Title: Prediction on hydroelastic responses of very large floating structure with the eigenfunction expansion-matching method

Authors: Wan Zhinan; Zhai Gangjun; Cheng Yong

Addresses: CCCC-FHDI Engineering Co., Ltd., Guangzhou, 510230, China ' Deep Sea Engineering Research Centre, Department of Construction Engineering, Dalian University of Technology, Dalian, 116024, China ' School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

Abstract: This paper investigates the hydroelastic responses of a mat-like, rectangular very large floating structure (VLFS) with analytical method. The VLFS is considered as a two-dimensional thick plate and the wave linearity theory is employed. The flow field is divided into three regions and the eigenfunction expansion-matching method is applied in determining the velocity potential of each region, and then the Rayleigh-Ritz method is used to solve the elastic equation of motion. The analytical method is verified by comparing with the published numerical and experimental results. The elastic deformation and wave exciting force of the VLFS are computed and the effects of water depth, wavelength, draft and stiffness on the elastic deformation of the VLFS are further discussed. The deformation increases with the increase of wavelength in general, decreases with the increase of stiffness, increases slightly with the increase of draught, and does not change significantly with the depth of water.

Keywords: very large floating structure; eigenfunction expansion-matching method; Rayleigh-Ritz method; hydroelastic response.

DOI: 10.1504/IJCAT.2020.107432

International Journal of Computer Applications in Technology, 2020 Vol.62 No.4, pp.338 - 347

Received: 02 Dec 2019
Accepted: 17 Dec 2019
Published online: 28 May 2020 *

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