颗粒材料柱体崩塌物质点法数值模拟

为了研究颗粒材料崩塌的运动规律和堆积特性,采用物质点法对颗粒材料柱体崩塌试验进行数值模拟,并将模拟结果与试验结果进行对比验证。对颗粒材料柱体崩塌过程中颗粒的流动特性(滑动距离、堆积高度、速度、能量和动能通量的演化)进行了分析。进一步探究了颗粒材料柱体高宽比对颗粒流动能通量的影响,从而反应颗粒材料柱体崩塌过程中颗粒流的破坏能力。颗粒材料柱体高宽比越大,颗粒材料柱体外侧边缘颗粒速度越大,其溃散的程度更加强烈,并且滑动距离和动能均在增大。对于动能通量的分布,水平方向越靠近初始颗粒材料柱体,动能通量越大。

Numerical simulation of collapse of a granular material column using material point method

In order to study the movement and accumulation characteristics of granular material collapses,the material point method was used to simulate a granular material column collapse experiment.The simulation results were compared with the experimental results.Investigations were made on the flow properties of the particles (evolution of sliding distance,accumulation height,velocity,energy,and kinetic energy flux).In order to reflect the granular flow''s destructive potential during the collapse of the granular material column,the impact of the aspect ratio of the granular material column on the kinetic energy flux of the granular flow was further examined.The larger the aspect ratio of the granular material column,the larger the particle velocity at the outer edge of the granular material column and the stronger the degree of collapse.At the same time,the sliding distance and kinetic energy are increasing.For the distribution of kinetic energy flux,the closer the horizontal direction is to the initial granular material column,the greater the kinetic energy flux.