Search Results 1-20 of 610

  • <b>Measures for Fatigue Damage Reduction in Electrical OCL Connections</b>

    YAMASHITA Chikara , OHARA Takuya , KOBAYASHI Shigeyuki

    … As a result of OCL-pantograph simulation, the authors clarified the conditions under which fatigue damage of the electrical connection can occur. …

    Quarterly Report of RTRI 60(1), 22-27, 2019

    J-STAGE 

  • <b>Maintenance Cycle for Overhead Catenary Systems for Battery-powered Electric Trains</b>

    HAYASAKA Takamasa , USUKI Tadanori

    … In the case of battery-powered electric trains, pantograph contact strips do not slide along the contact wire in non-electrified sections, allowing an oxide-like film to form on the contact wire depending on the number of days of exposure. …

    Quarterly Report of RTRI 60(1), 28-32, 2019

    J-STAGE 

  • Cost Reduction of C/C Composite Pantograph Contact Strips and Evaluation of its Wear Limit  [in Japanese]

    久保田 喜雄 , 長谷川 浩司 , 亀崎 昭雄

    鉄道総研報告 = RTRI report : 鉄道総合技術論文誌 32(10), 29-34, 2018-10

  • Hybrid Simulation of Pantograph-Catenary Systems based on Multi Degree-of-Freedom Catenary Model  [in Japanese]

    小林 樹幸 , 山下 義隆 , 臼田 隆之 , STOTEN David P.

    鉄道総研報告 = RTRI report : 鉄道総合技術論文誌 32(6), 11-16, 2018-06

  • Development of Models of the Contact Lines and Pantograph for Railway Lines of Various Alignments  [in Japanese]

    小山 達弥 , 長尾 恭平 , 池田 充

    鉄道総研報告 = RTRI report : 鉄道総合技術論文誌 32(6), 5-10, 2018-06

  • Development of Response Control Systems used Pantograph Damper for Various Types of Stacks  [in Japanese]

    荻原 実 , 真栄城 玄一 , 廣谷 直也 , 真下 貢 , 小西 昇 , 三浦 景祐

    火力原子力発電 = The thermal and nuclear power 69(5), 267-275, 2018-05

  • Stability Analysis of Travelling Pantograph  [in Japanese]

    KOBAYASHI Shigeyuki , USUDA Takayuki , YAMASHITA Yoshitaka

    … The friction force acts to the travelling pantograph head in horizontal direction due to sliding of the pantograph head and contact wire. … This study proposes a 2-dimensiodal pantograph model that considers friction characteristics of the pantograph head based on the multi-body dynamics approach. … Furthermore, a stability analysis method based on the complex eigenvalue analysis for the pantograph model is proposed. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1108, 2018

    J-STAGE 

  • The contact performance of prototype of multi-segment pantograph head  [in Japanese]

    USUDA Takayuki , MITSUMOJI Takeshi , NAGAO Kyohei , KUBOTA Yoshiki , WAKABAYASHI Yusuke

    … In developing a pantograph of a high speed train, reducing aerodynamic noise of the pantograph is one of the most important subjects. … For reducing this noise, suitable configuration of pantograph head, which has a smooth cross section profile, is investigated. … However, the pantograph head with smooth cross section profile and conventional support system of contact strip sometimes wreak undesirable lift force characteristic. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1310, 2018

    J-STAGE 

  • Basic Study on Application of Carbon Based Pantograph Contact Strip to Shinkansen Vehicle  [in Japanese]

    KUBOTA Yoshitaka

    … Carbon-based materials are globally used for the pantograph contact strips of high-speed trains. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1311, 2018

    J-STAGE 

  • Influence of the lateral movement speed of the contact wire on the wear of the pantograph contact strip  [in Japanese]

    MORIMOTO Fumiko , KUBOTA Yoshitaka

    … The wear rate of the pantograph contact strip is influenced by the contact force, the electrical current and the arc discharge energy between an overhead contact wire and the contact strip. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1312, 2018

    J-STAGE 

  • Parameter Identification of the Three-Dimensional Pantograph Simulation Model based on Vibration Test of the Actual Pantograph  [in Japanese]

    NAGAO Kyohei , KOYAMA Tatsuya , IKEDA Mitsuru

    … Railway Technical Research Institute has been upgrading the pantograph/catenary simulator. … As a part of the simulator improvement, a three-dimensional simulation model of pantograph was constructed. … In this paper, the method of vibration test of actual pantograph to identify parameters of the pantograph model is introduced. … First, the pantograph model is divided into two parts - panhead and the other. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1309, 2018

    J-STAGE 

  • Lift force of pantograph for conventional railways in crosswind ambient  [in Japanese]

    KOBAYASHI Shigeyuki , MITSUMOJI Takeshi , USUDA Takayuki , YAMASHITA Yoshitaka , TSUNEMOTO Mizuki , KIYONO Tomoaki , ADACHI Kazunori

    … In order to supply electricity to the electric railway vehicles, the lift force characteristics of the pantograph should be tuned properly. … The purpose of this study is to investigate the lift force characteristics of a conventional line pantograph that is exposed to crosswind based on a wind tunnel facility. … Velocity of the crosswind, angle of attack of the crosswind and travelling direction of the pantograph were defined as parameters of the wind tunnel testing. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1307, 2018

    J-STAGE 

  • Contact Analysis Method based on Three Dimensional FEM Catenary Model and Lamped-mass Pantograph Model  [in Japanese]

    KOYAMA Tatsuya , IKEDA Mitsuru , NAGAO Kyohei

    … For development of overhead contact lines system (OCS) and a pantograph, it is important to grasp dynamic interaction between the OCS and the pantograph. … Therefore, pantograph/catenary simulator, in which lamped-mass pantograph models can run along a three-dimensional catenary FEM model, was developed. … This paper shows the analysis method of contact between the pantograph and catenary, and a calculation example by using this method. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1308, 2018

    J-STAGE 

  • Characteristics of Shinkansen noise around tunnel portal with different type of tracks  [in Japanese]

    INOUE Tatsuya , OGATA Yukie , MURATA Kaoru , KITAGAWA Toshiki

    … When the Shinkansen train runs, noise sources around the Shinkansen train are mainly categorized as noise generated from the lower part of cars, pantograph noise, aerodynamic noise generated from the upper body of the cars (upper part aerodynamic noise), and bridge noise. …

    The Proceedings of the Transportation and Logistics Conference 2018.27(0), 1302, 2018

    J-STAGE 

  • Extension of suboptimal control for flow around pantograph head  [in Japanese]

    MURATA Takaaki , FUJITA Yosuke , FUKAGATA Koji , MITSUMOJI Takeshi

    … <p>In order to suppess the vortex shedding from a pantograph head of bullet trains, which is known as one of the main sources of aerodynamic noise, we extend the suboptimal control technique so that it can deal with a body of arbitrary shape by numerically computing the impulse response of the adjoint equation. … Subsequently, we apply this technique to a flow around a pantograph head to obtain the suboptimal blowing/suction profile to reduce the pressure drag. …

    The Proceedings of the Fluids engineering conference 2018(0), OS1-10, 2018

    J-STAGE 

  • Upgrading method of contact performance for test model of pantograph head with smooth profile  [in Japanese]

    USUDA Takayuki , MITSUMOJI Takeshi , NAGAO Kyouhei , KUBOTA Yoshitaka

    … <p>In developing a pantograph of a high speed train, reducing aerodynamic noise of the pantograph is one of the most important subjects. … For reducing this noise, suitable configuration of pantograph head, which has a smooth cross section profile, is investigated. … However, the pantograph head with smooth cross section profile and conventional support system of contact strip sometimes wreak undesirable lift force characteristic. …

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), G1800104, 2018

    J-STAGE 

  • Development of a catenary model for pantograph/catenary hybrid simulation  [in Japanese]

    KOBAYASHI Shigeyuki , YAMASHITA Yoshitaka , USUDA Takayuki , STOTEN David P.

    … <p>Hybrid simulation of current collection system provides more flexible than the existing testing equipment for evaluation of pantographs with considering dynamic interaction between pantograph and overhead catenary system. … HS consists of a physical pantograph, an actuator to excite the pantograph head and a real-time simulator for the catenary model. …

    The Proceedings of the Dynamics & Design Conference 2018(0), 329, 2018

    J-STAGE 

  • Aerodynamic noise reduction by applying porous material to pantograph head support  [in Japanese]

    MITSUMOJI Takeshi , NAGAO Kyohei , USUDA Takayuki , WAKABAYASHI Yusuke

    … Reduction in aerodynamic noise emitted from a pantograph is an important subject for environmental preservation and speed-up of Shinkansen trains. … In this study, aerodynamic noise reduction by applying porous material to pantograph head support was investigated. … As a result, it is clarified that the porous material can reduce aerodynamic noise emitted by pantograph head support. …

    The Proceedings of the Symposium on Environmental Engineering 2018.28(0), 125, 2018

    J-STAGE 

  • Design of XYθ stage driven by piezoelectric actuators with reverse pantograph structures by FEM analysis  [in Japanese]

    TOKUI Ryota , HAGIWARA Wataru , FUCHIWAKI Ohmi

    … We magnify displacements of the piezoelectric actuators 30 times with the reverse pantograph structures organized by flexure hinges. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2018(0), 2P1-F18, 2018

    J-STAGE 

  • A method for lift coefficient estimation of a pantograph using sparse modelling  [in Japanese]

    YAMASHITA Yoshitaka , MITSUMOJI Takeshi , USUDA Takayuki

    … <p>It is necessary for pantographs of Japanese high-speed trains to satisfy both low noise characteristics and insensitive lift force characteristics toward the variation in wind direction and in the shape of pantograph head due to wear. … Taking particular note of the profile of the pantograph head, streamline-wise profile generally leads to low noise but sensitive lift force characteristics, and rectangular profile leads to less sensitive lift force characteristics but generates larger noise. …

    Transactions of the JSME (in Japanese) 84(868), 18-00267-18-00267, 2018

    J-STAGE 

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