In this paper, a meshless method (SPH) is used to simulate the movement of snow drift with complex particle size. The characteristic point of SPH method is that the problem domain is transformed into particles containing physical information, and the particles carrying physical information are solved to get accurate results. Therefore, SPH can accurately describe the physical information of any snow particle in the microscopic study of snow drift, which is also a unique advantage of SPH in the study of snow drift. In this paper, the SPH modeling method of complex particle size snow particles are described, and the snow drift model is optimized, which makes the initial SPH snow drift model conform to the random accumulation of snow particles in nature. In this paper, the snow drift structure of complex particle size is numerically simulated, and the macro and micro results obtained by simulation are analyzed. The conclusions obtained are compared with the conclusions of other scholars, and the feasibility of SPH method to simulate the movement of snow drift with complex particle size is verified.

本文采用无网格方法（SPH）来模拟复杂颗粒尺寸的雪堆运动。SPH方法的特点是将问题域转化为包含物理信息的粒子，对携带物理信息的粒子进行求解，得到准确的结果。因此，SPH在雪漂微观研究中可以准确地描述任意雪粒子的物理信息，这也是SPH在雪漂研究中的独特优势。本文阐述了复杂粒径雪粒的SPH建模方法，并对雪漂模型进行了优化，使得初始的SPH雪漂模型符合自然界雪粒的随机堆积。本文对复杂粒径的雪堆结构进行了数值模拟，并对模拟得到的宏观和微观结果进行了分析。所得结论与其他学者的结论进行了比较，验证了SPH方法模拟复杂粒径雪堆运动的可行性。