2013, Volume 15, Issue 10
Strategic Study of CAE >> 2013, Volume 15, Issue 10
Studies on several dynamics problems in the design of the explosion water-well with steel-inner
Field Engineering Institute, PLA University of Science and Technology, Nanjing 210007, China
Next Previous
Abstract
Taking 3 kg 2, 4, 6-trinitrotoluene (TNT) explosive exploding in the explosion water-well with steel-linner with internal diameter and depth both of 11 m as the research object, based on numerical simulation, several concerned dynamics problems in the design of explosion well, such as the influence of thickness of the steel-inner and concrete cofferdam thickness to the force and deformation of the steel, setting the bubble curtain in the well to improve the facilities security and so on, are studied. The results show that the underwater explosion shock wave parameters in the well are consistent with the result of the calculation by P. Cole formula. The biggest force and deformation of the inner wall of the steel-inner appears below the horizontal line of the center of the charge, when the thickness of steel-inner reaches 50 mm. The equivalent plastic strain where is 1.6 m far away from the bottom of steel-inner can attain 0.16 %, but this does not meet the conditions of the strength theory. When the thickness of steel lining is 20 mm, plussing 0.5 m thick concrete cofferdam,the explosion well with steel-inner meets the requirements of safety design. Setting a bubble curtain, the radius of which is 4.9 m and the thickness is 0.05 m, can make the peak pressure of the shock wave near the steel wall be decreased by 40.6 %. When the thickness of the steel-inner is 20 mm and the thickness of concrete cofferdam is over 0.35 m, it will be able to meet the requirements of the security design by taking the bubble curtain method to attenuate the shock wave. The conclusions above can offer the method and the basis for the structural design of the explosion well with steel-inner and safety assessment.
Keywords
design of explosion water-well with steel-inner ; dynamics analysis ; stress and strain response ; numerical simulation ; bubble curtain ; concrete cofferdam
Figures
图1
图2
图3
图4
图5
图6
图7
图8
图9
图10
图11
图12
References
[ 1 ] 时党勇，李裕春，张国民. 基于ANSYS/LS-DYNA8.1进行显示 动力分析[M]. 北京：清华大学出版社，2002.
[ 2 ] LSTC. LS-DYNA keyword user’s manual[R]. California：Livermore Software Technology Corporation，2003.
[ 3 ] 肖绍清，王文杰，曹桂祥，等. 炮孔复合装药结构对混凝土作用 的数值模拟研究[J]. 工程爆破，2003，9（3）：19-21. link1
[ 4 ] 张秀华，张春巍，段忠东. 爆炸荷载作用下钢框架柱冲击响应与 破坏模式的数值模拟研究[J]. 沈阳建筑大学学报，2009，25（4）： 656-661. link1
[ 5 ] 张祖贤，邢安定，汪 熹，等. 兵器黑色金属材料手册[M]. 北京： 兵器工业出版社，1990.
[ 6 ] P. 库尔（美）. 水下爆炸[M]. 北京：国防工业出版社，1960.
[ 7 ] 樊自建，沈兆武，马宏昊. 水中空气隔层对冲击波传播衰减作用 的初步探讨[J]. 工程爆破，2007，13（2）：7-10. link1
[ 8 ] 张志波，李春军，李红勇，等. 气泡帷幕在水下爆破减震工程中 的应用[J]. 爆破，2003，20（2）：75-76. link1
[ 9 ] 周 睿，冯顺山. 气泡帷幕对水中冲击波峰值压力衰减特性的 研究[J]. 工程爆破，2001，7（2）：13-17. link1
[10] 徐秉业，刘信声. 应用弹塑性力学[M]. 北京：清华大学出版 社，1995.
京公网安备 11010502051620号
