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Exploration of stochastic phenomena disobeying the central limit theorem and development of innovative stochastic processes in the structural engineering

Research Project

Project/Area Number 18K04334
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22020:Structure engineering and earthquake engineering-related
Research InstitutionKobe Gakuin University

Principal Investigator

SATO Tadanobu  神戸学院大学, 現代社会学部, 研究員 (00027294)

Co-Investigator(Kenkyū-buntansha) 木本 和志  岡山大学, 環境生命科学研究科, 准教授 (30323827)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords非ガウス確率過程 / フラクタル / 位相過程 / レヴィフライト確率密度 / 位相平均勾配過程 / 応答スペクトル準拠地震動 / 設計水平震度 / 降伏震度スペクトル / 地震動位相 / 位相差分過程 / 非ガウス過程 / ガウス過程 / 超音波 / 表面波 / 平均位相速度 / ベキ乗則 / 非整数ブラウン運動 / 非ガウス確率特性 / レヴィフライト分布 / 非整数レヴィフライト過程 / レヴィフライト分布関数 / 分数レヴィフライトノイズ過程 / 相関性 / 位相の微分不可能性 / 確率過程 / 自己アフィン相似過程 / 地震動位相過程
Outline of Final Research Achievements

The purposes of this research are to discover phenomenon that is expressed by the non-Gaussian stochastic feature and to develop a new stochastic process transcends the frame of the modern stochastic theory. The candidate to detect the non-Gaussian feature is the phase spectrum of acceleration time history. There are three topics in this theme. The first is to make clear the non-Gaussian stochastic characteristic of the mean gradient of phase (an approximation of the group delay time). The next is to develop an algorithm to simulate the phase process, which is called as “the Levy flight process”. We applied this phase process to simulate design response spectrum compatible acceleration time histories. Using the simulated acceleration time history we evaluate nonlinear response characteristics of the structural system. The third is to develop a non-Gaussian stochastic differential equation for simulating the time history of acceleration. We discuss a method to solve this equation.

Academic Significance and Societal Importance of the Research Achievements

本研究の主要目的は、構造工学の分野において、中心新極限定理に従わない確率事象を探索し発見すること、ならびにそれら事象を説明できる新しい確率過程を創出することである。前者はウイナー過程で説明できない工学・物理現象を発見することと同義であり、非ガウス確率則に従う物理現象を発見することであり、見つかれば、工学のみならず物理学的観点から強い関心を浴びるものである。まず、非ガウス系の物理現象として、地震動位相の差分過程に着目し、その確率特性が非ガウス性を示すことを明確にする。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (16 results)

All 2020 2019 2018 2017

All Journal Article (9 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 9 results,  Open Access: 6 results) Presentation (7 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] A STUDY ON THE PROPAGATION CHARACTERISTICS OF SURFACE WAVES IN GRANITE BASED ON ULTRASONIC MEASUREMENTS2020

    • Author(s)
      木本和志・岡野蒼・斎藤隆秦・佐藤忠信・松井裕哉
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))

      Volume: 76 Issue: 2 Pages: I_97-I_108

    • DOI

      10.2208/jscejam.76.2_I_97

    • NAID

      130007980155

    • ISSN
      2185-4661
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Non-Gaussian Characteristic of Acceleration Time History2020

    • Author(s)
      Tadanobu Sato, Ikumasa Yoshida and Yoshitaka Murono
    • Journal Title

      Proceedings of the 17WCEE

      Volume: I

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Simulation of Earthquake Motion Phase Considering Its Fractal and Auto-covariance Features2019

    • Author(s)
      A.A. Abdelrahman, T. Sato, C. Wan and L. Zhao
    • Journal Title

      KSCE Journal of Civil Engineering

      Volume: 23(11) Issue: 9 Pages: 1-11

    • DOI

      10.1007/s12205-019-0348-z

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Definition of Yield Seismic Coefficient Spectrum Considering the Uncertainty of the Earthquake Motion Phase2019

    • Author(s)
      A.A. Abdelrahman, T. Sato, C. Wan and Z. Wu
    • Journal Title

      Applied Sciences

      Volume: 9(11) Issue: 11 Pages: 2254-2272

    • DOI

      10.3390/app9112254

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] STOCHASTIC CHARACTERISTICS FEATURED IN THE MEAN GRADIENT OF EARTHQUAKE MOTION PHASE AND ITS MODELING2018

    • Author(s)
      佐藤忠信・室野剛隆
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE))

      Volume: 74 Issue: 2 Pages: 229-240

    • DOI

      10.2208/jscejseee.74.229

    • NAID

      130006743055

    • ISSN
      2185-4653
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 地震動位相の不確定性が構造物の非線形応答特性に及ぼす影響評価2018

    • Author(s)
      佐藤忠信・田中浩平・室野剛隆・西村隆義
    • Journal Title

      土木学会論文集A2(応用力学)

      Volume: 74(2)

    • NAID

      130007584814

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 地震動加速度時刻歴のフーリエ変換に内在する微分不可能性の本質を探る2018

    • Author(s)
      佐藤忠信
    • Journal Title

      土木学会論文集A1(構造・地震工学)

      Volume: 74(4)

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Parameter identification for structural health monitoring based on Monte Carlo method and likelihood estimate2018

    • Author(s)
      Songtao Xue、Bo Wen, Rui Huang, Liyuan Huang, Tadanobu Sato、Liyu Xie、Hesheng Tang and Chunfeng Wan
    • Journal Title

      International Journal of Distributed Sensor Networks

      Volume: 24(7) Pages: 1-9

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PHASE CHARACTERISTICS OF WAVE PROPAGATING IN A ROCK MEDIUM2017

    • Author(s)
      佐藤忠信・木本和志
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))

      Volume: 73 Issue: 2 Pages: I_73-I_84

    • DOI

      10.2208/jscejam.73.I_73

    • NAID

      130006329931

    • ISSN
      2185-4661
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 地震動位相差分の相関性に着目した位相の模擬2020

    • Author(s)
      佐藤忠信・室野剛隆
    • Organizer
      第40回地震工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 観測加速度時刻歴の非ガウス性と非定常性の抽出2019

    • Author(s)
      佐藤忠信・吉田行政
    • Organizer
      2019年応用力学シンポジュウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 地震動位相を模擬するための非整数レヴィフライト確率過程の構成2019

    • Author(s)
      佐藤忠信
    • Organizer
      第30回地震工学研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Structural damage identification based on parameter identification using Monte Carlo method and likelihood estimation2019

    • Author(s)
      T. Sato, L. Zhao and C. Wan
    • Organizer
      The Seventh International Conference on Structural Engineering, Mechanics and Computation
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Stochastic process of earthquake motion phase and its inherent features2018

    • Author(s)
      Tadanobu Sato
    • Organizer
      6th European conference on Earthquake Engineering, Thessaloniki, Greece,
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Non-Gaussian Stochastic Features Hidden in Earthquake Motion Phase2018

    • Author(s)
      Tadanobu Sato
    • Organizer
      Sixth International Symposium on Life-Cycle Civil Engineering
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of inhomogeneous structures in seismic propagation path in Japan based on the fractal characteristic of observed earthquake motion phase2018

    • Author(s)
      Kouhei Tanaka and Tadanobu Sato
    • Organizer
      16th World Conference on Earthquake Engineering, Santiago Chile
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2022-01-27  

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