| AUTODYN水下爆炸数值模拟研究 |
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| 引用本文： | 刘科种,徐更光,辛春亮,杨拯磊,秦建.AUTODYN水下爆炸数值模拟研究[J].爆破,2009,26(3):18-21. |
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| 作者姓名： | 刘科种 徐更光 辛春亮 杨拯磊 秦建 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室,北京,100081;中国运载火箭技术研究院,北京,100076;北京理工大学爆炸科学与技术国家重点实验室,北京,100081;海军装备研究院,北京,100073 |
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| 摘 要： | 采用AUTODYN数值计算软件,对TNT水下爆炸冲击波传播过程进行了数值模拟.计算结果表明,爆炸初期炸药中的爆轰波和水中冲击波是高频波,炸药及其附近水域需要足够细密的网格才能反映出这种特性,建议按照峰压衰减时间常数内至少采样100次的标准划分网格;同时应采用较小的人工粘性系数,减少对冲击波峰值超压的抹平,并对计算结果进行低通滤波,这样计算得到的冲击波压力曲线与经验公式计算曲线吻合得较好,不但可以准确捕捉冲击波峰值压力,而且能够比较准确地计算冲击波在水中传输时的衰减演化过程.
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| 关 键 词： | 爆炸力学 数值模拟 网格密度 人工粘性 |
Research on Numerical Simulation in Underwater Explosion by AUTODYN |
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| LIU Ke-zhong,XU Geng-guang,XIN Chun-liang,YANG Zheng-lei,QIN Jian.Research on Numerical Simulation in Underwater Explosion by AUTODYN[J].Blasting,2009,26(3):18-21. |
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| Authors: | LIU Ke-zhong XU Geng-guang XIN Chun-liang YANG Zheng-lei QIN Jian |
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| Affiliation: | LIU Ke-zhong1,XU Geng-guang1,XIN Chun-liang2,YANG Zheng-lei1,QIN Jian1,3(1.State Key Laboratory of Explosion Science , Technology,Beijing Institute of Technology,Beijing 100081,China,2.China Academy of Launch Vehicle Technology,Beijing 100076,3.Naval Academy of Armament,Beijing 100073,China) |
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| Abstract: | The propagation of underwater shock wave of TNT was simulated by AUTODYN.The results show that the detonation wave in early explosion and water shock were high-frequency wave,this phenomenon needed fine meshes in explosive and nearby water area.We advised meshing based on the sampling frequency larger than 100 during damping time of peak pressure,as well as small pseudo-viscosity coefficients,to reduce the toweling of peak pressure,and low-passing the calculation.The pressure curves of shock wave by simulat... |
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| Keywords: | explosion mechanics numerical simulation mesh density pseudo-viscosity |
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