the cumulative density function, the effect of temperature is not too large on it.
Dilation and Erosion Technique using a Inspection of the Catenary System Design
Kim, Woo-Sang ; Jung, Min-Yong ; Kim, Ji-Yoon ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 701~704
The catenaries must guarantee the constant electricity to the trains, so that the safety and the estimate of fatigue degree and the inspection of abrasion degree should be done rapidly. This thesis proposes the system that can manage the performance/failure of the catenaries using the image process as the solution for the weak points of the existing inspection such as the decrease of immediateness and the lack of constancy in the human resources. This study simulates the ALD using VHSV (Virture HSV) which is the unreal HSV images, not getting the real HSV in ages to the image processing technique that repeats the erosion and the expansion of the images as the methods that can monitor the slight/critical defects of the catenaries as dealing with the result of the catenaries inspection images. The final ALD (Abnormal Line Detection) system is designed based on this simulation. I have demonstrated it with the VHSV (Virture HSV) virtual images as the materials of the test and inspected it through testing the defects of the catenaries for the thesis.
Evaluation of Railway Trends by Railway Characteristic Factors
Lee, Hee-Yup ; Kim, Chang-Hyun ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 705~710
The railway has been developed largely by the characteristic factors of the railway through change of the society and culture. The railway trends has been changing from instinctive methods to settle the mass transport of the early days, to sensitive methods to pursue the railway culture centering around human being. As dividing by period according to the changes of railway trends into the external nation, there are to analyze the development history of the railway design. Accordingly each nation (United Kingdom, Germany, France, Japan) and the style's change, to confirm the changes into the design applied in society and culture needs, and to analyze by a year in changes of the environment and the railway history from the 1800's to 2005, so there contribute in the development of railway design to present the paradigm of the future railway by analyzing the trend according to the changes of railway design and the life environment in this paper.
On Design Factors to be Considered During Light Railway-transit System Development
Kim, Ji-Hoon ; Kim, Jeung-Tae ; Kim, Hong-Chan ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 711~716
A set of design factors that should be considered during rail transit system development in proposed. As the current trend in the rail transit development emphasizes its role as a medium through which the interaction between the city environment and people takes place, the factors of harmony, color, characteristics, identity, and communication should be considered in the railway-transit system design. It's important to ensure that there exist harmony between the design and the civic environment, the influence of color on people is properly considered, the car design possesses distinct characteristics, and that the sense of common identity as well as effective communication is fostered between the system and people it serves. Several cases from various countries are presented to illustrate the points raised in the paper.
A Behavior Analysis of Railway Steel Plate Girder Bridge in the Applying Resilient Panel Track System
Choi, Jung-Youl ; Eom, Mac ; Kang, Duk-Man ; Park, Yong-Gul ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 717~724
The major objective of this study is to investigate the effects and application of improvement for railway steel plate girder bridge by resilient panel track system. It analyzed the mechanical behaviors of steel plate girder bridge with applying resilient panel track system on the finite element analysis and laboratory test for static & dynamic characteristics. As a result, the improvement of steel plate girder bridge with resilient panel track systems are obviously effective for the static & dynamic response which is non-ballast steel plate girder bridge. The analytical and experimental study are carried out to investigate resilient panel track system decrease vertical acceleration and deflection on steel plate girder bridge for serviceability. And the resilient panel track system reduced dynamic maximum displacements (about 59%) and stresses (about 82%), the increase of dynamic safety is predicted by adopting resilient panel track system. From the dynamic test results of steel plate girder bridge, it is investigated that vertical acceleration and deflection is very low with applying resilient panel track system. The servicing steel plate girder bridge with resilient panel track system has need of the reasonable improvement measures which could be reducing the effect of static and dynamic behavior that degradation phenomenon of structure by an unusual response characteristic and a drop durability.
A Study on Design and Reliability Assessment for Embedded Hot-Standby Sparing FT System Using Self-Checking Logic
Lee, Jae-Ho ; Lee, Kang-Mi ; Kim, Young-Kyu ; Shin, Duc-Ko ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 725~731
Hot Standby sparing system detecting faults by using software, and being tolerant any faults by using Hardware Redundancy is difficult to perform quantitative reliability prediction and to detect real time faults. Therefore, this paper designs Hot Standby sparing system using hardware basis self checking logic in order to overcome this problem. It also performs failure mode analysis of Hot Standby sparing system with designed self checking logic by using FMEA (Failure Mode Effect Analysis), and identifies reliability assessment of the controller designed by quantifying the numbers of failure development by using FTA (Fault Tree Analysis)
A Study on the Reliability Demonstration for Korea High Speed Train Control System
Lee, Jae-Ho ; Lee, Kang-Mi ; Kim, Young-Kyu ; Shin, Duc-Ko ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 732~738
This research provides a scheme for Highly Accelerated Stress Test that is necessary to demonstrate reliability prediction of Korean Rapid Transit Railway Train Control System sub-equipment, which is calculated by a relevant standard for failure rate prediction of electronic products. Although determining failure information generated in the process of trial running by statistic analysis is widely accepted as a measure of confirmation for reliability prediction, this research suggests the modeling for System Life Test determined by accelerating stress factors as a measure of confirmation for reliability prediction of sub-equipment unit that is generated ahead of a trial running in System Life Cycle. Consequently, the research demonstrates sub-equipment unit reliability test, which is based on the model derived from Accelerated Stress Test, according to accuracy level and the number of samples, and conducts an official experiment by making out a reliability test procedure sheet based on test time as well.
A Study on the Analysis of the Reliability and the Safety to apply RCM to Railway System
Kim, Soo-Myung ; Lee, Duk-Gyu ; Lee, Kyoung-Hak ; Lee, Key-Seo ; Shin, Seok-Kyun ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 739~745
The role of maintenance in railway is going to be extended to improve the reliability of railway system in the aspect of Asset management gradually. In this paper, the meaning of reliability and safety in RCM which has been applied in order to improve the efficiency of maintenance is deduced. And the analysis task of reliability and safely which has been recommended in railway standards such as EN50126 and IEC62278 is reviewed in the aspect of RCM. Finally, the several ways are proposed to apply RCM to railway system through the comparison between the RCM procedure and the analysis procedure for the reliability and safety in railway standards. Hereafter, if the analysis of reliability and safety is performed with the concept of RCM in the beginning of railway business, it will be more efficient to improve the reliability and manage the railway asset.
Dynamic Behavior Evaluation for Split PC sleeper using the Field Test
Um, Hwan-Ju ; Lee, Chang-Hun ; Eum, Ki-Young ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 746~752
The major objective of this study is to investigate the dynamic behavior evaluation of split PC sleepers for railway turnout by the field test. In railway engineering, a turnout is necessary to allow a vehicle to move from one track to another. So, turnout is required very complex railway technologies such as lolling stock, track. In reference to conventional line speed-up and improvement railway, accurate assembly of turnout affects travel ins qualify of turnout area and running safety. Because of heavy weight and a large volume of the long sleeper used to turnout and car limit, transport and the prerequisite for trouble-free transport of the factory pre-assembled major turnout components is achieved through division of long sleepers. The one of the advantages for using a split sleeper is to reduce the dynamic vibration according to the information of developed nations. Therefore, we investigate the characteristic of dynamic behaviors of split sleepers which are adopted for the first time to improve performance of turnout From the field test results of the split sleeper, it is evaluated that the modification of weight, material and stiffness compared with wood sleeper is very effective for the ballast safety. However, the decrease in vibration of split sleeper was not found out.
Numerical Modelling of Reinforced Soil Slopes Under Railway Load
Jung, Young-Hoon ; Lee, Il-Wha ; Jang, Ki-Soo ; Yoo, Seung-Joon ; Lee, Su-Hyung ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 753~760
This paper presents the procedure and results of the numerical modelling that was carried out to investigate the stability of reinforced soil slopes under dynamic railway load. The two-dimensional explicit dynamic finite element method (ABACUS) was used to carry out the numerical analyses. To simulate the railway load, the top surface of the embankment was excited by the uniform distributed load whose frequency and magnitude was estimated by the measured railway acceleration during train passing. The embankment displacements and geogrid axial forces were analyzed to evaluate the stability of reinforced soil slopes under the dynamic train load.
The High Power Active Filter System for Harmonic Compensation of 25kv Electric Railway
Kim, Jae-Chul ; Rho, Sung-Chan ; Lee, Yoo-Kyung ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 761~765
At present, harmonic currents cause serious problems in power conversion system using the semiconductor switching device. Also some of the conversion system provokes harmonic currents against to the main power supply system and causes hindrances for the system. Main power impedance of the traditional LC passive filter method, influences on the filter characteristics and amplifies the harmonics when resonance phenomenon is occurred. And the traditional existing 2 level inverter systems show the limit in capacity of voltage and current in case of occurring sudden load change. So, to solve this problem active filter which uses cascaded H-bridge multi level inverter has been designed and ex-filter system circuits were totally investigated. With multi level active filtering system not only the size of filter but also the size of filter for transformer can be reduced by half and so as to the weight, while the capacity of inverter can be double sized and wave forms can be compensated exactly and precisely. Also by the benefit of the increase in rating capacity, the various currents owing to the load fluctuation can be dealt more steadily. In order to simulate the wave form of harmonics based on the measured data on the AC 25kV high speed Domestic Commercial railway, it was simulated with PSCAD/EMTDC and PSIM. Based on the results of this demonstration, the power supply system and inverter system would be more stable and also promoting its efficiency.
A Study on Proper Station Spacing in Urban Railway
Kim, Gang-Seog ; Sung, Ki-Han ; Lim, Young-Su ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 766~771
Railway stations are important facilities for transport of passengers and freights. The location of station have an effect on the efficiency of railway transport and operation. In this study, an inspection of the primary factors for station spacing in urban railway has been performed and a review for the propriety of the present states and further improvement has been carried. It may be helpful for proper decisions on the route planning in urban railway. Primary factors for station spacing are 1)train capacity, 2)competitiveness with other transportation, 3)accessibility and 4)construction cost, which is out of consideration in the inspection. From the result of this study, the proper station spacing is about 600m for the accessibility, more over 1.03km for the train capacity and more over 1.4km for the competitiveness with other transportation.
Three-Dimensional Flow Analysis around Rolling Stock with Square Cross Section Using Low Re
Jang, Yong-Jun ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 772~777
Three-dimensional numerical study is performed for the flow analysis around the rolling stock with square cross section (Mugungwha train model). The height (H) of rolling stock is considered as the characteristic length and the total length of rolling stock is 40 which correspond to 1/2 unit of rolling stock. The gap between the surface and rolling stock is 0.17H which is average value. The relative velocity between the surface and rolling stock is assumed to be zero and Re=10,000 based on the characteristic length. Low Re
 is employed for the calculation of turbulence which resolve all the way to the solid surface (laminar sub-layer). Large flow separation occurred at the front head of train and a pair of vortex is generated on both top and side of rolling stock. The behavior of vortices on the top of the rolling stock is believed to affect the performance of the pantograph which should be intensively investigated. The difference between the high pressure in the front stagnation region of train and the low pressure in the rear separated region causes a large pressure drag. A large pair or vortex are generated in the rear of train and the size of vortex is increased more than the size of cross section of train.
Practical Nonlinear FE Analysis of Concrete Beam Considering Material Nonlinearity
Chung, Won-Seok ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 778~783
This study investigates the ultimate behavior of reinforced concrete beams by means of practical nonlinear finite element (FE) analyses. Uniaxial constitutive models for the concrete and steel material are selected in this study. The adopted material model is integrated into the ABAQUS fiber beam elements through a user-defined material subroutine (UMAT). Within a developed nonlinear finite element framework, the FE results have been compared to experimental results reported by other researchers. It has been found that the proposed finite element model is capable of predicting the initial cracking load level, the yield load, the ultimate load, and the crack distribution with acceptable accuracy.
Evaluation of Impact Factor on Ballast Track in Subway using Field Test
Kang, Kee-Dong ; Park, Yong-Gul ; Choi, Jung-Youl ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 784~791
This paper presents the test results to evaluate the healthiness of the ballast in subway. The test includes the dynamic load test in servicing Line the screen classification test of aggregates and the wear test. From the results, the aspect and the property of the ballast are evaluated. The dynamic load tests explain the relationship between the deterioration of the ballast and the fluctuation of loads. The assessment of impact factor based on the field test results in a good property of test blocks is proposed.
Modeling of the Maglev Vehicle Running over the Elevated Guideway Using Flexible Multibody Dynamics
Lee, Jong-Min ; Kim, Young-Joong ; Kim, Kuk-Jin ; Kim, Dong-Sung ; Kim, Sook-Hee ; Han, Hyung-Suk ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 792~797
In general, the Maglev vehicle is ran over the elevated guideway consisted of steel or concrete structure. Since the running behaviour of the vehicle is affected by the flexibility of the guideway, the consideration of the flexibility of guideway is needed for evaluation of dynamics of both the vehicle and guideway. A new technique based on flexible multibody dynamics is proposed to model the Maglev vehicle, levitation controller, and guideway into a coupled model. To verify the technique, an urban Maglev vehicle is analyzed using the technique and discussions are carried out.
An Experimental Study on the Displacement of Suspension Element for High Speed Rolling-stock
Kim, Hyung-Jin ; You, Won-Hee ; Park, Tae-Won ; Hur, Hyun-Moo ;
Journal of the Korean Society for Railway, volume 9, issue 6, 2006, Pages 798~803
The suspension elements like primary coil spring, yaw damper, body to body damper are core parts of high speed railway bogie and the faults relating to these elements are reported recently. Thus, this study is started to analyze the displacements characteristics of suspension elements of high speed railway rolling-stock for the purpose of preventing the faults and developing the maintenance technology for suspension elements like spring and dampers. For this purpose, we made a plan to measure the displacements of the primary coil spring, yaw damper and body to body damper in actual running condition. We developed the measurement device to measure the longitudinal displacement and angular displacement of suspension elements and installed this device to test suspension elements. Test to measure displacements of suspension elements is conducted in service line of high speed railway. The displacement data which is acquired from the test with actual vehicles was analyzed for its maximum displacement depending on the track sections. As a result of analysis, we obtained the displacement trends occurring with the sections and valuable results like maximum values and the displacement distribution.