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Ship Structures and Beyond

First held in 1961, and there after every three years, the International Ship and Offshore Structures Congress (ISSC) is one of the most prestigious global forums for information exchange by leading experts undertaking and applying marine structural research. This summer ushered in the 20th ISSC held jointly between Liege, Belgium and Amsterdam, the Netherlands in early September. Dr Adam Sobey and Dr Yikun Wang were invited to attend the congress as observers, representing FSI/SMMI and the University of Southampton.
 

ISSC 2018 opening speech by Prof Mirek Kaminski (Chairman) from TU Deft

The first day of the congress was held in the Palais des Congrès Liège with with a tour of the experimental facilities at the University of Liège in the afternoon and dinner at the Chateau Colonster, before a second day travelling down the river Meuse with an afternoon visit to the test facilities at the Flanders Hydraulic Research Laboratory and the final two days held in Egmond ann Zee, a small village near the sea in Holland.
Specialist Committee V1 – Accidental Limit State presenting during a boat trip

Unique to ISSC, the four-day event was composed of presentations and formal discussions given by eight technical and eight specialist committees. Each committee is formed of a number of multi-national experts from a wide range of marine structure related disciplines from Ultimate Strength to Loads and Environment. Committees have worked over the last three years prior to the congress to generate reports reviewing recent research outcomes, as well as identifying future research areas requiring attention. During the congress, each committee chair has to summarise the report, which is followed by comments given by the official discusser. The chair is required to present responses on behalf of the committee. All comments and responses are captured as part of the ISSC 2018 publications.
Wave basin modelling tidal flows at a visit to the Flanders Maritime Laboratory

As the first time attending the congress, both Adam and Yikun appreciated the comprehensive reports written by each committee, participated in the professional discussions on relevant research topics and enjoyed networking with experts from universities, research institutes, navy/defence and classification societies. For the next three-year period, Southampton is well represented with Adam on Committee IV.2 – Design Methods, Yikun on Committee III.1 – Ultimate Strength and Dr Blair Thornton on Committee V.8 – Subsea Technology. We look forward to hearing their committee experience in Vancouver 2021!
If you are interested in reading the congress proceedings, please follow this link.

Autonomous voyages

University of Southampton C-Cat3

In January 2018, The Maritime Robotics Laboratory took delivery of the C-Cat 3 – a 3m autonomous catamaran from ASV Global. The vessel is the first of a new class of vessels for ASV and is small enough to easily transport and mobilise but is able to carry a significant range of payloads.
The vessel will be used both for scientific and engineering research in the development of autonomous systems. The investment was funded by an EPSRC RAS Capital Award.
Powerboat handling training in the Solent in preparation for operating ccat3 autonomously

As part of the vessel delivery, Dr Blair Thornton, Dr Nick Townsend and Dr Jon Downes undertook a C-Cat 3 specific ASV Remote Operator Course with ASV Global. This involved undertaking the RYA powerboat level 2 handling course (including a very wet passage from Porchester to Cowes and back) and 3 days operations with the C-Cat3 from a support vessel. All involved were very grateful for the efforts of ASV Global to run this course which provided good insights into the workings of the ASView® system and experience of operating this class of vessel.
See also: https://www.asvglobal.com/university-southampton-takes-delivery-asv-global-c-cat-3-autonomous-vessel/ 
 

How to study the biodiversity of the seabed

Jin Wei Lim, a Leverhulme Trust PhD student in the Faculty of Engineering and the Environment at the University of Southampton has been awarded first place in the OCEANS’18 MTS/IEEE conference help at the Kobe Convention Center in Japan. This year’s competition had more than 100 entries from around the world. The best fifteen entries were chosen to present their posters to a panel of 11 judges, with the best three posters being awarded prizes at a ceremony held during the conference gala dinner.

The winning poster, entitled ‘Automated Interpretation of Seafloor Visual Maps Obtained using Underwater Robots’ demonstrates the feasibility of using Convolutional Neural Networks (CNNs) to automatically interpret large visual maps of the seafloor in volcanically active regions. These regions are often densely populated by deep-sea biological communities and the ability to efficiently document the diversity and distribution of different species over large spatial scales is critical for monitoring the environmental in the context of deep-sea mining. The study shows how the manual process of identifying and annotating individual animals can be automated given a sufficient number of labelled examples. The study further demonstrates how the classification uncertainty of the automated algorithm relates to the number of training examples used for different species of animal, giving important insights regarding how human efforts can be optimized and best leveraged by machines.

Jin Wei commented “This conference has been an eye opening experience. I am really honoured to be able to share my work on this prestigious program, and meet many amazing industry professionals and researchers from all around the globe.”
The research was carried out by Jin Wei as part of his undergraduate final year individual project with the Fluid Structure Interactions group. Jin Wei is currently looking at characterising uncertainty in automated data processing techniques used in ocean research under the supervision of Dr Blair Thornton, Prof Adam Prugel-Bennet and Prof Damon Teagle.

2018 Open days coming soon

The Ship science team will be welcoming visitors this summer and autumn as part of the University of Southampton’s  Open Days.

Talks will give opportunities to learn more about the maritime sector and the exciting careers possible with a degree in Ship Science as well as demonstrations in our impressive 138 m long , 6 m wide and 3.5 m long wave and towing tank.
Maritime is a rapidly growing sector where there is significant skills shortage. A recent article by the chair of Maritime UKOcean economy offers UK a trillion pound opportunity in undiscovered gold and precious metals highlights what are seen as the many opportunities enabled by the 4th industrial revolution enabled by digital technology. Ship scientists and maritime engineers are at the heart of the application of the new developments in technology ensuring that these can be applied safely and in an environmentally sensitive way.
 

Fleur in Action – autonomous surface vessel that crawls across the oceans using wave energy  gathering data

Our staff and students will be on hand to explain and answer any questions you might have.
 
 
 
 

Maritime Masters

MaritimeUK has recently highlighted the on-going collaborations between University and Industry to enhance the UK’s maritime sector capabilities.
Current Maritime Engineering MSc student Hongseok Bae discusses his research project into the use of AIS data to evaluate ship operational efficiency.  The Automatic Identification System (AIS) is fitted on board all large ships and provides a continual update as to a particular vessel’s position, speed and other operational data via radio connections to land or satellite receivers. Models can be built to estimate for a given ship speed and type what emissions will be generated.
The University of Southampton’s expertise in marine and maritime disciplines is nurtured through the Southampton Marine and Maritime Institute (SMMI). SMMI is a community of academics whose interests and research are linked to the natural marine environment and the human intervened maritime realms. By working across the traditional disciplinary divides, we can better address some of today’s global marine & maritime challenges.
The SMMI constitutes world class, authoritative, independent expertise, spanning both the marine and maritime sectors. We foster new research collaborations, educate the next generation of maritime leaders, and generate knowledge and intelligence for businesses of all sizes, government at all scales and organisations of all kinds. SMMI staff and students, by themselves and in partnership with industry, create new technologies and innovations to stimulate economic growth and improve quality of life and the environment.
 

Summer Study in Ship Science

We are fortunate to offer three research internships based in the fluid structure interactions group. These are intended primarily for ship science students just finishing their 3rd year and provide an eight week research experience.

Professor Dominic Hudson is looking for someone to work Prediction of ship power using machine learning
and
Dr Joe Banks has two positions related to his work on the characterisation of the fluid structure interaction of ship propellers
Research Intern into propeller performance
and as part of the on-going work of teh performance sports engineering lab investigating performance of elite swimmers
Research Intern into Swimming Performance – 
If you are interested please contact Dominic or Joe directly.
We also have some PhD opportunities in swimming for students who qualify as suitable for EPSRC.
 

Experimental testing of sailing hydrofoils

Ben Pickering, a 3rd Year Ship Science student, has been undertaking experimental towing tank testing of a model scale sailing hydrofoil.  The aim is to provide validation data for computational predictions of vertical lift, drag and sideforce.

Ben developed a system to measure the vertical forces and used the existing dynamometry to acquire the drag and sideforce.  The rig allowed for various angles of yaw, rake and cant of the foil.  Below is a video of a single run in the towing tank.

There are limitations to the scale of hydrofoil that can be tested due to the large rolling moments produced compared to normal ship resistance testing.  The next stage will be to investigate foiling specific dynamometry for use at larger scales and the measurement of deformations visible in the video above.

High performance computing solves Ship Science challenges

The fifth generation of the University of Southampton’s supercomputers Iridis 5 has come on line. It has 20,000-cores and has a peak performance of 1.3 Petaflops. A ‘flop’ is floatng point operations per second such as adding two real numbers in a second and Peta is 1 quadrillion eg 10 to the power 15 .

Wolfson Unit CFD around sailing catamaran

The 20,000-core machine was designed and built by high performance computing (HPC) integrator OCF using ThinkSystem SD530 servers from Lenovo. It has already emerged as one of the most powerful systems in the world, entering the Top500 supercomputer list in November,at number 251.

One of the key users over many years is our own Wolfson Unit for Marine Technology and Industrial Aerodynamics(WUMTIA)  who provide a variety of Computational Fluid Dynamics(CFD) services to industry. Dr Sandy Wright, principal research engineer, Wolfson Unit at the University of Southampton comments in an OCF press release. “We have a worldwide customer base and have worked with the British Cycling Team for the last three Olympic games, as well as working with teams involved in the America’s Cup yacht race. In the past 10 years, Computational Fluid Dynamics (CFD) has become a perfectly valid commercial activity, reducing the need for physical experimentation. CFD gives as good an answer as the wind tunnel, without the need to build models, so you can speed up research whilst reducing costs. Iridis 5 will enable the Wolfson Unit to get more accurate results, whilst looking at more parameters and asking more questions of computational models.”
Scale up of standard CFD testcase KVLCC on Iridis 4 upto 2048 cores

PhD students in FSI are alo important users of the Iridis computers. One example is Dr James Hawkes who recently completed his PhD in collboration with Dr Guilherme Vaz of the Refresco team at MARIN on ‘Chaotic methods for the strong scalability of CFD‘. His work investigated how best to design CFD codes of the future to work across thousands of cores.
Ducted thruster

Wind tunnel tests on deep water underwater autonomous glider

As part of the BRIDGES EUH2020 (http://www.bridges-h2020.eu/). research programme the hydrodynamic performance of the external shape was successfully validaterd in the large  R.J.Mitchell wind tunnel at the University of Southampton.  The glider is designed to carry out long duration autonomous scientific missions down to depths of 3000m. Current underwater gliders are typically limited in depth (~150 m). This is one of the funded projects underway in the maritime robotics laboratory.

Underwater glider suspended from overhead strut with an internal dynamometer measuring forces down to < 1N

Dr Artur Lidtke , Research Fellow in the Maritime Robotics Lab at the FSI Group, carrie dout the tests over a one week period. Thanks to the size of the facility, hydrodynamic performance of the AUV could be measured at full-scale Reynolds numbers, allowing detailed quantification of drag augments associated with different vehicle configurations. The information will help to validate the design, which has been devised based on fluid dynamic simulations (CFD),  allow better estimation of mission endurance, and lead to an improved understanding of performance of such AUVs in the future.
See also: https://twitter.com/BRIDGESh2020/status/956851894449827840