粗粒料颗粒随机分布的数值模拟

 数值模拟试验不受时间、场地及试件尺寸等限制，是粗粒料室内力学试验和现场力学试验的有效补充。为了建立粗粒料数值模拟试验模型，研究了二维粗粒料颗粒的随机生成方法。首先按照粗粒料级配曲线随机生成松散分布的颗粒，然后应用DDA(discontinuous deformation analysis)模拟重力作用下颗粒在承模筒内的堆积分布，形成相互接触、结构稳定的颗粒聚合体，为粗粒料力学特性的数值模拟试验奠定基础

Numerical Simulation on Random Distribution of Coarse Granular Material Particles

Numerical simulation test is a powerful supplement of indoor and on-site tests of coarse granular material,which does not require much manpower and resources,and isn't limited by time and space,and it is the most important that the size of the sample is not limited and the boundary conditions could be controlled.In order to construct a numerical simulation test model,the authors study a two-dimensional random particle-generating algorithm of coarse granular materials.First,loosely distributed particles are randomly generated according to the gradation curve.Then,the packing and distribution pattern of these particles in a test tube under gravity is simulated adopting DDA(discontinuous deformation analysis).Lastly,they form stably-structured aggregates that contact each other.This result provides a sound basis for mechanics simulation test of coarse granular material.