多层复合舰用装甲结构抗高速破片特性比较研究

Energy Absorption Mechanism of MCFS Structure Impacted by High Velocity FSP

基于舰船舱壁防火、抗爆和抗高速破片冲击等综合防护需求,提出钢/陶瓷棉/FRP隔热对称式多层复合防护结构形式(简称MCFS结构)。针对MCFS结构和钢/FRP对称式夹层结构(简称MFS结构)在高速(>1000 m/s)破片模拟弹冲击下的损伤及吸能特性进行试验研究,结果显示,弹道冲击下MCFS结构的典型破坏模式为:前置钢板层以剪切破坏为主,FRP层表现为较大范围凸起变形和显著分层,隔热陶瓷棉的存在没有明显限制中间FRP层抗弹吸能形变,后置钢板层的变形模式类似钢板低速冲击下的变形模式;MFS结构的典型破坏模式为:FRP层表现为小尺度局部凸起,无明显分层现象,后置钢板层对FRP有较强的整体抗弯支撑作用,出现较大范围的凸起形变。对比面密度相当条件下两种结构的抗弹性能,MCFS结构由于隔热缓冲层的设置,抗弹性能明显优于紧密贴合的MFS结构形式。文中同时结合钢板和FRP结构单一抗弹吸能试验结果,综合分析了MCFS结构抗高速破片冲击吸能效率和抗弹机理,认为MCFS结构抗弹性能优异的机理在于中间FRP层的抗弹性能得到了充分发挥,从而导致其总体吸能效率高于FRP/钢无间隙复合结构。

Under common demands of warship structure for fireproof, blastfroof and high velocity fragment resistance, the MCFS structure, a symmtrical multi-lays composite structure,which is made up of steel plate, heat insulation cushion and FRP, has been putted forward. The comparative experimental research for deformation and energy absorption property of MCFS and MFS （steel/FRP/steel sandwich） structures has been carried out. The experiment results show that the frontal steel plate has similar deformation model for the two structures. However, the deformation model of mid-lay FRP is different, the large deformation and heave of back face in MCFS and the ceramics cotton has little limit for the deformation of mid-lay FtLP, but there is no visible deformtion cone in MFS. The ballistic experimental results show that the ability of fragments resistance and impact energy ab- sorbing of MCFS is superior to MFS with the same weight per area. At the same time, the ballistic impact experiments for single steel target and single FRP laminates also have been done, the energy absorbing mechanism of MCFS is analysied on the base of experiments above.