Bergen University College, Faculty of Engineering, PO Box 7030, 5020 Bergen, Norway.
J Hazard Mater. 2010 May 15;177(1-3):602-12. doi: 10.1016/j.jhazmat.2009.12.075. Epub 2009 Dec 23.
The subject of this research is the propagation of a cloud of solid particles formed from an explosion-damaged construction. The main objective is the interaction of the cloud (debris) with a solid beam located at some distance from the explosion. The mathematical model involves the flow of the gas using standard conservation equations, and this part of the model is solved numerically. The solid particles are treated as a system of solid points (so-called Lagrangian approach), whose motion is the result of the flowing gas as well as collisions with obstacles. These two issues are described respectively by Newton's second law and the hard-sphere model. The model is used to simulate various cases where the influence of different parameters like the value of the pressure of the explosion, the particle size, the number of particles and the obstacle location are investigated. The results are presented as snapshots of particle location, and also as the particle total momentum during collision with the beam.
本研究的主题是爆炸破坏建筑物形成的固体颗粒云的传播。主要目的是研究云（碎片）与位于爆炸一定距离处的固体梁之间的相互作用。数学模型涉及使用标准守恒方程的气体流动，该模型的这一部分通过数值方法求解。固体颗粒被视为固体点系统（所谓的拉格朗日方法），其运动是流动气体以及与障碍物碰撞的结果。这两个问题分别由牛顿第二定律和硬球模型来描述。该模型用于模拟不同参数的各种情况，如爆炸压力值、颗粒尺寸、颗粒数量和障碍物位置等参数的影响。结果以颗粒位置的快照以及与梁碰撞时颗粒总动量的形式呈现。
