夹层板在舰船舷侧防护结构中的应用

水面舰船抗水下爆炸的性能是舰船生命力的重要方面,深受各国海军重视.以某型水面舰船为研究对象,基于夹层板进行舷侧结构设计;选取典型工况,采用三舱段模型技术,使用MSC.Dytran对夹层板舷侧结构在水下爆炸冲击波载荷作用下的动态响应进行仿真计算.比较分析了流-固耦合力、结构变形、速度、加速度、吸能等重要力学性能.结果表明夹层板应用于舰船舷侧结构使得结构的变形、位移减小,结构塑性吸能增加,显著改善了结构的冲击环境.夹层板是一种防护性能优良的结构形式,吸能效率较高,还减小了冲击波压力及冲量的吸收及传递,对减小舰船其它部位结构的损伤防护起到重要作用.

Application of Sandwich Panel in Anti-shock Design of Warship's Side Structure

Performance of resisting shock wave impact of underwater explosion is an important aspect of warship survivability. Navy around the word have carried out series researches. TFSP(Triangle Folded Sandwich Panel) and SHSP(Square Honeycomb Sandwich Panel)are applied in the double bottom structures of warship. The numerical method of three-cargo finite model is used to do numerical trial for traditional, TFSP and SHSP side structure respectively under underwater non-contact explosion. The dynamic responses including fluid-structure interact forces, deformation, energy absorption, acceleration and velocity are calculated by MSC.Dytran and compared. The results show that the sandwich panels used in warship bottom structure can reduce displacement and add energy absorption, at same time significantly improve shock environment. The sandwich panel side structure is a protective structure with excellent antic-shock performance. Sandwich panel has higher energy absorption efficiency. Core structure of sandwich panel play important role in reducing the deformation, fluid-structure force and impulse momentum.