不同泊松比蜂窝夹芯结构的抗爆性能对比分析

Comparative analysis of explosion resistance of honeycomb sandwich structures with different Poisson′s ratios

蜂窝夹芯结构以优异的抗冲击性能广泛应用于舰船爆炸防护领域,为了探究泊松比对蜂窝夹芯结构抗爆性能的影响,本文对不同泊松比蜂窝夹芯结构的水下抗爆性能进行数值分析。选用等效相对密度和等效弹性模量相同的正/负/零3类泊松比蜂窝夹芯结构,采用数值方法对其水下抗爆性能进对比分析,综合分析了不同泊松比蜂窝结构在水下爆炸载荷作用时的破口尺寸、背板中心点最大位移和无量纲归一化处理的总吸能值,得到零泊松比四角星形蜂窝的综合抗爆性能最优,负泊松比蜂窝次之,正六边形蜂窝最差,为蜂窝夹芯结构在水下爆炸防护结构的应用提供参考。

The honeycomb sandwich structure is widely used in ship explosion protection due to its excellent impact resistance. To explore the effect of Poisson′s ratio on the anti-knock performance of honeycomb sandwich structures, a numerical analysis of the underwater anti-knock performance of honeycomb sandwich structures with different Poisson′s ratios is conducted in this paper. Different honeycomb sandwich structures with three types of Poisson′s ratio(positive/negative/zero) and the same relative density and elastic modulus are selected, and the underwater anti-knock performance is compared and analyzed by using the numerical method. The size of the breach, the maximum displacement of the center point of the backing plate, and the total energy absorption value of dimensionless normalization when the structure is subjected to underwater explosion loads are analyzed comprehensively. Results show that the comprehensive anti-knock performance of the four-pointed star honeycomb with zero Poisson′s ratio is the best, followed by the honeycomb with negative Poisson′s ratio, and the hexagonal honeycomb has the worst anti-knock performance, which provides a reference for the application of honeycomb sandwich structure in underwater explosion protection structure.