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Experimental and mixed analytical-numerical studies for free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs

Experimental and mixed analytical-numerical studies for free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs
Experimental and mixed analytical-numerical studies for free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs
Free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs are researched by experimental and mixed analytical-numerical techniques. A test sample of the plate is firstly manufactured and an underwater vibration test is conducted with a random white-noise force. Meanwhile, a mixed analytical-numerical method (MA-NM) is proposed, which uses an analytical homogenization for the Z-reinforced core and coupling finite element and boundary element (FE/BE) analyses for the plate. Natural frequencies given by the MA-NM are compared with ones from the detailed FE model. Forced vibration responses from the MA-NM are validated against the experimental data. Good agreements are obtained and the high accuracy of the MA-NM is demonstrated. Parameters influences are then analyzed through the MA-NM. The core material shows a larger effect on natural frequencies than the reinforcement material. Ribs at the orthotropic midlines greatly enhance the bend stiffness of the whole structure, and ribs at the surrounding sides mainly influence boundary conditions. When in-plane coordinates of the external force near the plate center, vibration responses have fewer resonance peaks and lower amplitudes, while the influence of the thickness direction coordinate could be ignored. The fluid loading reduces both natural frequencies and vibration responses.
Z-reinforced sandwich; Steel rib; Vibration analysis; Underwater experiment; Mixed analytical-numerical method
0263-8223
1-13
Zhou, Zhiwei
ef758322-4330-4963-ab58-386baf591e5e
Chen, Meixia
fb70817c-edd8-4b58-9462-d6bdf530a1b0
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
Jia, Wenchao
8f0caca2-71bb-41e9-8893-39db075a0121
Xie, Kun
c5e14e7a-2fc2-4f08-a349-9380f62a06ed
Zhou, Zhiwei
ef758322-4330-4963-ab58-386baf591e5e
Chen, Meixia
fb70817c-edd8-4b58-9462-d6bdf530a1b0
Xiong, Yeping
51be8714-186e-4d2f-8e03-f44c428a4a49
Jia, Wenchao
8f0caca2-71bb-41e9-8893-39db075a0121
Xie, Kun
c5e14e7a-2fc2-4f08-a349-9380f62a06ed

Zhou, Zhiwei, Chen, Meixia, Xiong, Yeping, Jia, Wenchao and Xie, Kun (2021) Experimental and mixed analytical-numerical studies for free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs. Composite Structures, 272 (1), 1-13, [114221]. (doi:10.1016/j.compstruct.2021.114221).

Record type: Article

Abstract

Free and forced vibrations of Z-reinforced sandwich plates stiffened by steel ribs are researched by experimental and mixed analytical-numerical techniques. A test sample of the plate is firstly manufactured and an underwater vibration test is conducted with a random white-noise force. Meanwhile, a mixed analytical-numerical method (MA-NM) is proposed, which uses an analytical homogenization for the Z-reinforced core and coupling finite element and boundary element (FE/BE) analyses for the plate. Natural frequencies given by the MA-NM are compared with ones from the detailed FE model. Forced vibration responses from the MA-NM are validated against the experimental data. Good agreements are obtained and the high accuracy of the MA-NM is demonstrated. Parameters influences are then analyzed through the MA-NM. The core material shows a larger effect on natural frequencies than the reinforcement material. Ribs at the orthotropic midlines greatly enhance the bend stiffness of the whole structure, and ribs at the surrounding sides mainly influence boundary conditions. When in-plane coordinates of the external force near the plate center, vibration responses have fewer resonance peaks and lower amplitudes, while the influence of the thickness direction coordinate could be ignored. The fluid loading reduces both natural frequencies and vibration responses.

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Vibrations Z-reinforced sandwich plates_Composit Str 2021_Zhou_Chen_Xiong etal - Version of Record
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More information

Accepted/In Press date: 1 June 2021
e-pub ahead of print date: 4 June 2021
Keywords: Z-reinforced sandwich; Steel rib; Vibration analysis; Underwater experiment; Mixed analytical-numerical method

Identifiers

Local EPrints ID: 449904
URI: http://eprints.soton.ac.uk/id/eprint/449904
ISSN: 0263-8223
PURE UUID: 722fcdbd-1b3a-4e2b-9343-8db4c3e94efa
ORCID for Yeping Xiong: ORCID iD orcid.org/0000-0002-0135-8464

Catalogue record

Date deposited: 24 Jun 2021 16:31
Last modified: 26 Nov 2021 02:44

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Contributors

Author: Zhiwei Zhou
Author: Meixia Chen
Author: Yeping Xiong ORCID iD
Author: Wenchao Jia
Author: Kun Xie

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