【摘要】 采用动力学有限元程序,针对大变形带来的网格扭曲造成计算的锁死现象进行了ALE技术处理,结合高速摄影和X光照相实验结果,对金属圆管内爆轰波的相互作用效应进行数值模拟,给出了爆轰波对碰作用下金属圆管运动计算结果,复现了金属圆管对碰区鼓包现象,计算结果与实验吻合较好。可以预见,基于该方法能够初步分析影响金属圆管运动规律的诸多因素。更多还原

【Abstract】 Employing the two-dimensional ALE algorithm, the expansion of metallic tubes induced by inside head-on hitting two detonation waves has been numerically simulated with a modified finite-element hydrodynamic code. The simulated contours of deformed metallic tubes are in agreement with the results measured by flash X-ray cineradiography and high-speed photography. Especially, the swelling of expanded tubes at the place of two detonation waves hitting has been properly predicted. Some factors affecting tube movements can been analyzed with the simulation method.更多还原