Hydroelastic Analysis of Pontoon-Type Very Large Floating Structures with Multiple Perforated Barrier Attachments

作     者：Nguyen, H. P. Nguyen-Thoi, T. 

作者机构：Lang Univ Inst Computat Sci & Artificial Intelligence Lab Computat Civil Engn Ho Chi Minh City Vietnam Lang Univ Fac Civil Engn Sch Technol Ho Chi Minh City Vietnam Lang Univ Inst Computat Sci & Artificial Intelligence Lab Appl & Ind Math Ho Chi Minh City Vietnam Lang Univ Fac Mech Elect & Comp Engn Sch Technol Ho Chi Minh City Vietnam 

出 版 物：《INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS》 (Int. J. Struct. Stab. Dyn.)

年 卷 期：2024年第0期

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 0814[工学-土木工程] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Very Large Floating Structure (VLFS) mitigation method perforated barrier hydroelastic analysis quadratic pressure drop condition dual boundary element method 

摘      要：This paper presents a hydroelastic analysis of a pontoon-type Very Large Floating Structure (VLFS) with multiple barriers of varying porosities. The Mindlin plate theory is applied to model the VLFS, while the linear potential wave theory is used to model fluid motions. For interactions between the fluid and impermeable solid surfaces, a boundary condition equating normal fluid and structural velocities is imposed. For fluid interactions with perforated barriers, an empirical model is adopted, where the pressure of fluid passing through the barriers is assumed to drop in a quadratic relationship with the fluid velocity. The mathematical model is solved using an iterative numerical framework based on the finite element method and dual boundary element method. Numerical examples of VLFSs with single and multiple barriers of different porosities are presented. The numerical results indicate that the number and porosity of barrier attachments can be optimized to minimize the hydroelastic responses of the VLFS under specific wave conditions. A combination of a perforated barrier placed in front of an impermeable barrier demonstrates good performance in mitigating the VLFS s hydroelastic responses, with reasonable horizontal forces on the mooring system as compared to other possible combinations of barrier porosities.