开孔硬涂层薄壁圆柱壳复合结构的半解析建模及振动特性分析

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Abstract In order to solve the circular perforation problem of the composite thin-walled hard-coating cylindrical shell, a parameterized circumferential domain decomposition method is proposed. On this basis, a semi-analytical model of free vibration of the perforated thin-walled hard-coating cylindrical shell is established based on the Rayleigh-Ritz method. Taking the perforated thin-walled cylindrical shell coated with NiCoCrAlY+YSZ hard coating material as an example, the rationality of the semi-analytical model is verified by comparing the analytical and finite element results. Meanwhile, the effects of the circumferential perforation number, the axial perforation position, the perforation radius, and the coating elastic modulus on the vibration characteristics of the perforated hard-coating thin-walled cylindrical shell are discussed. The results show that the natural frequencies of the composite structure decrease with the increase of the circumferential perforation number, and will increase abruptly when the perforation number is equal to the circumferential half-wave number or its multiple. As the elastic modulus of the hard coating increases, the natural frequencies of the shell continue to increase. With the increase of the axial perforation position, the natural frequencies gradually decrease, and the decrease amplitudes will greatly increase when the perforation number is equal to the circumferential half-wave number or its multiple. Moreover, the natural frequencies decrease with the increase of the perforation radius on the whole, but the impact pattern will be opposite when the perforation number is equal to the circumferential half-wave number or its multiple.

Key words： Hard-coating cylindrical shell Circular perforation Free vibration Semi-analytical

Received: 02 August 2023 Published: 15 June 2024

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	WEI Dezheng
	YANG Jian
	ZHANG Yue

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WEI Dezheng,YANG Jian,ZHANG Yue. Semi-analytical modeling and vibration characteristics analysis of perforated hard coated thin-walled cylindrical shell composite structure[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(11): 58-65.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I11/58

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