波浪欣沙的动力学机理分析

本文从床面附近泥沙颗粒的运动特征出发，详细分析波作用下床面泥沙扬起的动力学机制，得到了波浪欣沙计算公式，计算结果与实测资料相吻合、研究表明淤泥质第岸泥沙颗粒的稳定性主要受制于颗粒间的粘结力和薄膜水压力，重力作用居于次要地位，因此泥沙颗粒越细越难以起悬。

A New Version of Smoothed Point Method to Simulate Linear Elastic Wave Propagation

By using the kernel function of the smoothed particle hydrodynamics (SPH) and modification of statistical volumes of the boundary points and their kernel functions, a new version of smoothed point method is established for simulating elastic waves in solid. With the simplicity of SPH kept, the method is easy to handle stress boundary conditions, especially for the transmitting boundary condition. A result improving by de-convolution is also proposed to achieve high accuracy under a relatively large smooth length. A numerical example is given and compared favorably with the analytical solution.