摘要
本文针对反辐射武器攻击下舰船综合集成桅杆冲击环境的复杂性,以及综合集成桅杆本身的结构特点,结合复合材料抗爆抗冲击的相关理论,采取数值方法对综合集桅杆的动态响应特性进行研究。本研究旨在对复合材料夹层板在冲击及空爆载荷下的破坏形式进行研究,探讨现行综合集成桅杆的抗爆抗冲击性能,进而对其进行优化以提高其结构防护性能。
首先,分析综合集成桅杆的结构特点。根据其含有部分复合材料夹层板的特点,研究夹层板的基本理论,及数值计算的具体实现过程。本文将目前最常用的三明治夹芯板理论进行改进,引入一种既能较好地反映蒙皮层与芯层的应力分布及分层开裂情况,又能真实地模拟蒙皮层基体开裂毁伤形式的数值仿真方法。
其次,按照上述方法详细地建立夹层板局部模型,模拟破片冲击过程。对夹层板前后蒙皮层、芯层以及黏结层的破坏模式进行研究。总结出复合材料夹层板在冲击过程中破坏的三个阶段。设置相应工况,对综合集成桅杆复合材料雷达天线罩的抗弹性能进行分析。且通过大量的数值实验分析得到当前夹层板结构的弹道极限。
第三,按照相同原则建立适合的夹层板局部模型,模拟其受空爆载荷作用的过程。对夹层板前后蒙皮层、芯层以及黏结层的破坏模式进行研究。设置相应工况,对综合集成桅杆复合材料雷达天线罩的抗空爆性能进行分析。且通过大量的数值实验分析得到当前综合集成桅杆的抗冲击能力极限。
第四,对复合材料、夹层板结构以及桅杆整体结构进行最优选择以提高其结构防护性能。通过原模型与优化后模型各方面性能的对比分析,验证了优化结果的可行性,为日后综合集成桅杆的设计提供有益的参考。
The impulsive environment of the ship composite integrated mast under anti-radiation weapon is very complex. The numerical method to calculate the dynamic performance of the ship composite integrated mast is researched here based on some composite theories according to different structure features. This paper focuses on the damage form of composite sandwich plate under impact and explosion load. The antidetonation and shock resistance performance of the composite integrated mast employed in this paper is researched. And some optimization work has been done to increase its construction protective ability.
Firstly, analyze the design features of the composite integrated mast. Research the basic theory of sandwich plate and the simulation process by numerical calculation, corroding to the design feature of composite sandwich plate. In this paper, the sandwich plate theory is improved, and a numerical simulation method is indrafted, which could manifest the stress distribution in each layer while veritably simulate the delaminating of skin layer.
Secondly, establish local model of sandwich plate to simulate the chipping impacting process to research the damage mode of skin layers, core layer and glue layer. And through the research, three phases during impacting are summarized. The shock resistance performance of composite integrated mast is analyzed and the ballistic limit is got through a great deal of numerical calculations.
Thirdly, simulate the air explosion process with proper local model, research on the damage mode of skin layers, core layer and glue layer. The antidetonation performance of composite integrated mast is analyzed and the shock resistance ability limit is got through a great deal of numerical calculations.
Lastly, optimize the composite, the structure of sandwich plate and the overall structure of the mast to improve its structure protective performance. Validate the feasibility of the optimization result through the comparison analysis between two models, and offer some beneficial references to composite integrated mast design.
引文
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