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This advanced module in surface ship dynamics covers the analysis methods (both theoretical and empirical) for assessing the seakeeping and manoeuvabilty of floating structures. A pre-requiste for seakeeping analysis is understanding and describing ocean waves as the forcing function for a ship鈥檚 seakeeping responses.

Ocean Waves & Random Processes:

鈥� Describe the fundamental principles of ocean wave theories and random processes relating to waves and vessel motions.

鈥� Calculate the characteristics and behaviour of regular ocean waves and apply techniques to characterise the ocean irregular wave environment.

鈥� Use probabilistic techniques to determine the probability of occurrence of wave and ship motion events.

鈥� Describe the concepts and processes of seakeeping analysis in the design process, ship motion model experiments and ship hydroelasticity.

Seakeeping:

鈥� Apply techniques to predict the roll, pitch and heave motion of a vessel travelling in regular waves and irregular waves and understand the physical mechanism of various design/operational options for motion control and reduction.

鈥� Understand and explain the concepts of dynamic stability, motion characters including linear response for resonance, parametric rolling, drift/sum frequency/difference frequency motions.

Manoeuvring

鈥� Develop the equations of motion for manoeuvring of surface ships in 2D space, examining the similarities and differences as compared to the equations for seakeeping.

鈥� Use linear analysis to obtain analytical expressions to predict directional stability/instability and the steering effectiveness of a ship鈥檚 rudder(s).

鈥� Apply manoeuvring theory to model helmsman and autopilot control of ships.

鈥� Explore how to model non-linearities in the hydrodynamic loadings on a ship鈥檚 hull during manoeuvring.

鈥� Numerical modelling of manoeuvring equations and manoeuvring simulators.

鈥� How to obtain hydrodynamic coefficients for manoeuvring equations, and understand their links to the coefficients used in seakeeping equations.

鈥� Examine manoeuvring trials carried out on new ships to determine their manoeuvrability and controllability.

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Aims of the module

The module is divided into two parts, seakeeping and manoeuvring.

The first part of the module covers the seakeeping analysis of a floating ocean structure. The aim is to impart knowledge of seakeeping theory on predicting loads and motion responses of floating structures in regular or irregular waves (deterministic theory), and give statistical sea-states (probabilistic theory).

In the manoeuvring part of the module, the aim is to impart knowledge of the definitions, theory and applications of manoeuvring in ship design and operation.

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Intended learning outcomes

At the end of the module students will be able to:

鈥� understand the key characteristics of the ocean environment, ship hydrodynamic design and their interactions in affecting ship manoeuvrability and seakeeping (AHEP M1)

鈥� analyse the manoeuvring behaviour of ships in a seaway to predict essential operating characteristics (AHEP M3)

鈥� determine the motions of a floating body in a seaway and the impact that those motions will have on ship operation, habitability and human factors (AHEP M2, M3)

鈥� identify and critically analyse those factors in ship design that affect manoeuvring and seakeeping performance and associated mitigation measures to improve response. (AHEP M2, M17)

鈥� Develop and analyse trials to determine ship manoeuvrability and seakeeping trials (AHEP M3)

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Higher level learning outcomes (AHEP M1, M2, M3, M4, M17) as defined in the Engineering Council鈥檚 鈥淎ccreditation of Higher Education Programmes鈥� 4th Edition ( AHEP 4) published 2020.