Numerical simulation of slamming impact load acting on a ship by a particle method

• Project/Area Number: 18K04576
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: The University of Tokyo
• Principal Investigator: Shibata Kazuya 東京大学, 大学院工学系研究科(工学部), 准教授 (30462873)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 粒子法 / 数値流体力学 / 水波 / 波浪 / 船舶海洋工学 / スラミング / 波力 / 流体解析 / 衝撃荷重 / 可変空間解像度 / 重合粒子 / シミュレーション

Outline of Final Research Achievements

We developed a numerical analysis method that can predict the wave pressure acting on a ship in a short computation time. The method is based on the overlapping particle technique for the multi-resolution simulation of particle methods and ellipsoidal particles. The spatial resolution can be changed in three levels in the simulation domain. The spatial resolutions of this simulation can be set more flexibly than conventional single- and two-level spatial resolutions.

Academic Significance and Societal Importance of the Research Achievements

本研究では、スラミング現象によって船体に加わる衝撃荷重を、汎用的に高速かつ高精度に計算するシミュレーション手法を開発した。手法として、流体の非線形現象を汎用的に解析することを得意とする粒子法を用いた。学術的独自性として、計算時間の短縮手法の導入が上げられる。研究代表者が開発した可変解像度の手法をスラミング計算に適用することで計算時間の短縮を行った。この成果は、従来の手法では解析が困難であった複雑な船首形状の影響の解析を可能にしたものであり、船舶の安全性の向上に貢献するものである。

Research Products

• [Journal Article] Boundary integral based polygon wall representation in the MPS method (2018)
  • Author(s): 松永 拓也，柴田 和也，越塚 誠一
  • Journal Title: Transactions of the JSME (in Japanese) Volume: 84 Issue: 864 Pages: 18-00197-18-00197
  • DOI: 10.1299/transjsme.18-00197
  • NAID: 130007439202
  • ISSN: 2187-9761
  • Peer Reviewed / Open Access
• [Presentation] 重合粒子を用いたMPS 法によるボールオンディスク流体潤滑解析 (2018)
  • Author(s): 山田 大輔, 松永拓也,越塚誠一,柴田和也，間庭 和聡, 根岸秀世
  • Organizer: 第32 回数値流体力学シンポジウム
• [Presentation] Boundary Integral Based Method for Treatment of Solid Wall in a Particle Method (2018)
  • Author(s): Takuya Matsunaga, Kazuya Shibata, Seiichi Koshizuka
  • Organizer: WCCM2018(The 13th World Congress in Computational Mechanics)
  • Int'l Joint Research
• [Presentation] Multi-resolution simulation by the Overlapping Particle Technique and the Ellipsoidal Particle Model for Particle Methods (2018)
  • Author(s): Kazuya Shibata, Seiichi Koshizuka, Takuya Matsunaga, Daisuke Yamada and Issei Masaie
  • Organizer: WCCM2018(The 13th World Congress in Computational Mechanics)
  • Int'l Joint Research
• [Presentation] Verification of Tsunami Simulation by Using Elliptical Particles of the MPS Method (2018)
  • Author(s): Daisuke Yamada,Seiichi Koshizuka, Kazuya Shibata
  • Organizer: The 28th International Ocean and Polar Engineering Conference
  • Int'l Joint Research