Modelling methods for complex interconnection of very large floating structures based on discrete-module-beam hydroelasticity theory

CHEN Yongqiang; ZHANG Yu; ZHANG Xiantao

doi:10.19693/j.issn.1673-3185.02230

Volume 17 Issue 1

Mar. 2022

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Article Navigation > Chinese Journal of Ship Research > 2022 > 17(1): 117-125

CHEN Y Q, ZHANG Y, ZHANG X T. Modelling methods for complex interconnection of very large floating structures based on discrete-module-beam hydroelasticity theory[J]. Chinese Journal of Ship Research, 2022, 17(1): 117–125, 146 doi: 10.19693/j.issn.1673-3185.02230

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Modelling methods for complex interconnection of very large floating structures based on discrete-module-beam hydroelasticity theory

doi: 10.19693/j.issn.1673-3185.02230

CHEN Yongqiang^1
,,
ZHANG Yu^1
,,
ZHANG Xiantao^{1, 2
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,}

1.
State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2.
SJTU Yazhou Bay Institute of Deepsea SCI-TECH, Sanya 572024, China

Received Date: 2020-12-18
Rev Recd Date: 2021-03-11

Available Online: 2022-02-23

Publish Date: 2022-03-02

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective The aim of this paper is to proposes new methods for modelling a very large floating structure (VLFS) with complex connections in the framework of the discrete-module-beam (DMB) hydroelasticity theory, and makes a comparison with the existing methods. Method First, a brief introduction of the DMB-based hydroelasticity analysis method is given, followed by procedures for calculating the dynamic response of VLFS under regular waves. A structural stiffness matrix is then defined to model connections with complex forms in VLFS. Corrections are made to the relationship between the forces of two lumped masses and their displacements, obtaining a revised structural stiffness matrix and excitation force matrix, and solving the new hydroelastic equations. Finally, the varying trends of the structural dynamic response of VLFS against different bending stiffness by four methods are explored, and the corresponding reasons for their response differences are analyzed. Results The results show that all four methods are capable of precisely predicting the hydroelastic response of VLFS with complex forms of interconnection. Conclusion The methods in this paper extend the application of the DMB-based method in predicting the dynamic response of non-continuous VLFS, such as multi-hinged VLFS or VLFS with fracture places.
- very large floating structure,
- interconnected modules,
- discrete-module,
- beam element,
- hydroelasticity

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References(13)

References

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