嵌入双层阻尼薄膜共固化复合材料带筋结构的自由振动  

Free vibration of co-cured composite stiffened structure embedded with double-layer damping films

作　　者：王绍清 郑长升 梁森 WANG Shaoqing;ZHENG Changsheng;LIANG Sen(College of Mechanical and Automotive Engineering,Liaocheng University,Liaocheng 252000,China;College of Intelligent Manufacturing,Weifang College of Science and Technology,Weifang 262700,China;College of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266000,China)

机构地区：[1]聊城大学机械与汽车工程学院,山东聊城252000 [2]潍坊科技学院,智能制造学院,山东潍坊262700 [3]青岛理工大学机械与汽车工程学院,山东青岛266000

出　　处：《振动与冲击》2022年第23期293-299,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(52075280);山东省自然科学基金(ZR2019MEE088);聊城大学博士科研启动基金(318052212)。

摘　　要：为探究嵌入双层阻尼薄膜共固化复合材料带筋结构的振动特性,根据一阶剪切变形理论建立了该结构的动力学解析模型,将复模量理论和复合材料力学理论相结合,推导了其复数形式的控制方程,采用纳维法得到了满足位移边界条件的理论解,将理论解同有限元结果进行对比,验证了该模型的有效性。进一步利用已验证理论模型分析了结构的几何和材料参数对其动力学特性的影响。结果表明:结构固有频率随着筋条高度和宽度的增大而增大;随着筋条高度和宽度的增加,结构损耗因子随之减小;当两阻尼层剪切模量之比较大时,结构的固有频率和损耗因子对其剪切模量之比的变化不再敏感。Here, to explore vibration characteristics of co-cured composite stiffened structure embedded with double-layer damping films, the structure’s dynamic analytical model was established based on the first-order shear deformation theory. Its control equation in complex form was derived by combining the complex modulus theory and the composite mechanics theory. The theoretical solution satisfying displacement boundary conditions was obtained by using Navier method. The theoretical solution was compared with the finite element results to verify the effectiveness of the model. Furthermore, effects of the structure’s geometric and material parameters on its dynamic characteristics were analyzed by using the verified theoretical model. The results showed that the structure’s natural frequencies increase with increase in height and width of ribs;with increase in rib height and width, the structure’s loss factors decrease;when the shear modulus ratio of two damping layers is larger, the structure’s natural frequencies and loss factors are no longer sensitive to change of shear modulus ratio of two damping layers.

关 键 词：粘弹性材料 共固化 固有频率 损耗因子 带筋结构 

分 类 号：TB332[一般工业技术—材料科学与工程]