澳大利亚海事学院Shuhong Chai博士学术报告

发布日期：2013-12-12

报告题目

Numerical Investigation into Marine Growth Impact on Hydrodynamic Loads Acting on Mid Water Arch

时间

2013年12月18 日（星期三），下午14:30-16:00

地点

上海交大闵行校区海洋深水池五楼会议室

报告人

Dr. Shuhong Chai, Senior Lecturer, Ocean Engineering Course Coordinator, National Centre for Maritime Engineering & Hydrodynamics, Australian Maritime College.

 报告内容简介： 
The presence of marine growth modifies hydrodynamic properties of subsea structures which if not properly assessed could impact these structures’ integrity but also restricting their serviceability. Commonly‐ used  design practice codes do not contain any specific guidelines or recommendations to account for the effects of marine fouling on complex subsea structures. In the numerical investigation described in this presentation, the impacts of marine growth accumulation, current velocities and flow directions on the hydrodynamic drag of a mid‐water arch (MWA) structure were studied by using computational fluid dynamics. Two different marine fouling severities as well as the structure in a no marine growth configuration were simulated, representing scenarios based on experimental tests conducted in the Circulation Water Channel at Australian Maritime College. 3D scanning method was applied to characterise the roughness of the tested artificial marine growth, which has been employed in the numerical simulations to identify marine fouling impact on the structure. Numerical results obtained show that the drag forces increase when marine growth roughness is applied. Physical model testing complements this, illustrating an increase in drag under the condition where artificial marine growth was employed. Flow features in the vicinity of the MWA have been captured. From which, it was found that vortices preferentially developed when the structure is under normal and axial flow direction as shown in Figure 1. Particular attention is paid on the scenario when the structure is experiencing normal direction flow with a velocity of 1m/s, which represents realistic MWA operating condition. 5% increment of drag coefficient is found for both simulated marine growth severities. 
报告人简介： 
Dr Chai has 20 years’ experience in performance evaluation of ship and offshore structures using experimental and numerical modeling. She has over 5 years’ industry-consulting experience with one of the world’s leading model testing companies Oceanic Consulting Corporation, Canada. In 1992, Dr Chai obtained a MEng in marine hydrodynamics from Dalian University of Technology, China. During the next 8 years she lectured undergraduate and postgraduate student s and managed the 200 m long ship model towing tank at DUT. In 2000, she moved to the UK to study a doctoral degree. After joining Oceanic Consulting Corporation in 2003, she was engaged in various research and consulting projects of marine hydrodynamic and offshore engineering using physical model testing and numerical prediction. Dr Chai is the course coordinator of ocean engineering program at Australian Maritime College, and also a member of Learning and Teaching Committee. She was recently appointed as an expert to the Special Committee V.8 Flexible Pipeline and Riser, the International Ship and Offshore Structures Congress (ISSC2015). Dr Chai is also a member of Women in Engineering Committee of Engineers Australia at Tasmania Division since 2011. Her research interests include Hydrodynamic Responses of Floating Offshore Structures, Fluid-Structure Interaction, Dynamics of Pipelines, Mooring System Design, Vortex-Induce Vibration Analysis for Deep Water Marine Risers, Wave Mechanics, Renewable Energy, Wave Energy Converting, Coastal Engineering. 
欢迎大家参加！ 
联系人：付世晓 特别研究员
Email: shixiao.fu@sjtu.edu.cn