| 无网格数值方法在结构物水动力研究中的应用 |
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| 引用本文： | 李绍武,尹振军.无网格数值方法在结构物水动力研究中的应用[J].水科学进展,2004,15(6):739-744. |
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| 作者姓名： | 李绍武 尹振军 |
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| 作者单位： | 天津大学建筑工程学院港口工程系, 天津, 300072 |
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| 基金项目： | 国家自然科学基金资助项目(50479047)~~ |
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| 摘 要： | 运用一种移动粒子半隐式法建立无网格水流数值模型,探讨该模型在结构物水动力特性研究中的可能性。在无网格条件下,粒子间的相互作用通过核子函数来表示,并通过建立物理量光滑模型、梯度模型和二阶导数模型来离散控制方程。流体的不可压缩性是通过引入粒子数密度概念实现的。该方法不受流体变形程度和固边界形状的限制,因而具有特定的适应性。运用该模型模拟了水柱倒塌后有无透空块体两种情况下右端直墙上的压力过程。计算结果表明透空块体可使直墙压力减小42%。
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| 关 键 词： | 无网格数值模型 移动粒子半隐式法 核子函数 透空块体 结构物 水动力学 |
| 文章编号： | 1001-6791(2004)06-0739-06 |
| 收稿时间： | 2003-07-18 |
| 修稿时间： | 2003年7月18日 |
Application of non-grid numerical model to hydrodynamics of structures |
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| LI Shao-wu,YIN Zhen-jun.Application of non-grid numerical model to hydrodynamics of structures[J].Advances in Water Science,2004,15(6):739-744. |
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| Authors: | LI Shao-wu YIN Zhen-jun |
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| Affiliation: | School of Civil Engineering, Tianjin University, Tianjin 300072, China |
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| Abstract: | A non-grid hydrodynamic numerical model is established by using the moving particle semi-implicit (MPS) method to investigating the possibility of the model in the research of the hydrodynamics of the coastal structures under the action of water movement. Without grids, the interaction effect among neighboring particles can be simulated by means of the kernel function, based on which the governing equation is discretized by establishing the smoothing model, the gradient model and the second-derivative model (i.e. the Laplacian model). The incompressibility of the fluid is determined by introduction of a so-called particle density number. The model is free from limitation through complex shape of rigid boundary and arbitrary deformation of the free surface, and thus has the adaptability to special practical situation. In the end, collapsing process of a water column impinging an upright wall after by-passing a set of perforated blocks is simulated by using the MPS model.The numerical results show that the peak value of the pressure in the case of the perforated blocks decrease by 42% compared with the case without perforated blocks. |
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| Keywords: | non-grid numerical model moving particle semi-implicit method kernel function perforated blocks structure hydrodynamic |
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