CAJ | 학술논문

采用实验与数值模拟相结合方法，对充液及内空圆柱壳在爆炸载荷下动力屈曲响应特性进行对比研究。将壁厚δ＝2．0 mm、外径Φ＝100 mm钢圆柱壳（内空及充水）置于75 gTNT药柱、200 gTNT药柱产生的爆炸场中进行冲击实验，获得不同工况下圆柱壳变形破坏模式。利用动力有限元程序LS-DYNA及Lagrangian-Eulerian流固耦合方法进行数值计算，分析壳壁屈曲变形过程及壳壁关键点速度、水介质内压力等动态参数。计算结果与实验结果一致性较好。研究表明，由于内充水介质的近似不可压缩性，承受冲击荷载时内压增大，因而参与对外界爆炸冲击载荷抗力作用，圆柱壳抗爆能力显著提高。
채용실험여수치모의상결합방법，대충액급내공원주각재폭작재하하동력굴곡향응특성진행대비연구。장벽후δ＝2．0 mm、외경Φ＝100 mm강원주각（내공급충수）치우75 gTNT약주、200 gTNT약주산생적폭작장중진행충격실험，획득불동공황하원주각변형파배모식。이용동력유한원정서LS-DYNA급Lagrangian-Eulerian류고우합방법진행수치계산，분석각벽굴곡변형과정급각벽관건점속도、수개질내압력등동태삼수。계산결과여실험결과일치성교호。연구표명，유우내충수개질적근사불가압축성，승수충격하재시내압증대，인이삼여대외계폭작충격재하항력작용，원주각항폭능력현저제고。
Experimental and numerical simulation investigations were carried out on the dynamic buckling response of the liquid-filled and hallow thin-wall cylindrical shells subjected to lateral explosion loading.Impact experiments of explosion loading caused by 75g and 200g TNT charge on the steel cylindrical shells were carried out.The deformation modes of cylindrical shells were obtained under different explosion conditions.By means of the finite element computer code LS-DYNA,the nonlinear dynamic response process of the cylindrical shells subjected to explosion loading were numerically simulated with Lagrangian-Eulerian fluid-solid coupling method.The deformation process of the shell-wall, the time history of the velocities at some key nodes on the cylindrical shell and the internal pressure of water were described.The numerical simulation results are in good agreement with experimental data.The results show that the internal pressure of water will increase when subjected to impact loading because of the incompressibility of water medium, and liquid-filled cylindrical shells have better impact resistance than hallow cylindrical shells.