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2019 Fiscal Year Annual Research Report

Development of coupled ground-city seismic response analysis method

Research Project

Project/Area Number 17K14719
Research InstitutionThe University of Tokyo

Principal Investigator

藤田 航平  東京大学, 地震研究所, 助教 (00744856)

Project Period (FY) 2017-04-01 – 2020-03-31
Keywords有限要素法 / 高性能計算 / 地震応答解析
Outline of Annual Research Achievements

高層ビル・インフラ・地下街などが複雑に入り組む都市においては,地震時に複雑な波動場が生じ,構造物を個々に評価した際には見られない地震応答が発生する可能性がある.このような特性の評価には,地盤-都市系の詳細な3次元連成解析を使うことが合理的である.そこで本研究では,デジタル都市データから地盤と地下・地上構造物群の高詳細3Dモデルを自動構築する手法,及び,地震応答解析の高性能計算手法を開発し,スーパーコンピュータを使った連成地震応答解析を行う.2019年度においては,many-core wide SIMDアーキテキチュア用の高速有限要素法を開発し,地盤と地下・地上構造物群の高詳細3D有限要素モデルを用いた地盤-都市の連成地震応答解析を実施した.有限要素法はランダムアクセスが多数含まれるため,通常はmany-core wide SIMDアーキテキチュアの計算機上で高い性能を出すことは難しい.そこで本研究では,ランダムアクセスを減らすアルゴリズム・実装を開発することでmany-core wide SIMDアーキテキチュアを採用するIntel Xeon Phi (Knights Landing)ベースのOakforest-PACSにおいて、従来手法比で3.99倍の高速化を実現した.また,東京駅周辺の地盤・地下街・地上構造物を含む一体モデルを超高分解能で構築し,地震時の応答を解析することで,地下街による地盤内部の波動場の変化による地表面応答の変化など,複雑な応答を得た.

  • Research Products

    (18 results)

All 2020 2019

All Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 9 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] The Effectiveness of Low-Precision Floating Arithmetic on Numerical Codes2020

    • Author(s)
      Sakamoto Ryuichi、Kondo Masaaki、Fujita Kohei、Ichimura Tsuyoshi、Nakajima Kengo
    • Journal Title

      HPCAsia2020: Proceedings of the International Conference on High Performance Computing in Asia-Pacific Region

      Volume: - Pages: 199-206

    • DOI

      10.1145/3368474.3368492

    • Peer Reviewed / Open Access
  • [Journal Article] FAILURE JUDGMENT OF RESERVOIR BODY BASED ON SEISMIC RESPONSE ANALYSIS AND FLOODED ANALYSIS ACCOMPANYING DESTRUCTION2019

    • Author(s)
      WADA Mitsumasa、KUBO Shiori、YOSHIDA Hidenori、FUJITA Kohei、ICHIMURA Tsuyoshi
    • Journal Title

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

      Volume: 75 Pages: I_155~I_164

    • DOI

      https://doi.org/10.2208/jscejam.75.2_I_155

    • Peer Reviewed
  • [Journal Article] Matched Filtering Accelerated by Tensor Cores on Volta GPUs With Improved Accuracy Using Half-Precision Variables2019

    • Author(s)
      Yamaguchi Takuma、Ichimura Tsuyoshi、Fujita Kohei、Kato Aitaro、Nakagawa Shigeki
    • Journal Title

      IEEE Signal Processing Letters

      Volume: 26 Pages: 1857~1861

    • DOI

      10.1109/LSP.2019.2951305

    • Peer Reviewed / Open Access
  • [Journal Article] GPU Implementation of a Sophisticated Implicit Low-Order Finite Element Solver with FP21-32-64 Computation Using OpenACC2019

    • Author(s)
      Takuma Yamaguchi, Kohei Fujita, Tsuyoshi Ichimura, Akira Naruse, Maddegedara Lalith, Muneo Hori
    • Journal Title

      Proceedings of Sixth Workshop on Accelerator Programming Using Directives (WACCPD)

      Volume: - Pages: -

    • Peer Reviewed / Open Access
  • [Journal Article] Development of Element-by-Element Kernel Algorithms in Unstructured Implicit Low-Order Finite-Element Earthquake Simulation for Many-Core Wide-SIMD CPUs2019

    • Author(s)
      Fujita Kohei、Horikoshi Masashi、Ichimura Tsuyoshi、Meadows Larry、Nakajima Kengo、Hori Muneo、Maddegedara Lalith
    • Journal Title

      Computational Science - ICCS 2019. ICCS 2019. Lecture Notes in Computer Science

      Volume: 11536 Pages: 267~280

    • DOI

      https://doi.org/10.1007/978-3-030-22734-0_20

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A Fast 3D Finite-Element Solver for Large-Scale Seismic Soil Liquefaction Analysis2019

    • Author(s)
      Kusakabe Ryota、Fujita Kohei、Ichimura Tsuyoshi、Hori Muneo、Wijerathne Lalith
    • Journal Title

      Computational Science - ICCS 2019. ICCS 2019. Lecture Notes in Computer Science

      Volume: 11537 Pages: 349~362

    • DOI

      https://doi.org/10.1007/978-3-030-22741-8_25

    • Peer Reviewed
  • [Journal Article] Heuristic Optimization with CPU-GPU Heterogeneous Wave Computing for Estimating Three-Dimensional Inner Structure2019

    • Author(s)
      Yamaguchi Takuma、Ichimura Tsuyoshi、Fujita Kohei、Hori Muneo、Wijerathne Lalith
    • Journal Title

      Computational Science - ICCS 2019. ICCS 2019. Lecture Notes in Computer Science

      Volume: 11537 Pages: 389~401

    • DOI

      https://doi.org/10.1007/978-3-030-22741-8_28

    • Peer Reviewed
  • [Journal Article] A finite element analysis method for simulating seismic soil liquefaction based on a large-scale 3D soil structure model2019

    • Author(s)
      Kusakabe Ryota、Ichimura Tsuyoshi、Fujita Kohei、Hori Muneo、Wijerathne Lalith
    • Journal Title

      Soil Dynamics and Earthquake Engineering

      Volume: 123 Pages: 64~74

    • DOI

      https://doi.org/10.1016/j.soildyn.2019.04.021

    • Peer Reviewed
  • [Journal Article] 416-PFLOPS Fast Scalable Implicit Solver on Low-Ordered Unstructured Finite Elements Accelerated by 1.10-ExaFLOPS Kernel with Reformulated AI-Like Algorithm: For Equation-Based Earthquake Modeling2019

    • Author(s)
      Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi, Akira Naruse, Jack C. Wells, Christopher J. Zimmer, Tjerk P. Straatsma, Takane Hori, Simone Puel, Thorsten W. Becker, Muneo Hori, Naonori Ueda
    • Journal Title

      Research Poster for SC19: The International Conference for High Performance Computing, Networking, Storage, and Analysis

      Volume: - Pages: -

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Development of high-performance low order unstructured implicit finite-element solvers for solid earth science problems2019

    • Author(s)
      Kohei Fujita, Tsuyoshi Ichimura, Takuma Yamaguchi
    • Organizer
      JpGU Meeting 2019
  • [Presentation] GPUによる三次元地盤増幅解析を用いた三次元地盤構造推定手法の開発2019

    • Author(s)
      山口拓真、市村強、藤田航平、堀宗朗、ラリス ウィジャラトネ
    • Organizer
      第24回計算工学講演会
  • [Presentation] 弾性不均質構造により引き起こされる巨大地震セグメント化の数値シミュレーション2019

    • Author(s)
      縣亮一郎、堀高峰、藤田航平、市村強
    • Organizer
      第24回計算工学講演会
  • [Presentation] 有限要素法による大規模3次元地盤液状化解析手法2019

    • Author(s)
      日下部亮太、藤田航平、市村強、堀宗朗、Lalith Wijerathne
    • Organizer
      第24回計算工学講演会
  • [Presentation] Development of Monitoring and Forecasting Methods for Crustal Activity Utilizing Large-Scale High-Fidelity Finite Element Simulations with 3D Heterogeneous Medium2019

    • Author(s)
      堀 高峰、市村 強、藤田 航平、山口 拓真、縣 亮一郎、飯沼 卓史
    • Organizer
      JpGU Meeting 2019
  • [Presentation] Prototype of Green’s function library for geodetic slip inversion based on an integrated velocity structure model of Japan2019

    • Author(s)
      縣 亮一郎、市村 強、藤田 航平、山口 拓真、飯沼 卓史、堀 高峰
    • Organizer
      JpGU Meeting 2019
  • [Presentation] 箱根火山の地形効果を考慮した火山性深部低周波地震に対する有限要素法による3次元地震波形計算2019

    • Author(s)
      山谷 里奈、望月 公廣、市村 強、藤田 航平、悪原 岳、堀 高峰、本多 亮、行竹 洋平
    • Organizer
      JpGU Meeting 2019
  • [Presentation] Low Ordered Unstructured Finite Element Earthquake Simulation with AI and Transprecision Computing2019

    • Author(s)
      Tsuyoshi Ichimura, Kohei Fujita, Takuma Yamaguchi
    • Organizer
      GPU Technology Conference
    • Int'l Joint Research
  • [Presentation] Application Enhanced by AI and Transprecision Computing: Finite Element Earthquake City Simulation2019

    • Author(s)
      Kohei Fujita, Takuma Yamaguchi
    • Organizer
      Accelerated Data Analytics and Computing Workshop 7
    • Int'l Joint Research

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Published: 2021-01-27  

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