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A coupled NMM-SPH method for fluid-structure interaction problems

机译:耦合NMM-SPH方法解决流固耦合问题

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摘要

The main challenges in the numerical simulation of fluid-structure interaction (FSI) problems include the solid fracture, the free surface fluid flow, and the interactions between the solid and the fluid. Aiming to improve the treatment of these issues, a new coupled scheme is developed in this paper. For the solid structure, the Numerical Manifold Method (NMM) is adopted, in which the solid is allowed to change from continuum to discontinuum. The Smoothed Particle Hydrodynamics (SPH) method, which is suitable for free interface flow problem, is used to model the motion of fluids. A contact algorithm is then developed to handle the interaction between NMM elements and SPH particles. Three numerical examples are tested to validate the coupled NMM-SPH method, including the hydrostatic pressure test, dam-break simulation and crack propagation of a gravity dam under hydraulic pressure. Numerical modeling results indicate that the coupled NMM-SPH method can not only simulate the interaction of the solid structure and the fluid as in conventional methods, but also can predict the failure of the solid structure. (C) 2019 Elsevier Inc. All rights reserved.
机译:流体-结构相互作用(FSI)问题的数值模拟中的主要挑战包括固体裂缝,自由表面流体流动以及固体与流体之间的相互作用。为了改善对这些问题的处理,本文开发了一种新的耦合方案。对于实体结构,采用数值流形方法(NMM),其中允许固体从连续体变为不连续体。适用于自由界面流动问题的“平滑粒子流体动力学”(SPH)方法用于对流体的运动进行建模。然后开发一种接触算法来处理NMM元素和SPH粒子之间的相互作用。测试了三个数值示例,以验证耦合的NMM-SPH方法,包括静水压力测试,水坝破坏模拟和液压作用下重力坝的裂缝扩展。数值模拟结果表明,NMM-SPH耦合方法不仅可以像常规方法那样模拟固体结构与流体的相互作用,而且可以预测固体结构的破坏。 (C)2019 Elsevier Inc.保留所有权利。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2019年第12期|466-478|共13页
  • 作者单位

    Tianjin Univ Sch Civil Engn State Key Lab Hydraul Engn Simulat & Safety Tianjin 300072 Peoples R China;

    CCCC Tianjin Port Engn Inst Co Ltd Tianjin 300222 Peoples R China|CCCC First Harbor Engn Co Co Ltd Tianjin 300461 Peoples R China|Key Lab Geotech Engn Tianjin Tianjin 300222 Peoples R China;

    Tianjin Univ Sch Civil Engn State Key Lab Hydraul Engn Simulat & Safety Tianjin 300072 Peoples R China|Chinese Acad Sci Inst Rock & Soil Mech State Key Lab Geomech & Geotech Engn Wuhan 430071 Hubei Peoples R China;

    Univ Toronto Dept Phys Toronto ON M5S 1A7 Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fluid-structure interaction; Numerical Manifold Method; Smoothed Particle Hydrodynamics; Coupled NMM-SPH method; Contact algorithm;

    机译:流固耦合数值流形方法;平滑的粒子流体动力学;NMM-SPH耦合方法;接触算法;

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