Fluid–structure interaction analysis by coupled FE–SPH model based on a novel searching algorithm
Fluid–structure interaction analysis by coupled FE–SPH model based on a novel searching algorithm
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DOI：
10.1016/j.cma.2014.04.001
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发表时间：
2014-07
影响因子：
7.2
通讯作者：
D. Hu;T. Long;Yihua Xiao;Xu Han;Yuantong T. Gu
中科院分区：
文献类型：
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作者：
D. Hu;T. Long;Yihua Xiao;Xu Han;Yuantong T. Gu
流固耦合问题在科学和工程中具有重要意义，这给计算力学带来了挑战。有限元-光滑粒子流体动力学耦合模型（FE-SPH）是一种鲁棒的模拟流固耦合问题的方法。然而，在耦合FE-SPH模型中，相邻搜索和接触搜索这两个重要步骤非常耗时。为了提高搜索效率，Swegle提出了点盒搜索算法（PIB）。但是，它有一个缺点，即搜索效率会显着影响点的分布（有限元节点和SPH粒子）。为了提高搜索效率，提出了一种新的条带PIB（Striped-PIB，S-PIB）搜索算法，克服了PIB算法受点分布影响的缺点，将邻域搜索和接触搜索两个耗时的步骤合并为一个搜索步骤。通过效率测试和流固耦合问题研究了新算法的精度和效率。结果表明，该模型能显著提高计算效率，是流固耦合分析的有力工具。
Fluid–Structure Interaction (FSI) problem is significant in science and engineering, which leads to challenges for computational mechanics. The coupled model of Finite Element and Smoothed Particle Hydrodynamics (FE–SPH) is a robust technique for simulation of FSI problems. However, two important steps of neighbor searching and contact searching in the coupled FE–SPH model are extremely time-consuming. Point-In-Box (PIB) searching algorithm has been developed by Swegle to improve the efficiency of searching. However, it has a shortcoming that efficiency of searching can be significantly affected by the distribution of points (nodes in FEM and particles in SPH). In this paper, in order to improve the efficiency of searching, a novel Striped-PIB (S-PIB) searching algorithm is proposed to overcome the shortcoming of PIB algorithm that caused by points distribution, and the two time-consuming steps of neighbor searching and contact searching are integrated into one searching step. The accuracy and efficiency of the newly developed searching algorithm is studied on by efficiency test and FSI problems. It has been found that the newly developed model can significantly improve the computational efficiency and it is believed to be a powerful tool for the FSI analysis.