复合材料层合板在水下多层防护结构中的抗爆效能

Anti-explosion Performance of Composite Laminates in Underwater Multi-layer Defensive Structure

大型舰船一般设置水下多层防护结构以实现对重要舱室的防护。随着舰船设计中对总体资源及质量代价的要求越来越高,在多层防护结构内层应用吸能能力强的轻质复合材料是一种解决问题的新方法,但目前相关研究较少。借助有限元分析软件LS-DYNA中的任意朗格朗日-欧拉算法,研究典型舰船水下防护结构,对其中第2纵壁和第3纵壁采用碳纤维层合板结构形式,通过数值仿真分析不同铺层方式下层合板结构的抗冲击、防护性能。结果表明:第2纵壁以冲击方式为主,复合材料层合板90°铺层角度最好;第3纵壁以振动为主。该结论提供了一种构建轻质多层防护结构的新思路,可为多舱水下防护结构的研究、设计和优化提供参考。

Large ships and warships are generally equipped with underwater multi-layer defensive structures to protect important cabins.With the increasing demand for aggregate resource and weight costs in ship design,the application of lightweight composite materials with strong energy absorption ability in the inner layer of multi-layer defensive structure is a new method to solve the problem.However,there are few relevant studies about it.In this paper,the structural form of carbon fiber laminates is used for the second and third longitudinal bulkheads of typical underwater defensive structure.With the aid of arbitrary Lagrangian-Eulerian algorithm in the finite element analysis software LS-DYNA,the composite laminate structures using different laying methods were simulated to study their anti-explosion performances.The simulated results show that the second longitudinal bulkhead is mainly subjected to impact,and the best stacking angle of composite laminates is 90°;the third longitudinal bulkhead is mainly subjected to vibration.The research results obtained in this paper provide a new idea for the construction of lightweight multi-layer protective structure,aiming to provide reference for the research,design and optimization of underwater multi-layer defensive structure.