工程爆破

2018, v.24;No.105(05) 1-7

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钢板夹薄壁钢管组合板抗接触爆炸数值模拟
Numerical simulation of anti contact explosion of sandwich panel with steel sheet clamped thin-walled steel pipe

夏志成;蔡萌;孔新立;
XIA Zhi-cheng;CAI Meng;KONG Xin-li;College of Defense Engineering,PLA Army Engineering University;

摘要(Abstract):

为了提升钢板夹薄壁钢管组合板抗爆性能,有效减轻接触爆炸对防护结构的破坏,对钢板夹薄壁圆钢管组合板和钢板夹薄壁方钢管组合板,采用ANSYS/LS-DYNA软件进行接触爆炸数值模拟。取1kgTNT炸药,选择t=400μs时,分析该2种钢管组合板在接触爆炸作用下的抗爆吸能效果。结果表明:钢板夹薄壁方钢管组合板整体弯曲强于圆钢管组合板,但局部变形能力弱于圆钢管组合板;方钢管组合板变形输出的内能值小于圆钢管组合板,且不受钢管壁厚和数量变化影响,防护效果弱于圆钢管组合板;随着方钢管截面尺寸的减小,整体跨中挠度增加,破口直径增大,吸能减小,输出内能值增大,且不受壁厚和数量变化的影响,抗爆性能增强。同时,通过3组钢板夹薄壁钢管组合板参数对比分析后得知,在钢管数量为3,钢管壁厚2mm时,抗爆能力相对于其他工况下增大的较多,此结果可为工程实践提供参考。
In order to improve the anti-explosion performance of the sandwich panel steel plate sandwich thin-walled steel pipe,the damage of the protective structure caused by contact explosion is effectively reduced.The circular steel tube sandwich panels and square steel tube sandwich panels were researched by ANSYS/LS-DYNA.Take the explosive charge of1 kgTNT,select t=400μs,analyze the detonation and energy absorption effect of the two kinds of steel tube sandwich panel under contact explosion.Result shows:The total bending energy dissipation of square steel tube sandwich panels is stronger than that of circular steel tube sandwich panels.But the local deformation ability is weaker than that of circular steel tube sandwich panel.The internal energy output of the square steel tube sandwich panel is less than that of the circular steel tube sandwich panel.Which is not affected by the wall thickness and the number of the steel tube,the protective is weaker than the circular steel tube sandwich panel.With the reduction of square steel tube section size,the overall mid-span deflection increases,the broken diameter increases,the absorbed energy decreases,and the internal energy output increases,and not affected by changes in wall thickness and quantity,anti-explosion performance increased.At the same time,after comparative analysis of 3 sets composite plate parameters of steel plate clamped thin-walled steel pipe,it is known that when the number of steel pipes is 3 and the wall thickness of the steel pipe is 2 mm,the anti-explosion ability isincreased compared with other working conditions.This result can provide reference for engineering practice.

关键词(KeyWords): 接触爆炸;钢管;组合板;数值模拟;比较分析
contact explosion;steel pipe;sandwich panel;numerical simulation;comparative analysis

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基金项目(Foundation): 国家自然科学基金资助项目(51478469)

作者(Author): 夏志成;蔡萌;孔新立;
XIA Zhi-cheng;CAI Meng;KONG Xin-li;College of Defense Engineering,PLA Army Engineering University;

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