超大型浮体柔性夹层连接器力学性能研究  

Study on mechanical property of connector with flexible sandwich of very large floating structures

作　　者：张浩[1] 祁恩荣[1] 宋恒[2] 李志伟[1] 夏劲松[1] ZHANG Hao;QI En-rong;SONG Heng;LI Zhi-wei;XIA Jin-song(China Ship Scientific Research Center,Wuxi 214082,China;Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《船舶力学》2019年第2期200-210,共11页Journal of Ship Mechanics

基　　金：国家重点基础研究发展计划("973"计划)项目"海洋超大型浮体复杂环境响应与结构安全性"资助(2013CB036100)

摘　　要：考虑连接器作为超大型浮体最为薄弱的构件之一,研究带有柔性夹层连接器的力学特性,旨在明确柔性夹层对连接器的刚度和应力变化的影响。文章将钢与柔性夹层的层合本构模型与接触力学分析手段相结合建立计算理论,以提高计算效率和收敛性。并开展验证性实验,通过对比实验与计算结果,发现该理论方法计算所得结果与实验数据吻合良好。应用该计算理论,进一步对连接器进行力学分析,分别获得超弹性橡胶和尼龙作为柔性夹层时连接器的力学特性和刚度变化曲线,并获得不同厚度,初始弹性模量和泊松比对这一结果的影响程度。分析发现,柔性夹层的软硬程度对连接器的应力水平与应力分布影响显著,同时材料参数的变化对于连接器的刚度变化影响较大,因此,连接器柔性夹层的选取是一个双因素问题,可根据实际需要,对柔性夹层材料进行参数优化,既得到合理的连接器刚度,又将连接器应力水平控制在合理范围内。Connector is one of the weakness components in very large floating structure,study on its mechanical property is very necessary to define the impact of flexible sandwich on stiffness and stress of connector.To improve computational efficiency,theory of combining contact mechanics and laminating constitutive model is established.Model test is done to prove the theory,and results of computation correspond with the model test.Mechanical property of connector is analyzed by establishing laminating constitutive model of steel and flexible sandwich,based on this theory.The stress and stiffness of connector with nylon or rubber sandwich are calculated.The impact of thickness,elasticity modulus and Poisson’s ratio of flexible sandwich on stress and stiffness of connector is also investigated.The results show that nylon and rubber sandwich affect stress and stiffness of connector significantly,stress distribution of connector is different because of different rigidity.The good mechanical property of connector is found by choosing the optimal factors of flexible sandwich.

关 键 词：连接器 层合本构模型 柔性夹层 接触力学 

分 类 号：U661.4[交通运输工程—船舶及航道工程]