论文部分内容阅读
光滑粒子动力学方法(Smoothed Particle Hydrodynamics,简称SPH)方法是一种Lagrange粒子方法,无需网格,抗畸变能力强,能处理大变形、多尺度问题。但是在梯度变化较大的区域精度低、稳定性差;在核近似过程中,由于边界外没有粒子分布,对边界附近的粒子进行求和时,由于粒子不充足会引起边界缺陷问题,而边界缺陷问题会导致在边界上或者在边界附近密度偏小,从而导致压力梯度失真。为了解决边界缺陷问题,需对边界附近的粒子进行修正。应用光滑粒子流体动力学方法(SPH)对二维和三维溃坝波与结构物相互作用过程进行模拟分析,通过对二维和三维溃坝波冲击结构物问题进行数值模拟和分析,合理再现了溃坝波与结构物相互作用的物理过程。
The Smoothed Particle Hydrodynamics (SPH) method is a Lagrange particle method that does not require grids and has strong anti-distortion ability and can deal with large deformation and multi-scale problems. However, the accuracy and stability of the region with large gradient changes are low and its stability is poor. In the process of nuclear approximation, there is no particle distribution outside the boundary, and when the particles near the boundary are summed, the boundary defect will be caused by insufficient particles, while the boundary defect The problem can lead to a lower density near the boundary or near the boundary, resulting in a pressure gradient distortion. In order to solve the problem of boundary defects, the particles near the boundary need to be corrected. The interaction between two-dimensional and three-dimensional dam-break waves and structures was simulated and analyzed by using the method of smooth particle hydrodynamics (SPH). By numerical simulation and analysis of the two-dimensional and three-dimensional dam structures, Physical process of dam breaking wave interaction with structure.