摘要
随着恐怖袭击的不断演化,船舶、桥梁等以钢箱为主要支撑的战略性结构逐渐成为恐怖袭击和敌方军事打击的重要目标。本文中采用光滑粒子流体动力学(smoothed particle hydrodynamics, SPH)方法对钢箱内部爆炸过程进行了数值模拟,对比实验,分析了钢箱内部爆炸时钢箱表面的变形过程,得到了钢箱表面挠度值的变化趋势、不同时刻钢箱表面压强和von Mises应力的分布情况、钢箱表面中心点处速度和压强的变化趋势,验证了SPH方法在模拟钢箱内部爆炸问题上的有效性。通过进一步数值模拟,探讨了钢箱内部不同位置爆炸时钢箱的破坏形式和损伤程度,结果表明:炸药在钢箱内部角隅处爆炸时,钢箱的损伤程度最严重;炸药在钢箱内部正中心爆炸时,钢箱的损伤程度最轻。
With the strategic structure of the evolving terrorist attacks, ships and bridges which are supported by steel boxes gradually become important targets of terrorist attacks and enemy military strikes. We simulate the explosion process in a steel box by applying the smoothed particle hydrodynamics (SPH) method, analyze the deformation process of the steel box during the internal explosion, obtain the distributions of the pressure and the von Mises stress at different times, and achieve the trend of velocity and pressure at the center of the steel box plate. We find the feasibility and accuracy of the SPH method in simulating the internal steel box explosion through comparing with the experiment. We simulate the damage form and damage degree of the steel box structure subjected to internal blast at different positions. The results show that: when the explosive explodes at the corner and 60 mm from each box’s plate, there is the most serious damage;when the explosive explodes in the center, there is the least damage.
作者
强洪夫
孙新亚
王广
黄拳章
QIANG Hongfu;SUN Xinya;WANG Guang;HUANG Quanzhang(Engineering University of Rocket Army, Xi’an 710025, Shaanxi, China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2019年第5期22-30,共9页
Explosion and Shock Waves
基金
国家自然科学基金(51276192)
