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| 钢质圆柱壳在侧向爆炸荷载下的动力响应 | |
| 引用本文： | 纪冲, 徐全军, 万文乾, 高福银, 宋克健. 钢质圆柱壳在侧向爆炸荷载下的动力响应[J]. 爆炸与冲击, 2014, 34(2): 137-144. doi: 10.11883/1001-1455(2014)02-0137-08 |
| 作者姓名： | 纪冲 徐全军 万文乾 高福银 宋克健 |
| 作者单位： | 1. 解放军理工大学，江苏 南京210007; 2. 总装工程兵技术装备研究所，江苏 无锡214035 |
| 基金项目： | 国家自然科学基金项目(11102233) |
| 摘 要： | 将壁厚为2.75mm、外径为100mm的钢质圆柱壳置于75g裸装圆柱形压装TNT药柱产生的爆炸场中进行冲击实验，获得了不同装药条件下圆柱壳的变形破坏特征。实验表明：非接触爆炸条件下，壳壁迎爆面局部破坏呈现碟型凹陷，同时沿壳体轴线方向产生了整体屈曲变形，且装药距离较大或药柱轴线与壳体轴线垂直放置情况下对壳体损伤程度较大；而接触爆炸时，壳壁发生破裂形成破口及破片。利用动力有限元程序LS-DYNA及Lagrangian-Eulerian流固耦合方法对圆柱壳的非线性动态响应过程进行数值模拟，分析了壳壁的屈曲变形过程及迎爆曲面中心点速度、位移时程曲线，计算结果与实验吻合较好。并基于数值计算确定了壳壁发生破裂的临界装药距离。 |
| 关 键 词： | 爆炸力学 动力响应 冲击实验 钢质圆柱壳 爆炸荷载 屈曲变形 |
| 收稿时间： | 2012-09-27 |
| 修稿时间： | 2013-01-27 |
Dynamic responses of steel cylindrical shells under lateral explosion loading |
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| Chong Ji, Quan-jun Xu, Wen-qian Wan, Fu-yin Gao, Ke-jian Song. Dynamic responses of steel cylindrical shells under lateral explosion loading[J]. Explosion And Shock Waves, 2014, 34(2): 137-144. doi: 10.11883/1001-1455(2014)02-0137-08 | |
| Authors: | Chong Ji Quan-jun Xu Wen-qian Wan Fu-yin Gao Ke-jian Song |
| Affiliation: | 1. PLA University of Science and Technology, Nanjing210007, Jiangsu, China; 2. Institute of Engineer Technical Equipment of the General Armaments Department, Wuxi 214035, Jiangsu, China |
| Abstract: | Bychoosingnakedcylindrical75-g-TNTchargesasexplosionsources,impactexperimentswerecarriedoutonsteelcylindricalshellswiththewallthicknessof2.75mmandtheouterdiameterof100mm.Thedamagecharacteristicsoftheshellswereobtainedunderdifferentexplosionconditions.Theexperimentalresultsshowthatsubjectedtonon-contactexplosion,thecylindricalshellwallfacingexplosiondeformsinadish-shapedpitandthewholebucklingdeformationwilloccuralongtheaxisofthecylindricalshelldirection.Thedamageofthecylindricalshellismoreseriouswhentheshell-to-chargedistanceisbiggerortheaxisofthechargeisperpendiculartotheaxisofthecylindricalshell.However,thecrevasseandfragmentwilloccurundertheconditionsofcontactexplosion.BymeansofLS-DYNA,thenonlineardynamicresponseprocessesofthecylindricalshellssubjectedtoexplosionloadingwerenumericallysimulatedwiththeLagrangianEuleriancouplingmethod.Thedeformationprocessesoftheshellwallsweredescribedaswellasthedisplacement-timeandvelocitytimecurvesoftheimpactpoints.Thenumericalsimulationresultsareingoodagreementwiththeexperimentaldata.Andbasedonthenumericalsimulations,thecriticalshell-to-chargedistancewasdeterminedforestimatingtheruptureoftheshellwall. |
| Keywords: | mechanicsofexplosion dynamicresponse impactexperiment steelcylindricalshell explosionloading bucklingdeformation')" href=" #" > bucklingdeformation |
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