文档介绍：新疆大学硕士研究生毕业论文 Y 900879 摘要本文首先对SPH方法在国内外发展现状及其研究的意义进行了介绍,并对基本的SPH理论公式进行了推导研究,介绍了基本固体控制方程的SPH离散化过程。由于SPH方法的精度在很大程度上决定于核函数的选择,所以在这里简单介绍了最常用的B样条核函数,以及改进的核估计函数公式。此外, SPH方法是比较新的数值计算方法之一,而在国内还是刚刚开始应用研究,所以相关SPH方法的中文论文和资料还比较缺乏,所以在论文中添加了一个简单问题手动推导的例子,并针对这个例子的计算过程用反求工程方法拟定了 SPH方法的总程序主框架图,然后利用现有的SPH程序对实际问题中一些简单的例子进行了SPH高速冲击破坏数值模拟,详细分析了数值计算结果。主要进行了以下研究: ,边界处理问题进行了比较系统的研究,介绍了邻近粒子搜索的一种省时有效的算法。 ,并写出了SPH程序的主框架图。 ,实现了现有SPH程序能够对多物体任意方向上的碰撞问题进行SPH数值模拟。 ,得到一些比较典型的运算结果,通过对结果的分析验证了SPH方法对一些大变形动力学数值模拟问题的优越性。关键词:光滑粒子流体动力学(SPH)、数值模拟、高速碰撞、核函数新疆大学硕士研究生毕业论文 ABSTI认CT Inthis paper we first describe the development of SPH methed in our country and other countries and make sense our study and research. The formulation and discritization of the control equation with SPH method the accuracy ofSPH method,the selection of kenel function iS one ofthe important part,SO the B-spline function iSdescribed and method is a one of the new numerical method and application just begin inChina,SO there is not enough papers related with SPH method this purpose a simple example isconsidered and manually calculated,and the program frame iSdefined by using the reverse engineering ,the numerical analysis byusing the SPHprograme isconducted and detailly analyzed with applying to two real engineering problem. The main works in thiS paper are: on the specific problem ofSPH method isconducted,for example neighour partile research method and introduces a new efficient algorithm. one manually calculated example and then write theprograme frame. initial velosity in existing SPH programe is modified,and implementation of SPH programe with any directional velosity of multi—independet—matter colfide problem iS simulated. real engineering examples are calculated with SPIIprograme and reasonable resultS are resuits shown that the S