工程爆破

2015, v.21(05) 47-52

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起爆方式对截底椭圆形罩LSC射流成型影响的三维数值模拟
TRI-DIMENSIONAL NUMERICAL SIMULATION ON THE INFLUENCE OF JET FORMATION PROCESS OF THE LSC WITH CUTTING-BOTTOM OVAL COVER UNDER DIFFERENT INITIATION MODES

武双章;顾文彬;尼志青;徐景林;刘建青;
WU Shuang-zhang;GU Wen-bin;NI Zhi-qing;XU Jing-lin;LIU Jian-qing;Field Engineering Institute,PLA University of Science and Technology;The 213th Research Institute of China Ordnance Industry;

摘要(Abstract):

为了研究起爆方式对截底椭圆形罩LSC射流成型性能影响的特点和规律,运用ANSYS/LSDYNA对不同起爆方式下截底椭圆形罩LSC射流成型过程进行了三维数值模拟,获得了不同时刻射流横断面和正面的成型图片、射流最大速度时程曲线和射流最大速度及其出现的时刻。结果表明,对于顶部中线均布多起爆点,两端起爆时差在3μs以内时,形成的射流最大速度较大,约为4260~4290m/s,成型性能较好,当起爆点数量大于4时,可以认为是顶部中线线起爆;对于两侧棱上均布多起爆点,两端4点同时起爆时形成的射流最大速度较大,约4800m/s,当两侧棱上均布起爆点数量大于6时,可以认为是两侧棱上线起爆;就射流最大速度而言,两侧棱上均布多起爆点普遍大于顶部中线均布多起爆点。因此,起爆方式对LSC射流成型性能影响较大,研究结果在丰富LSC射流成型理论的同时,为实际应用LSC时选择合适的起爆方式提供了参考。
To obtain the characteristics and laws of the influence of jet formation performance of LSC with cutting-bottom oval cover under different initiation modes,the tri-dimensional numerical models of LSC were established with ANSYS/LS-DYNA program.The jet photographs of different time and the relationship of jet max-velocity vs.time and the jet max-velocity and corresponding time were obtained.The results showed that the jet max-velocity were about 4260~4290m/s to multiple initiation points on the top midline when the initiation interval was within 3μs,and the jet formation performance was better.It could be considered line initiation on the top midline when the initiation points exceeded 4.To multiple initiation points on the edges of both sides,the jet max-velocity were about 4800m/s by both ends of the 4points simultaneous initiation.It could be considered line initiation on the edges of both sides when the initiation points exceeded 6.The jet max-velocity of multiple initiation points on the edges of both sides was larger than that of multiple initiation points on the top midline.The initiation modes greatly affect the jet formation performance of LSC.The research results enriched the jet molding theory of LSC and provided reference to select the appropriate initiation mode forpractical application of LSC.

关键词(KeyWords): 起爆方式;截底椭圆形罩;LSC;射流成型;三维数值模拟
Initiation mode;Cutting-bottom oval cover;LSC;Jet formation;Tri-dimensional numerical simulation

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基金项目(Foundation): 总后勤部重点课题资助

作者(Author): 武双章;顾文彬;尼志青;徐景林;刘建青;
WU Shuang-zhang;GU Wen-bin;NI Zhi-qing;XU Jing-lin;LIU Jian-qing;Field Engineering Institute,PLA University of Science and Technology;The 213th Research Institute of China Ordnance Industry;

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