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Nautical Institute book

The UKC chapter in Navigation Accidents and their Causes was written by Dr Tim Gourlay. It analyzes case studies of ship groundings due to squat and/or wave-induced motions, and outlines the state of the art in UKC prediction and measurement.

Intended to be on the bridge of every ship, it is available in hardcopy from The Nautical Institute.

PIANC De Paepe - Willems award

This article, with PhD student Scott Ha, won 3rd prize in the PIANC De Paepe - Willems awards.

Bow and stern sinkage coefficients for cargo ships in shallow open water

PreSquat blind validation workshop

The methods in Perth Hydro's "SlenderFlow" software were tested against model tests of a 372 m containership in a symmetric and asymmetric channel. The tests were done on 9-metre models at the University of Duisburg and BAW in Germany. This blind validation workshop showed that SlenderFlow software was able to predict ship sinkage and trim with a high degree of accuracy.

PreSquat - Workshop on numerical prediction of ship squat in restricted waters

Benchmarking of ship wave-induced motions in shallow water

This study was done in partnership with DNV-GL, Flanders Hydraulics Research and Ghent University. Various ship motion codes were validated against model tests of bulk carriers and container ships in shallow water. The report helped to define the accuracy and limitations of predicting ship under-keel clearance in waves.

Comparison of AQWA, GL RANKINE, MOSES, OCTOPUS, PDSTRIP and WAMIT with model test results for cargo ship wave-induced motions in shallow water

Fremantle ship UKC trials

Full-scale trials were undertaken on 16 container ship transits into and out of Fremantle. The results are being used to validate numerical prediction methods for ship sinkage, trim, heel and wave-induced motions.

Ship motion measurements for ship under-keel clearance in the Port of Fremantle

Geraldton ship UKC trials

Full-scale trials were undertaken on 13 bulk carrier transits into and out of Geraldton. The results have been used to validate numerical prediction methods for ship sinkage and trim.

Measured ship motions in Port of Geraldton approach channel

Real-time ship UKC monitoring

A method is developed for real-time ship UKC monitoring, using permanently-installed GNSS receivers onboard ships.

Ship under-keel clearance monitoring using RTK GPS

Ship UKC for passing vessels

This paper is referenced in PIANC's "Harbour Approach Channels - Design Guidelines" for calculating sinkage and trim of ships passing in shallow water.

Sinkage and trim of two ships passing each other on parallel courses

Ship sinkage and trim in different canal widths

Hamburg presentation describing model test results for ship sinkage and trim in different canal widths, compared with numerical methods.

Application of potential flow methods to ship squat in different canal widths

Geraldton moored ship motions

Presentation to The Nautical Institute describing measured and modelled motions of moored ships in the Port of Geraldton.

Moored ship motions in the Port of Geraldton

Swan River boat wake trials

Report on the comprehensive measurement campaign that led to the revision of speed limits along the Swan River.

Full-scale boat wake and wind wave trials on the Swan River

Archive with PDF links

--2018--

Ha, J.-H., Gourlay, T.P. 2018 Bow and stern sinkage coefficients for cargo ships in shallow open water. PIANC Bulletin 2018.

Ha, J.-H., Gourlay, T.P. 2018 Validation of container ship squat modelling using full-scale trials at the Port of Fremantle. Journal of Waterway, Port, Coastal and Ocean Engineering, Vol. 144, No. 1.

Tezdogan, T., Terziev, M., Oguz, E., Gourlay, T.P., Demirel, Y.K., Incecik, A. 2018 Numerical investigation of the behaviour and performance of ships advancing through restricted shallow waters. Journal of Fluids and Structures, Vol. 76.

Algie, C., Gourlay, T.P., Lazauskas, L., Raven, H.C. 2018 Application of potential flow methods to fast displacement ships at transcritical speeds in shallow water. Under review.

Ha, J.-H., Gourlay, T.P. 2018 Full-scale measurements and method validation of container ship wave-induced motions at the Port of Fremantle. Under review.

--2017--

Gourlay, T.P. 2017 Moored ship motions in the Port of Geraldton. Presented to the Nautical Institute, March 2017.

Gourlay, T.P., Ha, J.-H. 2017 What level of wave data is needed for ship motion analysis? A ship hydrodynamics point of view. 3rd Australian Wind Waves Symposium, October 2017.

--2016--

Gourlay, T.P., Lataire, E., Delefortrie, G. 2016 Application of potential flow methods to ship squat in different canal widths. Proceedings, 4th International Conference on Ship Manoeuvring in Shallow and Confined Water (MASHCON 2016), Hamburg.

Parisella, G., Gourlay, T.P. 2016 Comparison of open-source code Nemoh with Wamit for cargo ship motions in shallow water. CMST Report 2016-23.

Ha, J.-H., Gourlay, T.P. 2016 Ship motion measurements for ship under-keel clearance in the Port of Geraldton. CMST Report 2016-28.

Ha, J.-H., Gourlay, T.P., Nadarajah, N. 2016 Measured ship motions in Port of Geraldton approach channel. Proceedings, 4th International Conference on Ship Manoeuvring in Shallow and Confined Water (MASHCON 2016), Hamburg.

Ha, J.-H., Gourlay, T.P. 2016 Ship motion measurements for ship under-keel clearance in the Port of Fremantle. CMST Report 2016-07.

Mucha, P., Deng, G., Gourlay, T.P., el Moctar, O. 2016 Validation studies on numerical prediction of ship squat and resistance in shallow water. Proceedings, 4th International Conference on Ship Manoeuvring in Shallow and Confined Water (MASHCON 2016), Hamburg.

--2015--

Gourlay, T.P. 2015 Ship Under-Keel Clearance. Book chapter in Navigation Accidents and their Causes, The Nautical Institute.

Gourlay, T.P., Dawson, E. 2015 A Havelock-source panel method for near-surface submarines. Journal of Marine Science and Application, Vol. 15, No. 3.

Gourlay, T.P., Ha, J.-H., Mucha, P., Uliczka, K. 2015 Sinkage and trim of modern container ships in shallow water. Proceedings, Coasts and Ports, Auckland.

Gourlay, T.P., von Graefe, A., Shigunov, V., Lataire, E. 2015 Comparison of AQWA, GL RANKINE, MOSES, OCTOPUS, PDSTRIP and WAMIT with model test results for cargo ship wave-induced motions in shallow water. Proceedings, 34th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2015), St. John's.

--2014--

Gourlay, T.P. 2014 ShallowFlow: a program to model ship hydrodynamics in shallow water. Proceedings, 33rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2014), San Francisco.

Gourlay, T.P. 2014 Duisburg Test Case containership squat prediction using ShallowFlow software. Proceedings, PreSquat International Squat Benchmarking Workshop, Duisburg.

Gourlay, T.P. 2014 Under-keel clearance: Mind the gap. Shipping Port International, Showcase 2014.

Wilkes, D.R., Gourlay, T.P., Gavrilov, A.N. 2014 A comparison of numerical methods for the time domain modelling of pile driving noise in the near field. Proceedings, Internoise 2014, Melbourne.

--2013--

Gourlay, T.P. 2013 Ship squat in non-uniform water depth. Proceedings, Coasts and Ports, Sydney.

--2012--

Giorgi, G., Teunissen, P.J.G., Gourlay, T.P. 2012 Instantaneous Global Navigation Satellite System (GNSS)-based attitude determination for maritime applications. IEEE Journal of Oceanic Engineering, Vol. 37, No. 3.

Gourlay, T.P. 2012 From cargo ships to skimboards - what happens to the wave resistance hump in shallow water? Australian Naval Architect 16, No. 2, May 2012, pp. 39-41.

Veen, D.J., Gourlay, T.P. 2012 A combined strip theory and Smoothed Particle Hydrodynamics approach for estimating slamming loads on a ship in head seas. Ocean Engineering 43, pp. 64-71.

--2011--

Gourlay, T.P. 2011 A brief history of mathematical ship-squat prediction, focussing on the contributions of E.O. Tuck. Journal of Engineering Mathematics 70, Tuck Memorial Issue, pp. 5-16.

Gourlay, T.P. 2011 Notes on shoreline erosion due to boat wakes and wind waves. CMST Report 2011-16.

Veen, D.J., Gourlay, T.P. 2011 A 2D Smoothed Particle Hydrodynamics theory for calculating slamming loads on ship hull sections. Proceedings, RINA High Speed Marine Vessels conference, Fremantle.

Gourlay, T.P., Martellotta, J. 2011 Aero-hydrodynamics of an RS:X Olympic racing sailboard. CMST Report 2011-02.

Gourlay, T.P. 2011 An inside downhaul system for RS:X sailboards. CMST Report 2011-02a.

--2010--

Gourlay, T.P. 2010 Hydrodynamic effects on fast monohulls or catamarans travelling through the critical speed in shallow water. ANZIAM Journal 51, pp. C137--C154.

Gourlay, T.P. 2010 Full-scale boat wake and wind wave trials on the Swan River. CMST Report 2010-06.

Giorgi, G., Gourlay, T.P., Teunissen, P.J.G., Huisman, L., Klaka, K. 2010 Carrier phase ambiguity resolution for ship attitude determination and dynamic draught. Proceedings, FIG Congress, Sydney.

--2009--

Gourlay, T.P. 2009 Sinkage and trim of two ships passing each other on parallel courses. Ocean Engineering 36, No. 14, pp. 1119-1127.

Gourlay, T.P., Cray, W.G. 2009 Ship under-keel clearance monitoring using RTK GPS. Proceedings, Coasts and Ports, Welllington.

Veen, D.J., Gourlay, T.P. 2009 An investigation of slam events in two dimensions using Smoothed Particle Hydrodynamics. Proceedings, 10th International Conference on Fast Sea Transportation (FAST 2009), Athens.

--2008--

Gourlay, T.P. 2008 Validation of KeelClear software in Torres Strait. CMST Report 2008-05, prepared for Australian Reef Pilots.

Veen, D.J., Gourlay, T.P 2008 SPH study of high speed ship slamming. Proceedings, ERCOFTAC SPHERIC IIIrd International Workshop, Lausanne, Switzerland.

Gourlay, T.P. 2008 Dynamic draught of container ships in shallow water. International Journal of Maritime Engineering, 150, part A4, pp.43-56.

Gourlay, T.P. 2008 Sinkage and trim of a fast displacement catamaran in shallow water. Journal of Ship Research 52, No. 3, pp. 175-183.

Gourlay, T.P. 2008 Slender-body methods for predicting ship squat. Ocean Engineering 35, No. 2, pp. 191-200.

--2007--

Gourlay, T.P., Klaka, K. 2007 Full-scale measurements of containership sinkage, trim and roll. Australian Naval Architect 11, No. 2, May 2007, pp. 30-36.

Gourlay, T.P. 2007 Ship underkeel clearance in waves. Proceedings, Coasts and Ports, Melbourne.

--2006--

Gourlay, T.P. 2006 Flow beneath a ship at small underkeel clearance. Journal of Ship Research 50, No. 3, pp. 250-258.

Gourlay, T.P. 2006 A simple method for predicting the maximum squat of a high-speed displacement ship. Marine Technology 43, No. 3, pp. 146-151.

--2005--

Gourlay, T.P., Duffy, J.T., Forbes, A. 2005 The bore produced between the hulls of a high-speed catamaran in shallow water. International Journal of Maritime Engineering 147, Part A3, pp. 1-8.

--2004--

Gourlay, T.P., Cook, S. 2004 Flow past a ship radiating a bore in a channel. Journal of Engineering for the Maritime Environment, 218, Part 1, pp. 31-40.

--2003--

Gourlay, T.P. 2003 Ship squat in water of varying depth. International Journal of Maritime Engineering 145, Part A1, pp. 1-12.

Gourlay, T.P., Lilienthal, T. 2003 Toward an overall dynamic stability assessment in following seas. Proceedings, 8th. International Conference on the Stability of Ships and Ocean Vehicles (STAB 2003), Madrid.

--2002--

Gourlay, T.P., Lilienthal, T. 2002 Dynamic stability of ships in waves. Proceedings, Pacific 2002 International Maritime Conference, Sydney.

Lilienthal, T., Gourlay, T.P. 2002 Dynamic stability in following seas. Asia Pacific Workshop on Marine Hydrodynamics, Kobe.

--2001--

Gourlay, T.P. 2001 The supercritical bore produced by a high-speed ship in a channel. Journal of Fluid Mechanics 434, pp. 399-409.

Gourlay, T.P., Tuck, E.O. 2001 The maximum sinkage of a ship. Journal of Ship Research 45, No. 1, pp. 50-58.

--2000--

Gourlay, T.P. 2000 Mathematical and computational techniques for predicting the squat of ships. PhD thesis, Dept. Applied Mathematics, University of Adelaide.

--1990s--

Gourlay, T.P. 1999 The effect of squat on steady nonlinear hydraulic flow past a ship in a channel. Schiffstechnik, Ship Technology Research, 46, No. 4, pp. 217-222.

Gourlay, T.P., Tuck, E.O. 1998 One-dimensional theory for flow past a ship in a channel of variable depth. Australian Mathematical Society Gazette 25, No. 4, pp. 206-211.

Gourlay, T.P., Tuck, E.O. 1998 Hydraulic and slender-body shallow-water theories for flow past a ship in a channel, and determination of squat. Proceedings, 3rd Biennial Engineering Mathematics and Applications Conference, Adelaide.

Gourlay, T.P. 1994 Planing. Honours thesis, Dept. Applied Mathematics, University of Adelaide.


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