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Publishing Language: Chinese

Reinforcement and homogenization of non-orthogonality stiffening on dynamic stiffness of stiffened plates

Dong TANG1,2( ), Maohui RAN1, Zitong MA1, Hao WANG1, Feng LUO1,2
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210024, China
Nantong Ocean and Coastal Engineering Research Institute, Hohai University, Nantong 226004, China
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Abstract

Objective

In order to design and optimize the typical orthogonally stiffened plates commonly used in naval architecture and ocean engineering, it is necessary to investigate the influence of different stiffener configurations on the intrinsic dynamic characteristics of orthogonally stiffened plates.

Methods

The natural frequencies and mode shapes of orthogonally, obliquely and curvilinearly stiffened plates are calculated using the finite element method under clamped boundary conditions. Comparative and analogy analyses of the intrinsic dynamic characteristics of the three types of stiffened plates reveals the influence of stiffener configurations on their dynamic coupling behavior and intrinsic dynamic characteristics.

Results

The numerical results show that the natural frequency of obliquely stiffened plates can be increased by 9% compared to that of orthogonally stiffened plates, while the stiffness distributions of obliquely stiffened plates and curvilinearly stiffened plates are more homogeneous than that of orthogonally stiffened plates, and the dynamic stiffness homogenization effect of curvilinearly stiffened plates is more significant. In the frequency range below 900 Hz, the stronger the reinforcement, the greater the influence of the stiffener configuration on the dynamic characteristics of stiffened plates.

Conclusion

The results of this study can provide valuable references for the design of structures composed of orthogonally stiffened plates.

Keywords

stiffened platesdynamic stiffnessnatural frequencymode shapefinite element methodstiffener configurations
CLC number: U663.2；TB532；O342 Document code: A

References

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Chinese Journal of Ship Research
Volume 19 Issue 5,
October 2024
Pages 148-157
DOI: 10.19693/j.issn.1673-3185.03402

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Cite this article:
TANG D, RAN M, MA Z, et al. Reinforcement and homogenization of non-orthogonality stiffening on dynamic stiffness of stiffened plates. Chinese Journal of Ship Research, 2024, 19(5): 148-157. https://doi.org/10.19693/j.issn.1673-3185.03402

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Received: 07 June 2023
Revised: 20 July 2023
Published: 10 November 2023
© 2024 Chinese Journal of Ship Research.