Abstract A new unified particle model that couples the Smoothed Particle Hydrodynamics (SPH) and a discontinuous approach known as the Volume Compensated Particle Method (VCPM) is developed to solve Fluid Structure Interaction (FSI) problems involving large deformation. Unlike the model that couples the Smoothed Particle Hydrodynamics and the Discrete Element Method (i.e. SPH-DEM) in which the applicable Poisson's ratio of the solid material should be less than certain critical values, the current unified particle model is able to model solid materials of large Poisson's ratio by using only axial interaction between solid particles. The coupling between SPH and VCPM is accomplished by treating the solid particles of VCPM at the solid-fluid interface as dummy particles in SPH. This paper presents the first SPH-VCPM coupled method for FSI with comprehensive validations. The VCPM solver is firstly verified for solving static and dynamic solid mechanics problems. Then, the proposed solver is used to solve several FSI problems involving free surface, i.e. water column on an Aluminum plate, flow under an elastic gate, dam break problems involving flexible structures and deformation of flexible structure in a rolling oil tank. The SPH-VCPM results match well with the published numerical results obtained from the literature.

中文翻译：

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用于流体结构相互作用 (FSI) 建模的耦合平滑粒子流体动力学-体积补偿粒子方法 (SPH-VCPM)

摘要 开发了一种新的统一粒子模型，该模型将平滑粒子流体动力学 (SPH) 和称为体积补偿粒子法 (VCPM) 的不连续方法相结合，以解决涉及大变形的流体结构相互作用 (FSI) 问题。与耦合平滑粒子流体动力学和离散元方法（即 SPH-DEM）的模型不同，其中固体材料的适用泊松比应小于某些临界值，当前的统一粒子模型能够模拟固体材料通过仅使用固体颗粒之间的轴向相互作用来获得大泊松比。SPH 和 VCPM 之间的耦合是通过将固-流界面处的 VCPM 固体颗粒作为 SPH 中的虚拟颗粒来实现的。本文介绍了第一个经过全面验证的用于 FSI 的 SPH-VCPM 耦合方法。VCPM求解器首次被验证用于解决静态和动态固体力学问题。然后，所提出的求解器被用来解决几个涉及自由表面的 FSI 问题，即铝板上的水柱、弹性闸门下的流动、涉及柔性结构的溃坝问题以及滚动油罐中柔性结构的变形。SPH-VCPM 结果与从文献中获得的已发表数值结果非常吻合。滚动油罐中涉及柔性结构和柔性结构变形的溃坝问题。SPH-VCPM 结果与从文献中获得的已发表数值结果非常吻合。滚动油罐中涉及柔性结构和柔性结构变形的溃坝问题。SPH-VCPM 结果与从文献中获得的已发表数值结果非常吻合。