Vibration characteristics of circular composite sandwich cylindrical shells with soft core

• Published in: Polymer composites Vol. 43; no. 8; pp. 5404 - 5417
• Main Authors: Dong, Xiaowen, Yin, Bo, Li, Yanzhao, Zhai, Yanchun
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 01.08.2022; Blackwell Publishing Ltd
• Subjects: composite sandwich shells; Cylindrical shells; damping property; discrete model; Equations of motion; Free vibration; Hamilton's principle; Parameters; Shear strain; Vibration analysis; vibration characteristics; Vibration damping
• ISSN: 0272-8397; 1548-0569
• DOI: 10.1002/pc.26843

In this article, in order to obtain better vibration characteristics of circular composite sandwich cylindrical shells (CCSCS), the free vibration and damping property of CCSCS has been performed with parameter analysis. First, the equations of motion of CCSCS are deduced by adopting a displacement continuous piece‐wise model based on Hamilton's principle and first order shear theory, in which shear strain and rotary inertias of all layers are considered. Second, the exact Navier method is adopted to obtain the solutions of these vibration equations and is authenticated by comparison with the results of open literatures. Finally, the change rule of free vibration and damping property versus thickness, shear parameter, and some structure parameters ratios are presented graphically, then a series of valuable conclusion are proposed to make CCSCS obtain higher rigidity and damping property. Analytical Models of vibration characteristics