弹体侵彻混凝土靶三维细观数值模拟  

Numerical simulation of concrete 3D meso-mechanical mode subjected to projectile penetration

作　　者：梁斌[1] 王琪华[1] 卢永刚[1] 

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《混凝土》2014年第6期16-19,共4页Concrete

基　　金：国家自然科学基金项目(11002134)

摘　　要：分析模拟混凝土细观结构对侵彻破坏影响,采用随机骨料模型,在前人研究的基础上,提出了一种新的混凝土三维凸型骨料的投放与生成方法—分区投放与射线延拓法,减小了骨料投放与生成所需的判别区域,改善了骨料随机投放过程中的效率问题。采用背景网格划分法,使得三维数值建模与计算效率更高。在此基础上采用动力有限元程序开展了弹体侵彻混凝土细观数值模拟,相对于均质材料,由于骨料的存在引起的混凝土材料性能的不均匀性,从而对弹体侵彻性能影响的初步认识,研究结果为混凝土细观数值建模与弹体设计评估提供参考。The algorithm of three-dimensional numerical model for micro-scale concrete was studied.A three-dimensional random ag-gregate generated and thrower program is compiled by a new kind of algorithm according to analysis of related algorithms based on the for-mer investigation.Which can reduce avoid the confine in calculation.The efficient of the algorithm is improved by using the subarea fill method.The efficient of grid generate was improved by using the background grid projection method.The concrete 3-D meso numerical mode of projectile penetration was established by nonlinear dynamical analyses software.The results of numerical simulation for penetra-tion concrete indicated that material heterogeneous was main reason for influence penetration performance different from isotropy material.

关 键 词：混凝土 随机骨料 数值模拟 侵彻 

分 类 号：TU528.01[建筑科学—建筑技术科学]