开口角度对复合材料夹芯圆柱壳自由振动的影响  

Effect of opening angle on free vibration of composite sandwich cylindrical shells

作　　者：翟彦春 岳修杰 王鹏昊 张平 于晓 ZHAI Yan-chun;YUE Xiu-jie;WANG Peng-hao;ZHANG Ping;YU Xiao(College of Intelligent Manufacturing,Qingdao Huanghai University,Qingdao 266520,China;College of Mechanical and Electrical Engineering,Shandong University of Science and Technology,Qingdao 266520,China)

机构地区：[1]青岛黄海学院智能制造学院,青岛266520 [2]山东科技大学机械电子工程学院,青岛266520

出　　处：《复合材料科学与工程》2022年第2期19-22,共4页Composites Science and Engineering

基　　金：国家自然科学基金资助项目(51705270);山东省青创计划项目(2019KJB022)。

摘　　要：基于一阶折线位移模型和哈密尔顿原理,推导了复合材料夹芯开口圆柱壳结构动力学方程;探索了开口角度对结构自由振动的影响。结果表明:随着开口角度的增大,一阶模态损耗因子表现出逐渐减小的趋势,且当开口角度小于某一数值前,减小速度较快。短开口壳的一阶模态频率逐渐增大;长开口壳的一阶模态频率表现出先减小后增大的变化趋势。Based on the first-order piecewise displacement model and Hamilton′s principle, the structural dynamics equation of composite sandwich cylindrical shell is derived. The influence of the opening angle on the free vibration of the structure is explored. The results show that with the increase of the opening angle, the first-order mode loss factor gradually decreases, and when the opening angle is less than a certain value, the reduction rate is faster. The first mode frequency of the short shell increases gradually. The first order modal frequency of the long shell shows a tendency of decreasing first and then increasing.

关 键 词：复合材料圆柱壳 开口角度 自由振动 一阶折线位移理论 

分 类 号：TB332[一般工业技术—材料科学与工程]