Abstract: Military ships are easily affected by the far-field underwater explosion in war. Although the shock wave load and bubble pulsation load produced by the explosion will not cause serious damage to the hull structure, but with large plastic deformation. At present, the anti-explosion protection structure of the warships with good anti-explosion performance, less space and mass resource is demanding further research. In the current study, the acoustic-structure coupling method is used to calculate the dynamic response of the stiffened plate structure and the macroscopic negative Poisson's ratio grillage structure under the far-field underwater explosion, comparing and analyzing the far-field anti-explosion performance of the stiffened plate structure and the macroscopic negative Poisson's ratio grillage structure. The results show that the macroscopic negative Poisson's ratio grillage structure has better far-field underwater anti-explosion performance than the stiffened plate structure. The influence of each parameter on the far-field underwater anti-explosion performance of the macroscopic negative Poisson's ratio grillage structure is then studied by changing the parameter of the macro negative Poisson's ratio grillage structure. It provides reference for the application of the macro negative Poisson's ratio grillage structure to improve the anti-explosion performance in engineering.

Key words: far-field underwater explosion, macroscopic negative poisson's ratio structure, structural anti-explosion performance

摘要： 舰船在战争中极易遭受远场水下爆炸的影响,爆炸产生的冲击波载荷和气泡脉动载荷对于船体结构虽不至于产生严重的破损,但通常会出现较大的塑性变形。目前,抗爆性能好、占用空间和质量资源更少的舰船抗爆防护结构形式正待进一步研究。文中采用声固耦合法计算加筋板结构和宏观负泊松比板架结构在远场水下爆炸作用下的结构动响应,对比分析加筋板结构和宏观负泊松比板架结构的远场水下抗爆性能,研究结果表明宏观负泊松比板架结构水下远场抗爆性能优于加筋板结构。在此基础上变化宏观负泊松比板架结构各参数,研究各参数对宏观负泊松比板架结构远场水下抗爆性能的影响,可为工程中应用宏观负泊松比板架结构提高抗爆性能提供参考。

关键词: 远场水下爆炸, 宏观负泊松比结构, 结构抗爆性能