工程爆破

2010, v.16;No.59(01) 1-5

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混凝土水下径向不耦合爆破特性研究
STUDY ON BLASTING CHARACTERISTICS OF UNDERWATER CONCRETE WITH RADIAL DECOUPLING CHARGE

李建阳;李永池;高光发;
LI Jian-yang,LI Yong-chi,GAO Guang-fa(Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China)

摘要(Abstract):

以三峡工程三期RCC围堰拆除的单耗实验为基础,利用非线性有限元软件LS-DYNA,分别模拟了边长为1.0m的混凝土立方体在50g装药量、0100m水深情况下,以及在25m水深、50100m水深情况下,以及在25m水深、50200g装药量下爆破损伤破坏的情况,装药结构为不耦合装药。数值模拟与实验数据比较接近。计算结果得出了水深对混凝土爆炸破坏的影响规律,并显示爆炸近区破坏随着水深的增加无显著变化,而远区破坏随水深增加明显下降。
Based on the experiment of unit consumption in 3rd RCC cofferdam removal of the Three Gorges Project,numerical simulations were carried out respectively via non-linear finite element LS-DYNA on blast damage of underwater concrete of radial decoupling charge,with 1 meter in side length under the following conditions: water-depth of 0 meter to 100 meters with charge of 50 grams as well as the case of water-depth of 25 meters with varying charge from 50 grams to 200 grams.Simulation results fit experimental data well and indicated certain rules that water-depth had an effect on blast damage and showed that there were no significant changes of explosion effects with the increasing water depth nearby the blast center,while it decreased dramatically in the far field regions.

关键词(KeyWords): 混凝土;水下爆破;不耦合装药;损伤破坏;数值模拟
Concrete;Underwater explosion;Decoupling charge;Damage;Numerical simulation

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(10632080);; 国家自然科学基金(50802092)

作者(Authors): 李建阳;李永池;高光发;
LI Jian-yang,LI Yong-chi,GAO Guang-fa(Department of Modern Mechanics,University of Science and Technology of China,Hefei 230027,China)

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