球形密闭夹芯结构在内爆载荷作用下的响应分析
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摘要
轻质夹芯结构在能量吸收领域有很广泛的应用。本文采用数值仿真的方法分析了球形密闭夹芯结构在内爆载荷作用下的动态响应。发现与主要靠夹芯层吸能的平板或曲板结构不同,球形密闭夹芯结构的内壁在能量耗散中起关键作用。与相同质量的均质球壳相比,夹芯层可以有效地降低外壁的变形和应力水平。此外,利用理论分析的方法,得出了几何尺寸对球形夹芯结构能量吸收特性的影响。最后指出,在爆炸容器的设计中,如果充分利用球形夹芯结构的内壁进行耗能,可以显著提高结构的抗爆当量。
The light-weighted sandwich structures are widely used in the field of energy absorption. The dynamic response of the spherical sandwich structure under inner blast loading is analyzed by means of numerical simulation. It is found that the inner wall of the spherical sandwich structure plays a key role in energy dissipation, which is different to that of the flat or curved sandwich plate. Compared with homogeneous spherical shell of the same mass, the core of spherical sandwich structure can effectively reduce the deformation and stress level of the outer wall. In addition, the influence of geometric size on energy absorption of spherical sandwich structure is obtained by theoretical analysis. Finally, it is pointed out that in the design of the explosive vessel, if the energy consumption of the inner wall of the spherical sandwich structure is fully utilized,the anti-explosive equivalent can be remarkably improved.
The light-weighted sandwich structures are widely used in the field of energy absorption. The dynamic response of the spherical sandwich structure under inner blast loading is analyzed by means of numerical simulation. It is found that the inner wall of the spherical sandwich structure plays a key role in energy dissipation, which is different to that of the flat or curved sandwich plate. Compared with homogeneous spherical shell of the same mass, the core of spherical sandwich structure can effectively reduce the deformation and stress level of the outer wall. In addition, the influence of geometric size on energy absorption of spherical sandwich structure is obtained by theoretical analysis. Finally, it is pointed out that in the design of the explosive vessel, if the energy consumption of the inner wall of the spherical sandwich structure is fully utilized,the anti-explosive equivalent can be remarkably improved.
引文
1 Zhu F,Zhao L,Lu G,et al.Deformation and failure of blast-loaded metallic sandwich panels—experimental investigations.International Journal of Impact Engineering,2008,35(8):937-951
2 Zhu F,Zhao L,Lu G,et al.Structural response and energy absorption of sandwich panels with an aluminium foam core under blast loading.Advances in Structural Engineering,2008,11(5):525-536
3 Zhu F,Wang Z,Lu G,et al.Analytical investigation and optimal design of sandwich panels subjected to shock loading.Materials&Design,2009,30(1):91-100
4 Zhu F,Wang Z,Lu G,et al.Some theoretical considerations on the dynamic response of sandwich structures under impulsive loading.International Journal of Impact Engineering,2010,37(6):625-637
5 Qi C,Yang S,Yang LJ,et al.Blast resistance and multiobjective optimization of aluminum foam-cored sandwich panels.Composite Structures,2013,105:45-57
6 敬霖,王志华,赵隆茂.多孔金属及其夹芯结构力学性能的研究进展.力学与实践,2015,37(1):1-24
7 张钱城,郝方楠,李裕春等.爆炸冲击载荷作用下车辆和人员的损伤与防护.力学与实践,2014,36(5):527-539
8 Shen J,Lu G,Wang Z,et al.Experiments on curved sandwich panels under blast loading.International Journal of Impact Engineering,2010,37(9):960-970
9 Shen J,Lu G,Zhao L,et al.Response of curved sandwich panels subjected to blast loading.Journal of Performance of Constructed Facilities,2011,25(5):382-393
10 Jing L,Wang Z,Zhao L.Dynamic response of cylindrical sandwich shells with metallic foam cores under blast loading—numerical simulations.Composite Structures,2013,99:213-223
11 Jing L,Wang Z,Shim VPW,et al.An experimental study of the dynamic response of cylindrical sandwich shells with metallic foam cores subjected to blast loading.International Journal of Impact Engineering,2014,71:60-72
12 Jing L,Yang F,Wang Z,et al.A numerical simulation of metallic cylindrical sandwich shell subjected to air blast loading.Latin American Journal of Solids&Structures,2013,10(3):631-645
13 Jing L,Xi C,Wang Z,et al.Energy absorption and failure mechanism of metallic cylindrical sandwich shells under impact loading.Materials&Design,2013,52(24):470-480
14 Jing L,Wang Z,Zhao L.An approximate theoretical analysis for clamped cylindrical sandwich shells with metallic foam cores subjected to impulsive loading.Composites Part B:Engineering,2014,60(1):150-157
15 Jing L,Wang Z,Zhao L.Response of metallic cylindrical sandwich shells subjected to projectile impact—experimental investigations.Composite Structures,2014,107(1):36-47
16 Fatt MSH,Surabhi H.Blast resistance and energy absorption of foam-core cylindrical sandwich shells under external blast.Composite Structures,2012,94(11):3174-3185
17 Liu X,Tian X,Lu TJ,et al.Blast resistance of sandwichwalled hollow cylinders with graded metallic foam cores.Composite Structures,2012,94(8):2485-2493
18 Li S,Wang Z,Wu G,et al.Dynamic response of sandwich spherical shell with graded metallic foam cores subjected to blast loading.Composites Part A:Applied Science and Manufacturing,2014,56(1):262-271
19 Li W,Huang G,Bai Y,et al.Dynamic response of spherical sandwich shells with metallic foam core under external air blast loading—numerical simulation.Composite Structures,2014,116(1):612-625
20 Hanssen AG,Hopperstad OS,Langseth M,et al.Validation of constitutive models applicable to aluminium foams.International Journal of Mechanical Sciences,2002,44(2):359-406
2 Zhu F,Zhao L,Lu G,et al.Structural response and energy absorption of sandwich panels with an aluminium foam core under blast loading.Advances in Structural Engineering,2008,11(5):525-536
3 Zhu F,Wang Z,Lu G,et al.Analytical investigation and optimal design of sandwich panels subjected to shock loading.Materials&Design,2009,30(1):91-100
4 Zhu F,Wang Z,Lu G,et al.Some theoretical considerations on the dynamic response of sandwich structures under impulsive loading.International Journal of Impact Engineering,2010,37(6):625-637
5 Qi C,Yang S,Yang LJ,et al.Blast resistance and multiobjective optimization of aluminum foam-cored sandwich panels.Composite Structures,2013,105:45-57
6 敬霖,王志华,赵隆茂.多孔金属及其夹芯结构力学性能的研究进展.力学与实践,2015,37(1):1-24
7 张钱城,郝方楠,李裕春等.爆炸冲击载荷作用下车辆和人员的损伤与防护.力学与实践,2014,36(5):527-539
8 Shen J,Lu G,Wang Z,et al.Experiments on curved sandwich panels under blast loading.International Journal of Impact Engineering,2010,37(9):960-970
9 Shen J,Lu G,Zhao L,et al.Response of curved sandwich panels subjected to blast loading.Journal of Performance of Constructed Facilities,2011,25(5):382-393
10 Jing L,Wang Z,Zhao L.Dynamic response of cylindrical sandwich shells with metallic foam cores under blast loading—numerical simulations.Composite Structures,2013,99:213-223
11 Jing L,Wang Z,Shim VPW,et al.An experimental study of the dynamic response of cylindrical sandwich shells with metallic foam cores subjected to blast loading.International Journal of Impact Engineering,2014,71:60-72
12 Jing L,Yang F,Wang Z,et al.A numerical simulation of metallic cylindrical sandwich shell subjected to air blast loading.Latin American Journal of Solids&Structures,2013,10(3):631-645
13 Jing L,Xi C,Wang Z,et al.Energy absorption and failure mechanism of metallic cylindrical sandwich shells under impact loading.Materials&Design,2013,52(24):470-480
14 Jing L,Wang Z,Zhao L.An approximate theoretical analysis for clamped cylindrical sandwich shells with metallic foam cores subjected to impulsive loading.Composites Part B:Engineering,2014,60(1):150-157
15 Jing L,Wang Z,Zhao L.Response of metallic cylindrical sandwich shells subjected to projectile impact—experimental investigations.Composite Structures,2014,107(1):36-47
16 Fatt MSH,Surabhi H.Blast resistance and energy absorption of foam-core cylindrical sandwich shells under external blast.Composite Structures,2012,94(11):3174-3185
17 Liu X,Tian X,Lu TJ,et al.Blast resistance of sandwichwalled hollow cylinders with graded metallic foam cores.Composite Structures,2012,94(8):2485-2493
18 Li S,Wang Z,Wu G,et al.Dynamic response of sandwich spherical shell with graded metallic foam cores subjected to blast loading.Composites Part A:Applied Science and Manufacturing,2014,56(1):262-271
19 Li W,Huang G,Bai Y,et al.Dynamic response of spherical sandwich shells with metallic foam core under external air blast loading—numerical simulation.Composite Structures,2014,116(1):612-625
20 Hanssen AG,Hopperstad OS,Langseth M,et al.Validation of constitutive models applicable to aluminium foams.International Journal of Mechanical Sciences,2002,44(2):359-406