网格实体模型在拆除爆破结构倒塌模拟中应用

Applications of Solid Lattice Model(SLM) in Structural Collapse Simulation of Demolishing Blasting

开发了离散元框架内的网格实体模型(SLM),模拟拆除爆破中结构倒塌的复杂动力学过程。利用计算几何的基本理论对结构进行离散化,并在相邻单元间添加"梁",形成"梁"网络。用矩阵位移法计算"梁"端力,并根据Herrmann理论建立了单元间"梁"的强度准则。用C++语言开发了模拟软件,并在某大楼拆除爆破工程中进行了应用。模拟结果与实际结果接近。

The SLM is developed to simulate the complicate dynamic process for structural collapse of demolishing blast in frame of DEM （Discrete Element Method）. The structure is described using the method of calculation geometry. The beams are added between two neighboring elements, as result, a net of beams is generated. The end forces of beams are calculated using matrix-displacement method, and the strength rule is described by Hermann theory. The simulated soft is developed in the platform of VC ＋ ＋ . The software is used in the simulation of demolishing blasting of a building. The simulated results ap- pt4~ach to real ones.