功能梯度石墨烯增强多孔复合材料阶梯圆柱壳的振动特性

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Abstract The vibrational properties of functionally graded graphene platelet reinforced porous composites (FG-GPLRPC) stepped cylindrical shell were investigated in this study. First, the effective material properties of the FG-GPLRPC stepped cylindrical shell are obtained using the Halpin-Tsai micromechanical model as well as the open-cell body theory. Secondly, the energy expressions of the shell structure are derived based on the first-order shear deformation theory and the penalized parameter method. Finally, the Jacobi-Ritz method is used to establish the vibration control equation of the shell structure and to find the dimensionless frequency of the structure, which verifies the validity and correctness of the method. The results show that the mass fraction of graphene, porosity coefficient and boundary spring stiffness value have significant effects on the vibration characteristics, the number of layers has less effect on the vibration characteristics, the dimensional parameters have different effects on the vibration characteristics, and the variation law of the shell frequency decreases and then increases with the circumferential wave number is obtained.

Key words： graphene reinforced porous composites stepped cylindrical shell first-order shear deformation theory Jacobi-Ritz method

Received: 06 June 2023 Published: 15 April 2024

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	Articles by authors
	XU Hongda
	WANG Yu
	XU Ziqiang
	JIA Xiaoyu
	YU Xiaoguang

Cite this article:

XU Hongda,WANG Yu,XU Ziqiang, et al. Vibration characteristics of functionally graded graphene reinforced porous composite stepped cylindrical shell[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(7): 317-326.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I7/317

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