夹芯强度对新型液舱防护效能的影响

Influence of core strength on protection efficiency for new safety liquid cabin

舰船防护液舱在高速弹体作用下会发生大变形,防护难度较大。文章对新型防护液舱结构进行了分析,建立了含方格夹层板的液舱结构模型,通过与实验数据对比验证了数值计算方法的有效性,并对不同弹体速度、不同芯层强度下的夹层板防护效能进行了比较,并进行了机理分析。研究结果表明:(1)适当降低芯层强度能降低液舱前后板测点的压力载荷和比冲量,明显降低液舱前板的塑性变形;(2)芯层强度降低提高防护效能的主要机理是减小了液舱中的超空泡滞后流;(3)液舱新型防护夹层设计应考虑具体侵彻弹体载荷,适当降低芯层强度的同时应避免防护夹层前后壁发生贴合碰撞。研究结论为新一代航母防护液舱设计提供了参考。

It is really hard to protect liquid cabin plates under high speed projectile penetration.New sandwich plates of safety liquid cabin were studied and speculated,and number model was set up to investigate new sandwich plates protection efficiency.Comparing super-cavitation and projectile velocity,validity of number simulation was gained.After that,some cases of different projectile velocity and core plates thickness were carried out.The results show that:(1)There is obvious decrease in impulse and deformation for front plates when core plate thickness reduced;(2)The main mechanism for the new sandwich plates deformation of different core strength is the after flow;(3)The projectile loading should be considered designing the new sandwich plates to avoid crash of plates.The conclusions provide a reference for the design of the new generation aircraft carrier safety liquid cabin.