Journal Article

Vibrational Analysis of Composite Conical-Cylindrical Shells with Functionally Graded Coatings in Thermal Environments

Hou, Junxue, Wang, Xiangping, Zhang, Haiyang, Wang, Haizhou, Li, Jinan, Li, Hui, Yang, Yao

2024

Overview

This article studies the vibrational behavior of composite conical-cylindrical shells (CCSs) with functionally graded coatings (FGCs) in thermal environments using the first-order shear deformation theory. Firstly, the equivalent material parameters, fundamental frequency, and resonant displacement responses of the CCSs with FGCs are derived using the mixture principle, complex modulus method, and transfer function approach. Then, detailed thermal vibration tests are performed on CCS structures with and without coatings to assess the reliability of the proposed model, revealing that the current model accurately forecasts the thermal vibration behavior of the CCSs with FGCs. Finally, the effect of key parameters on the vibrational properties of the CCSs with FGCs is investigated. The results demonstrate that increasing the functionally graded index, coating thickness, and Young’s modulus ratio can greatly enhance the vibration suppression capability of the structure.

• Publisher: MDPI AG,MDPI
• Subject: Coating effects / Composite materials / Conical shells / Control algorithms / Cylindrical shells / Deformation / Functionally gradient materials / Investigations / Mathematical models / Modulus of elasticity / Parameters / Random vibration / Resonant frequencies / Shear deformation / Structural reliability / Temperature / Thermal environments / Thickness / Transfer functions / Vibration control / Vibration tests / Viscoelasticity