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首页> 美国卫生研究院文献>Materials >Micro–Macro Relationships in the Simulation of Wave Propagation Phenomenon Using the Discrete Element Method
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Micro–Macro Relationships in the Simulation of Wave Propagation Phenomenon Using the Discrete Element Method

机译：离散元法模拟波传播现象中的微观-宏观关系

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The present work is aimed to investigate the capability of the discrete element method (DEM) to model properly wave propagation in solid materials, with special focus on the determination of elastic properties through wave velocities. Reference micro–macro relationships for elastic constitutive parameters have been based on the kinematic hypothesis as well as obtained numerically by simulation of a quasistatic uniaxial compression test. The validity of these relationships in the dynamic analysis of the wave propagation has been checked. Propagation of the longitudinal and shear wave pulse in rectangular sample discretized with discs has been analysed. Wave propagation velocities obtained in the analysis have been used to determine elastic properties. Elastic properties obtained in the dynamic analysis have been compared with those determined by simulation of the quasistatic compression test.
机译：本工作旨在研究离散元方法（DEM）正确建模固体材料中波传播的能力，尤其着重于通过波速确定弹性。弹性本构参数的参考微观-宏观关系已经基于运动学假说，并且通过模拟准静态单轴压缩试验获得了数值。这些关系在波传播的动态分析中是否有效。分析了纵向和剪切波脉冲在圆盘离散的矩形样品中的传播。分析中获得的波传播速度已用于确定弹性性能。将通过动态分析获得的弹性特性与通过准静态压缩测试模拟确定的弹性特性进行了比较。

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