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Elucidation of unsteady aerodynamic forces aimed at reduction of train accidents by tornadoes

Research Project

Project/Area Number 26350491
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Natural disaster / Disaster prevention science
Research InstitutionMeijo University

Principal Investigator

Suzuki Masahiro  名城大学, 理工学部, 教授 (00376881)

Co-Investigator(Renkei-kenkyūsha) Okura Nobuyuki  名城大学, 理工学部, 准教授 (70367738)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords鉄道 / 竜巻 / 空気力
Outline of Final Research Achievements

Aerodynamic forces acting on a train encountering a tornado were studied by an experiment, a theoretical model and a numerical simulation. The results showed as follows. 1) The aerodynamic forces change according to the position of the train in the tornado. 2) The aerodynamic forces acting on intermediate cars can be approximately estimated by using a theoretical model. 3) Assuming that the maximum wind speed is constant irrespective of the core radius, the yawing moment is maximized when the core radius is 0.8 times the train length. 4) When the running route deviates from the tornado center, the aerodynamic forces acting on the train suddenly decrease.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report

Research Products

(9 results)

All 2017 2016 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (7 results) (of which Int'l Joint Research: 6 results)

  • [Int'l Joint Research] Chalmers University of Technology(Sweden)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Study of aerodynamic forces acting on a train using a tornado simulator2016

    • Author(s)
      M. Suzuki and N. Okura
    • Journal Title

      Mechanical Engineering Letters

      Volume: 2 Issue: 0 Pages: 16-00505-16-00505

    • DOI

      10.1299/mel.16-00505

    • NAID

      130005280844

    • ISSN
      2189-5236
    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Large eddy simulation of a tornado flow around a train2017

    • Author(s)
      K. Obara, S. Krajnovic, G. Minelli, N. Okura and M. Suzuki
    • Organizer
      ERCOFATAC Workshop Direct and Large-Eddy Simulation 11
    • Place of Presentation
      ピサ(イタリア)
    • Year and Date
      2017-05-29
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of an experimental method to estimate aerodynamic forces acting on a train in a tornado2016

    • Author(s)
      M. Suzuki, K. Obara and N. Okura
    • Organizer
      11th World Congress on Railway Research
    • Place of Presentation
      ミラノ(イタリア)
    • Year and Date
      2016-05-29
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of an experimental method to estimate aerodynamic forces acting on a train in a tornado2016

    • Author(s)
      M. Suzuki, K. Obara, N. Okura
    • Organizer
      11th World Congress on Railway Research
    • Place of Presentation
      Milan, Italy
    • Year and Date
      2016-05-29
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Estimation of the aerodynamic forces acting on a train using a simple tornado model2016

    • Author(s)
      M. Suzuki, K. Obara and N. Okura
    • Organizer
      The Third International Conference on Railway Technology: Research, Development and Maintenance
    • Place of Presentation
      カリアリ(イタリア)
    • Year and Date
      2016-04-05
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Estimation of aerodynamic forces acting on a train by a simple tornado model2016

    • Author(s)
      M. Suzuki, K. Obara, N. Okura
    • Organizer
      The Third International Conference on Railway Technology: Research, Development and Maintenance
    • Place of Presentation
      Cagliari, Italy
    • Year and Date
      2016-04-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] An experimental investigation of flow around a vehicle passing through a tornado2015

    • Author(s)
      M. Suzuki, K. Obara, N. Okura
    • Organizer
      Experimental Fluid Mechanics 2015
    • Place of Presentation
      Prague, Czech
    • Year and Date
      2015-11-17
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study of aerodynamic forces acting on a train using a tornado simulator2014

    • Author(s)
      Y. Nakamura, T. Moroto, N. Okura and M. Suzuki
    • Organizer
      First international conference in numerical and experimental aerodynamics of road vehicles and trains
    • Place of Presentation
      Bordeaux, France
    • Year and Date
      2014-06-23 – 2014-06-25
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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