Our FSI seminar series continues with Dr Melek Ertogan from Istanbul Technical University on Thursday 3rd March from 12:00-13:00
Optimal trim control of high speed crafts in calm sea is being studied in the most recent project. The purpose of the automatic trim control is to improve fuel efficiency, safety and comfort of passengers in a vessel. Trim tabs, interceptors, and sterndrive engines can be used to control the trim of a high speed craft.
The trim tabs and the interceptors were mounted on a craft Volcano71, in length 10.86m, for the real-time applications. The sterndrive engines of a Volcano71 have 2×380 HP and it reaches maximum of 40 knots. The pulse width modulation (PWM) drivers were provided for the interceptor, the trim tabs and the sterndrive systems of the gasoline engines can be manually trimmed. By the end of this project, they will be automatically trimmed by employing the mechatronic setup and an algorithm.
The energy saving systems were operated manually in calm sea for system identification purposes and observing maximum effects. After finalizing the simulation studies of the optimal trim control on the system identification model, the investigations of full scale trials will be realized.  Performance of the automatic trim control for a high speed craft can be evaluated with a GPS-aided inertial measurement unit (IMU) at the same motor power while a trim tab, an interceptor, and/or sterndrive system are active and off. It is aimed that the optimal trim control provides up to 30% energy saving.
 
Biography
Dr Melek Ertogan received B.Sc. degree from the Naval Architecture and Marine Engineering Department, M.Sc. degree from the Naval Architecture Department, and Ph.D. degree from the Mechanical Engineering Department from Istanbul Technical University, Istanbul, Turkey, in 1998, 2003, and 2012, respectively.
Previously, she was a Naval Architecture and Marine Engineer in the industry. She was then a Research Assistant, in the Naval Architecture and Marine Engineering Department, Istanbul Technical University, Istanbul, Turkey, from 2000 to 2004. Since 2006, she has been a Lecturer at the Marine Engineering Department, Istanbul Technical University. Her main research interests include ship automation and control, marine mechatronics, and intelligent systems.

Since 2001 until recently FSI/ship Science hosted week long Marine Technology Experience courses each July. These were typically for 90-100 Year 9 students, lasted 4 days, involved a combination of hands-on activities, visits and inspirational talks.
This year the Smallpeice Trust will be celebrating its 50th anniversary and to celebrate this landmark, they are trying to find 50 former students to feature in a 50th anniversary book. If this applies to you or someone you know please get in touch – see details in pdf below
SMALLPEICE TRUST 50 YEARS 50 STORIES
 
 

Our seminar today at 12:00-13:00 in B176/2013 is to be given by John Haynes from RIB & High Speed Craft, Shock Mitigation
Abstract:
Hybrid technology is being utilised by many transport sectors and industries around the world. The marine industry is now recognising the potential of utilising hybrid power and innovative propulsion systems for vessels in the sub IMO / sub 24 metre professional sector.
The Hour Of Power concept enables vessels to run in and out of port for an hour on electric with battery power – then carry out their open sea work on diesel power. The aim of this innovative hybrid solution is to enhance conventional power and propulsion systems. Vessels can reduce emissions and improve fuel consumption whilst extending engine maintenance periods and engine life. The Hour Of Power focuses on viable hybrid solutions linked to vessel work cycles and engine duty cycles. For commercial and professional organisations the concept of running vessels with zero emissions at up to 10 knots for one hour will shape decisions that lead to improvements of in-service systems and procurement of next generation vessels. The overall objective is fuel saving, reduced emissions, additional redundancy and improved efficiency by all means.
Certain maritime sectors are potentially well suited to hybrid diesel / electric systems. These include ferries, harbour tugs, pilot boats that have relatively consistent duty cycles. The Hour Of Power concept lends itself to Wind Farm Service Vessels (WFSV) operating in the ongoing wind farm maintenance phase. For military applications hybrid systems, including battery / electric with diesel, are relevant to patrol, interception, loitering and autonomous vessel duty cycles. As Hybrid technology is generally scalable, proving in the sub 24 metre sector will enable scaling to larger vessels. An example is WFSV applications scaling to offshore supply and patrol vessels.
Biography
HYBRID: Organiser of conferences including: Hybrid Marine Power & Propulsion (2015) / Next Generation Marine Power & Propulsion (2016). December 2015 presented to high level DNV-GL oil & gas industry group in New Orleans on ‘Hybrid Opportunities for Workboats’. January 2016 presented to Superyacht Forum on ‘Hybrid Opportunities for Superyachts’.
Associate Fellow of The Nautical Institute, Commercial Yachtmaster Ocean, Advanced Powerboat Instructor. Subject matter expertise includes 30 years professional sector training / consultancy / product development – focussed on the sub IMO / sub 24m sector. Chairman of conferences for RINA and IQPC. Specialist articles on future requirements / new technology for international publications including: Ship & Boat International (RINA), Maritime Pilot Journal, Seaways, Maritime Reporter, Marine Link, Marine News, Maritime Journal, Powerboat & RIB, Yachting Matters (Superyacht), Defence Management Journal, Defence IQ. Founder of the RIB and High Speed Craft Directory www.ribandhsc.com

Our next seminar is on Feb 11th 2016, 12:00-13:00  in B176/2013. All are welcome to attend.
Dr.Ioannis K. Chatjigeorgiou from National Technical University of Athens.
 
Hydrodynamic slamming is the phenomenon that is induced by the violent collision of a volume of liquid with a structure. It is violent because of the large velocities (either of the liquid or the structure) which are developed at the time of the impact. The duration is short but the loads exerted on the impacted structure are huge. Typical examples which are of great interest for marine applications are, the sudden entry of ship sections in an otherwise calm free-surface and the breaking wave (overturning, plunging-type waves) impact on structures. Violent hydrodynamic slamming has other important applications as well, such as sloshing of liquids in enclosed compartments.
Indeed the phenomenon under consideration is literarily unexplored and many aspects of it ill-understood. 3D solutions are scarce in the literature and when they exist, they concern simple geometries. Aside from the difficulties associated with the formulation of the breaking waves at the time of the impact (shape, velocity, existence of cavity, possible aeration), 3D slamming problems involve more challenges which arise from the fact that the actual impacted area is one of the problem’s unknowns.
The lecture will address some of the issues associated with the hydrodynamic slamming due to the wave impact on otherwise still structural components, focusing on the proper formulation of the problem and the employment of robust mathematical methodologies for the solution.
Biography
Dr.-Eng. Ioannis K. Chatjigeorgiou is Associate Professor in the School of Naval Architecture and Marine Engineering of the National Technical University of Athens. He is currently Professor (Marie Curie Research Fellow) in the School of Mathematics of the University of East Anglia, Norwich, UK. In the past he has been a visiting professor in Ecole Centrale Marseille, France and NTUN, Trondheim, Norway. He has more than 20 years experience in teaching and research, while he has participated in many research projects. Aside from hydrodynamic slamming, his has worked on issues related with linear and nonlinear hydrodynamics, hydroelasticity, wave resistance problems, interactions of structures with waves-current, environmental loading and response of floating structures, cable and slender structures dynamics, dynamics of pipes (risers) with axial flow, numerical methods in line dynamics, design and analysis of mooring systems, hydromechanics analysis of moored floating structures.