Li Jinan, Yang Yao, Hou Junxue, Wang Xiangping, Zhang Haiyang, Wang Haizhou, Li Hui
School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.
Key Laboratory of Impact Dynamics on Aero Engine, Shenyang 110015, China.
Materials (Basel). 2024 Sep 18;17(18):4576. doi: 10.3390/ma17184576.
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.
本文采用一阶剪切变形理论研究了热环境下具有功能梯度涂层（FGCs）的复合圆锥 - 圆柱壳（CCSs）的振动行为。首先，利用混合原理、复模量法和传递函数方法推导了具有FGCs的CCSs的等效材料参数、基频和共振位移响应。然后，对有涂层和无涂层的CCS结构进行了详细的热振动试验，以评估所提出模型的可靠性，结果表明当前模型能够准确预测具有FGCs的CCSs的热振动行为。最后，研究了关键参数对具有FGCs的CCSs振动特性的影响。结果表明，增加功能梯度指数、涂层厚度和杨氏模量比可以大大提高结构的振动抑制能力。
