| 邢永明,佟铮,王呼和*.水下成组药包爆炸作用下冰盖动态响应数值模拟[J].实验力学,2010,25(3):299~304 |
| 水下成组药包爆炸作用下冰盖动态响应数值模拟 |
| Numerical Simulation of Ice Cover Dynamic Response Subjected to Group Charge Underwater Explosion |
| 投稿时间：2009-09-09 修订日期：2009-12-25 |
| DOI： |
| 中文关键词: 冰盖 成组药包 水下爆炸 数值模拟 |
| 英文关键词:ice cover group charge underwater explosion numerical simulation |
| 基金项目:国家自然科学基金（批准号：50869004）；内蒙古自治区社会发展领域资金项目2008 |
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| 中文摘要: |
| 利用大型有限元软件ANSYS/LS-DYNA建立了成组药包水下爆炸冰盖动态响应模型，通过数值计算，得到了冲击波峰值压力变化规律，峰值压力与理论计算结果基本吻合。本文分析了冰盖在成组药包水下爆炸冲击载荷下的应力分布及垂直位移响应特征。结果表明，冰盖迎爆面为压缩破坏，背爆面为拉伸破坏，两者数值均十分接近，其中迎爆面最大压力值可达18.12MPa,冰盖近爆炸点最大垂直位移为1.211cm,两药包连线中点最小位移为0.15cm,达到脆性冰盖形成贯通裂隙的基本条件，从而确定了冰盖在水下成组药包大间距布设条件下，其动 |
| 英文摘要: |
| Group charge underwater explosion model was established, numerical calculation was carried out, and the shock-wave peak pressure in ice medium was obtained based on the large-scale finite element software ANSYS/LS-DYNA. The peak pressure value is consistent with the theoretical calulation value. Response characteristics of ice cover stress distribution and perpendicular displacement were analyzed. Results show that the ice covered surface head on explosion is subjected to compression failure, and the rear surface is subjected to tensile failure. Both values are close to equal and the maximum pressure on the surface head on explosion has reached 18.12MPa. The maximum perpendicular displacement of ice cover nearest the blast point is 1.211cm, and the minimum displacement on the surface where is corresponding the projective point of the midpoint of two charges connecting line is 0.15cm, which reaches the basic condition of the ice cover brittleness. It is confirmed that the main dynamic damage characteristics of ice cover subjected to group charge underwater explosion are the crack generation. |
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