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Impact on granular bed: validation of discrete element modeling results by means of two-dimensional finite element analysis

机译：对颗粒床的影响：通过二维有限元分析验证离散元素建模结果

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摘要

The study of processes characterized by impulsive nature (i.e. impacts) can be considered of great interest in both physics and engineering disciplines: in the geotechnical field, for instance, their effect on the interaction between soil and structures need to be investigated. The present work aims at the validation, by means of two-dimensional finite element simulations, of a methodology of force calibration which uses results obtained from three-dimensional discrete element analysis for predicting the stress at the base of a granular bed, retained by a movable wall, arising when the system is hit by a projectile. To approach this problem, the low-velocity impact has been modeled as a punctual impulsive force on a granular packing.
机译：在物理和工程学科中，以脉冲性质（即冲击）为特征的过程的研究可以引起人们的极大兴趣：例如，在岩土工程领域，需要研究它们对土壤与结构之间相互作用的影响。本工作旨在通过二维有限元模拟验证力校准的方法，该方法使用从三维离散元素分析获得的结果来预测颗粒床底部的应力，并保留该应力。活动壁，当系统被弹丸击中时出现。为了解决这个问题，已经将低速冲击建模为对粒状填充物的点冲击力。

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