外接触爆炸荷载作用下大口径钢管变形与破坏效应的数值模拟

纪冲;龙源;方向;唐献述

振动与冲击 ›› 2012, Vol. 31 ›› Issue (16) : 72-76.

PDF(2017 KB)
PDF(2017 KB)
振动与冲击 ›› 2012, Vol. 31 ›› Issue (16) : 72-76.
论文

外接触爆炸荷载作用下大口径钢管变形与破坏效应的数值模拟

  • 纪冲1,龙源1,方向1,唐献述2
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Numerical simulation of large-aperture steel pipe subjected to contact explosion loading

  • JI Chong1,LONG Yuan1,FANG Xiang1,Tang Xian-shu2
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摘要

摘 要:基于动力有限元程序LS-DYNA及Lagrangian-Eulerian耦合方法,对大口径钢管在凝聚态炸药外接触爆炸载荷作用下的非线性动态响应过程进行数值模拟,描述了管道的变形情况、破坏过程以及管道内部应力的发展过程,分析了炸药质量、管道壁厚等因素对钢管破坏效应的影响。并在相同的条件下进行了实验研究,计算结果与实验数据具有较好的一致性。研究表明,小质量炸药爆炸后在装药与钢管接触处产生凹坑、鼓包及层裂等破坏效应;而较大质量炸药爆炸后在其爆破部位发生剪切破坏产生类似弹丸的破片,破片具有较大的动能,能够击穿另一侧管壁。研究结果可应用于管道结构在接触爆炸作用下的毁伤或防护方面的预测,从而为管道的安全防护设计提供理论依据。

Abstract

Abstract: By means of an explicit nonlinear dynamic finite element computer code LS-DYNA,the nonlinear dynamic response process in a steel-pipe subjected to contact explosion loading were numerically simulated with Lagrangian-Eulerian coupling method. The deformation shape, damage process and evolution of Von-mises stress in pipe were described, and the effects of the explosive mass and pipe thickness to steel-pipe's damage extent were analyzed. Experiment research was also done in the same condition, and the numerical simulation results were in good agreement with experimental data. The study on this problem indicates the pit, bump and spallation would happen when the explosive mass is small. However, the fly fragment like EFP (Explosively Formed Projectile) would be shaped due to shear failure if the explosive mass is large , and could perforate the opposite side of the pipe because of the abundant kinetic energy carried by the fly fragments. The method can be applied to the engineering prediction of the damage or safety of the pipes under explosive and can provide theory reference for safety design.

关键词

爆炸力学 / 接触爆炸 / 钢管 / 破坏效应 / 数值模拟

Key words

mechanics of explosion / contact explosion / steel-pipe / damage effect / Numerical simulation

引用本文

导出引用
纪冲;龙源;方向;唐献述. 外接触爆炸荷载作用下大口径钢管变形与破坏效应的数值模拟[J]. 振动与冲击, 2012, 31(16): 72-76
JI Chong;LONG Yuan;FANG Xiang;Tang Xian-shu. Numerical simulation of large-aperture steel pipe subjected to contact explosion loading[J]. Journal of Vibration and Shock, 2012, 31(16): 72-76

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