A Zonal CFD Approach for Fully Nonlinear Simulations of Two Vessels in Launch and Recovery Operations

用于两艘船舶发射和回收操作完全非线性仿真的分区 CFD 方法

• 批准号: EP/N008847/1
• 负责人: Deborah Greaves
• 金额: $ 56.83万
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN008847%2F1
• 关键词: Zonal; CFD; Approach; Fully; Nonlinear

Launch and recovery of small vehicles from a large vessel is a common operation in maritime sectors, such as launching and recovering unmanned underwater vehicles from a patrol of research vessel or launching and recovering lifeboats from offshore platforms or ships. Such operations are often performed in harsh sea conditions. The recent User Inspired Academic Challenge Workshop on Maritime Launch and Recovery, held in July 2014 and coordinated by BAE systems, identified various challenges associated with safe launch and recovery of off-board, surface and sub-surface assets from vessels while underway in severe sea conditions. One of them is the lack of an accurate and efficient modelling tool for predicting the hydrodynamic loads on and the motion of two floating bodies, such as vessels of different size which may be coupled by a non-rigid link, in close proximity in harsh seas. Such a tool may be employed to minimise the risk of collisions and unacceptable motions, and to facilitate early testing of new concepts and systems. It may also be used to estimate hydrodynamic loads during the deployment of a smaller vessel (for example, a lifeboat) and during recovery of a smaller vessel from the deck of a larger vessel. The difficulties associated with development of such tools lie in the following aspects: (1) the water waves in harsh sea states have to be simulated; (2) the motion of the small vehicle and change in its wetted surface during launch or recovery can be very large, possibly moving from totally dry in air to becoming entirely submerged; (3) the viscous effects may play an important role and cannot be ignored, and will affect the coupling between ocean waves and motion of the vehicles. Existing methods and tools available to the industry cannot deal with all of these issues together and typically require very high computational resources. This project will develop an accurate and efficient numerical model that can be applied routinely for the analysis of the motion and loadings of two bodies in close proximity with or without physical connection in high sea-states, which of course can be employed to analyse the launch and recovery process of a small vehicle from a large vessel and to calculate the hydrodynamics during the process. This will be achieved building upon the recent developed numerical methods and computer codes by the project partners and also the success of the past and ongoing collaborative work between them. In addition, the project will involve several industrial partners to ensure the delivery of the project and to promote impact.

从大型船只发射和恢复小型车辆是海上行业的常见行动，例如从研究船巡逻队发射和恢复无人管理的水下车辆，或从海上平台或船只上发射和恢复救生艇。这种操作通常在恶劣的海洋条件下进行。最近的用户启发了2014年7月举行并由BAE Systems协调的有关海上发射和恢复的学术挑战研讨会，确定了与在严重海上条件下进行的船只，表面和地下资产的安全发射以及从船上的板，表面和地下资产相关的各种挑战。其中之一是缺乏一种准确有效的建模工具来预测两个浮动物体的流体动力载荷和运动，例如不同尺寸的容器，这些容器可能与非韧性连接可能耦合，在恶劣的海洋中近距离接近。可以使用这种工具来最大程度地减少碰撞和不可接受的动议的风险，并促进对新概念和系统的早期测试。在部署较小的容器（例如救生艇）和从较大容器的甲板中恢复较小的容器期间，它也可用于估计流体动力载荷。与此类工具的开发相关的困难在于以下方面：（1）必须模拟苛刻的海洋国家的水波； （2）在发射或恢复过程中，小型车辆的运动和湿润的表面变化可能非常大，可能从空气中完全干燥到完全淹没； （3）粘性效应可能起着重要作用，不能忽略，并且会影响海浪之间的耦合和车辆的运动之间的耦合。现有的行业可用方法和工具不能一起处理所有这些问题，通常需要很高的计算资源。该项目将开发出一个准确有效的数值模型，可以通常应用，分析两个物体的运动和载荷，在高海态中有或没有物理连接的两个物体的运动和负载，当然可以分析从大容器中的小型车辆的发射和恢复过程，并在此过程中计算流体动力学。这将是基于项目合作伙伴以及过去的成功和他们之间正在进行的协作工作的最新数值方法和计算机代码的基础。此外，该项目将涉及几个工业合作伙伴，以确保项目的交付并促进影响。

项目成果

Investigation of wave-driven hydroelastic interactions using numerical and physical modelling approaches

• DOI: 10.1016/j.apor.2022.103363
• 发表时间: 2022-12
• 期刊: Applied Ocean Research
• 影响因子: 4.3
• 作者: S. Brown;N. Xie;M. Hann;D. Greaves

Investigations of Offshore breaking Wave Impacts on a large offshore Structure

• DOI: 10.1016/j.jfluidstructs.2017.08.005
• 发表时间: 2017-11
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: Zhengjun Hu;T. Mai;D. Greaves;A. Raby

Numerical wave tank study of extreme waves and wave-structure interaction using OpenFoam®

• DOI: 10.1016/j.oceaneng.2016.09.017
• 发表时间: 2016-11
• 期刊: Ocean Engineering
• 影响因子: 5
• 作者: Zhengjun Hu;D. Greaves;A. Raby

Self-Adaptive Wave Absorbing Technique for Nonlinear Shallow Water Waves

非线性浅水波浪自适应吸波技术

• DOI: 10.1115/omae2016-54475
• 发表时间: 2016
• 作者: Yan S

Numerical investigation of air enclosed wave impacts in a depressurised tank

• DOI: 10.1016/j.oceaneng.2016.06.044
• 发表时间: 2016-09
• 期刊: Ocean Engineering
• 影响因子: 5
• 作者: Zhihua Ma;D. Causon;L. Qian;C. Mingham;P. M. Ferrer