开口截面拉胀超结构动力失稳分析  

Dynamic instability analysis of auxetic structure with opened section

作　　者：吴梦景 朱珏[1] 黄栩浩 WU Mengjing;ZHU Jue;HUANG Xuhao(Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline,Ningbo University,Ningbo 315211,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Hwaway Technology Co.,Ltd.,Zhuji 311800,China)

机构地区：[1]宁波大学压力容器与管道安全浙江省工程研究中心,浙江宁波315211 [2]中国矿业大学力学与土木工程学院,江苏徐州221116 [3]华纬科技股份有限公司,浙江诸暨311800

出　　处：《宁波大学学报(理工版)》2025年第2期86-93,共8页Journal of Ningbo University:Natural Science and Engineering Edition

基　　金：国家自然科学基金(12102214);宁波市自然科学基金(2022J128,2022J090).

摘　　要：针对碳纳米管增强复合材料开口截面构件动力失稳行为展开分析.基于一阶剪切板理论与有限条方法,推导出构件动力失稳的运动方程,并采用Bolotin方法获得2T周期对应的特征方程,进而得到结构的基础动力失稳区域;随后基于该模型分析了不同碳纳米管含量、拉胀效应以及卷边是否加劲对构件动力失稳响应的影响.结果显示,三者皆可不同程度提升构件动力失稳频率,但卷边加劲的强化效应会随其自身宽度增大而导致局部屈曲,从而致使结构刚度弱化.In this work,the dynamic instability behavior of carbon nanotube-reinforced composite(CNTRC)structures with opened section is analyzed.The motion equations for the static and dynamic instability are derived based on the first-order shear plate theory and finite strip method.Further,the characteristic equations with 2T period are obtained by using Bolotin method,and the major dynamic instability regions of the structure are given.Subsequently,based on this model,the effects of different carbon nanotube volume,auxetic effect and lip stiffener on the dynamic instability response of the structures are investigated.The results show that above factors can increase the frequency of dynamic instability,but the strengthening effect of the stiffener will be weakened with the occurrence of local buckling caused by its own width being too large.

关 键 词：板件相互作用 动力失稳 拉胀效应 有限条方法 Bolotin方法 

分 类 号：O347.2[理学—固体力学]