钢—混凝土复合爆炸容器内爆响应数值模拟  

Numerical Simulations on Steel-concrete Blast Chamber under the Internal Explosive Load

作　　者：蔡清裕[1] 曾新吾[1] 胡永乐[2] 

机构地区：[1]国防科技大学理学院,湖南长沙410073 [2]浙江大学机械与能源工程学院,浙江杭州310027

出　　处：《国防科技大学学报》2003年第3期28-32,共5页Journal of National University of Defense Technology

摘　　要：应用动力有限元方法模拟了轴对称椭球顶圆柱密闭式抗爆容器内部爆炸流场,并对钢衬—混凝土复合容器壁的应力应变响应进行了数值模拟分析。分析结果显示:钢衬层应力波动的低、高频两部分分别起因于压力波的反复作用及钢衬结构的本征振动,二次波对容器顶部的作用很重要,并由此对混凝土的塑性及损伤的时空分布产生重要影响。数值模拟结果与实验结果一致。The dynamic finite element method was applied to simulate the explosive flow field of an axisymmetric cylindric blast chamber with an ellipsoid cap, the stress and strain responses of the steel-concrete part were analyzed. The numerical simulation results show that the major low and high frequency of stress wave of steel liner is generated by reduplicate reflection of the blast wave on steel liner and intrinsic vibration of liner structure, and that the twice reflection of the blast wave on cap part of the chamber is important, thereby the space-time distribution of plasticity and damage responses of concrete have been fundamentally affected. The numerical results are in good agreement with experimental results.

关 键 词：爆炸容器 数值模拟 爆炸载荷 

分 类 号：O381[理学—流体力学]