大吨位沉船打捞多体系统耦合水动力特性研究

双驳船抬吊法是大吨位沉船打捞中主要采用方法之一。两艘驳船、难船构成的系统具有尺度大、间距小等特点,波浪环境形成复杂水动力耦合效应，基于势流理论，增加人工阻尼修正其粘性影响，利用AQWA软件开展单驳船、两驳船约束其一、两驳船耦合三种状态多体系统水动力数值预报研究，重点分析不同状态下驳船运动响应及波浪载荷，探讨了驳船约束模式、浪向角及周期对驳船水动力影响规律，探明了浪向角与周期对驳船耦合水动力及运动响应不利干扰，对指导沉船打捞多体系统的空间布局与作业海况具有重要意义。

Numerical calculation and analysis of multi-body coupled hydrodynamics for large tonnage shipwreck salvage

The double barge lifting method is one of the main methods used in the fishing of large tonnage shipwrecks. The system consisting of two barges and difficult ships has the characteristics of large scale and small spacing. The wave environment forms a complex hydrodynamic coupling effect. Based on the potential flow theory and AQWA software, the artificial damping is added to correct the viscous effect, and the single barge and the two barges are constrained. The numerical simulation of hydrodynamics of three state multi-body systems coupled with two barges is carried out. The barge motion response and wave load are analyzed under different conditions. The barge constraint mode, wave angle and cycle influence on the barge hydrodynamics are discussed. The angle and period adversely interfere with the coupled hydrodynamics and motion response of the barge, which is of great significance for guiding the spatial layout and working sea conditions of the multi-body system for shipwreck salvage.