舰船舱内爆炸载荷下Y形夹层板动响应及抗爆性能影响因素

Dynamic Response of Y-shaped Sandwich Plate and the Influence Factors of Anti Explosion Performance Under the Explosion Load in the Warship Cabin

针对反舰武器攻击下舰船结构抗毁伤防护问题,采用小型舱室模型实验结合有限元数值分析的方法,分析不同爆距下Y形夹层板结构的动响应特性,总结得到Y形夹层板结构面板的7种变形模式,发现面板变形模式与爆距和与其相连芯层刚度的相对强弱有关,爆距较小时面板易发生局部隆起变形,爆距较大则易发生整体碟形变形或板格变形,芯层强、面板弱时面板易发生板格变形,面板强、芯层弱时则易发生整体碟形变形,迎爆面板和V形芯层的刚度较大时背爆面面板则发生整体碟形变形。总结了Y形芯层在舱内爆炸载荷作用下的3种典型变形情况,即V屈曲I失稳、V屈曲I不变、V不变I不变;探究了迎爆面面板厚度、V形芯层厚度和I形芯层厚度对Y形夹层板结构抗爆性能的影响,发现增加迎爆面面板厚度和I形芯层厚度都可以显著降低背板变形,但增加迎爆面面板厚度会使得结构总吸能降低,增加I形芯层厚度则结构总吸能基本不变,增加V形芯层厚度则V形芯层吸能急剧下降,背板最大变形先增加再减小,结构总吸能下降。

In order to solve the problem of anti-damage protection of ships under attack by anti-ship weapons,the dynamic response process characteristics of Y-shaped sandwich panel structure under different blast distances are analyzed by means of small cabin model experiment and finite element numerical analysis.Seven deformation modes of Y-shaped sandwich panel structure are summarized.It is found that the deformation mode of the panel is related to the blast distance and the relative strength of the rigidity of the panel and its connecting core,When the explosion distance is small,the panel is prone to local bulge deformation.If the blasting distance is large,it is prone to overall dish deformation or plate lattice deformation.If the core layer is strong and the panel is weak,the panel is prone to plate lattice deformation.If the core layer is strong and the panel is weak,it is prone to overall dish deformation.If the rigidity of the blast facing panel and the V core layer is large,the overall dish deformation of the back blast face panel occurs.Three typical deformation conditions of the Y core layer under the explosion load in the cabin are summarized,namely V buckling I instability V buckling I is constant,V is constant and I is constant;The influence of the thickness of the panel on the blasting surface,the thickness of the v-core layer and the thickness of the I-core layer on the anti-explosion performance of the Y-shaped sandwich panel structure is investigated.It is found that increasing the thickness of the panel on the blasting surface and the thickness of the I-core layer can significantly reduce the deformation of the back plate,but increasing the thickness of the panel on the blasting surface will reduce the total energy absorption of the structure,while increasing the thickness of the I-core layer will basically keep the total energy absorption of the structure unchanged.Increasing the thickness of the v-core layer,the energy absorption of the v-core layer will sharply decrease,and the maximum deformation,The total energy absorption of the structure decreases.