宏观负泊松比效应蜂窝基座及防护结构减振与抗爆性能设计

发布时间：2018-03-15 06:22

本文选题：负泊松比材料　切入点：蜂窝结构　出处：《上海交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：减振降噪及抗爆安全性设计技术是军用舰艇隐身性能与生命力设计重要研究方向，，具有重要理论和工程应用价值。舰艇常规减振抗冲击结构型式及结构材料研究至今，已难有大突破，必须考虑创新的结构型式与特殊材料。蜂窝多孔材料具有重量轻、抗冲击、隔热和隔声性能优良等优点，常作为芯材使用，较少作为承载主结构。本论文提出并设计了可作为主承载结构的具有宏观正泊松比效应和宏观负泊松比效应的新型船用蜂窝隔振器及隔振基座。从强度、刚度、动力学特性及振级落差等角度，探讨了两种蜂窝隔振器和隔振基座的减振效果。对船舶新型宏观负泊松比效应蜂窝隔振器或基座的形状及尺寸设计方法开展研究，探讨了蜂窝壁厚和形状参数对基座或隔振器整体隔振性能影响。其次，建立蜂窝夹芯隔振器动力学优化设计模型，优化结果证明了形状参数影响曲线的有效性，可供负泊松比蜂窝夹芯船舶隔振器的设计参考。对采用钢面板和复合材料面板的该类组合结构减振器及基座的力学性能也进行了对比研究。抗爆抗冲击性能作为军舰生命力的一个重要指标，各国海军和研究人员都进行了大量的研究，从最初的单层防护结构到多层防雷舱结构再到各种新型夹层结构，舰艇抗爆性能有了质的飞越。杨德庆提出了一种具有宏观负泊松比效应的新型蜂窝舷侧防护结构，本文对水下接触爆炸环境下该新型防护结构抗爆性能进行了研究。首先对比研究了蜂窝防护结构与无夹芯双层板防护结构、单层板防护结构之间的抗爆性能差异。其次，分析了正泊松比蜂窝防护结构和负泊松比效应蜂窝防护结构的损伤过程，分为四个阶段并进行了对比。最后，对比研究了不同蜂窝芯材料以及蜂窝胞元层数对防护结构抗爆性能的影响，从而为蜂窝材料和蜂窝层数的设计选取提供指导。
[Abstract]:The design technology of vibration and noise reduction and anti-explosion safety is an important research direction of stealth performance and vitality design of military ships, and has important theoretical and engineering application value. It is difficult to make a breakthrough, so it is necessary to consider innovative structural forms and special materials. Honeycomb porous materials have the advantages of light weight, shock resistance, heat insulation and sound insulation, and are often used as core materials. This paper presents and designs a new type of honeycomb vibration isolator and isolation base with macroscopical positive Poisson's ratio effect and macro negative Poisson's ratio effect which can be used as main bearing structure. In this paper, the vibration absorption effects of two kinds of honeycomb isolators and isolation bases are discussed from the angle of dynamic characteristics and vibration level drop. The shape and size design methods of the new macroscopically negative Poisson's ratio effect honeycomb isolators or bases are studied. The effects of honeycomb wall thickness and shape parameters on the overall vibration isolation performance of the base or isolator are discussed. Secondly, the dynamic optimization design model of the honeycomb sandwich isolator is established, and the optimization results prove the effectiveness of the shape parameter influence curve. It can be used as a reference for the design of negative Poisson's ratio honeycomb sandwich ship vibration isolator. The mechanical properties of the shock absorber and base of this kind of composite structure with steel panel and composite panel are also studied. As an important index of the vitality of warships, the anti-explosion and shock resistance performance has been studied by the navies and researchers of many countries, from the original single-layer protective structure to the multi-layer lightning proof cabin structure to various new sandwich structures. The anti-explosion performance of the warship has a qualitative overflight. Yang Deqing proposed a new type of honeycomb side protection structure with macroscopic negative Poisson's ratio effect. In this paper, the anti-explosion performance of the new protective structure under underwater contact explosion is studied. Firstly, the difference between honeycomb protective structure and sandwich double-layer plate structure and single-layer plate protection structure is compared. The damage process of positive Poisson's ratio honeycomb protective structure and negative Poisson's ratio effect honeycomb protective structure is analyzed, which is divided into four stages and compared. The effects of different honeycomb core materials and the number of honeycomb cell layers on the anti-explosion performance of the protective structure were studied, thus providing guidance for the design and selection of honeycomb materials and honeycomb layers.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U674.70

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