SafetyatSea has considerable experience in the design of vessel modifications for upgrade to new safety standards. Our links with the SSRC design group allow us to be at the forefront of innovative design processes.

Finalised design work is carried out using a combination of industry standard applications such as NAPA and additional in-house software, which allows efficient design optimisation and enables ready interfacing with other companies.

The latest concepts in design for the development of hull forms are used at SafetyatSea including concepts such as the complementary use of the three methods of hull form generation:

• Parent Hull Transformation
• Parametric Surface development
• Manual Surface development

This concept allows the flexible and consistent development of hull forms which, when used with CFD and model testing, allow the efficient search for an optimal design solution.

Considerable expertise has been developed at SafetyatSea in the latest CFD techniques. The RANSE solver is used to predict resistance for most hull forms and speed ranges. Codes of this type facilitate the solution of the non-linear, largeamplitude free surface condition with full consideration of viscous effects. This allows the relative merits of hull forms to be evaluated in the form of changes in resistance, flow patterns and pressure distribution over the hull which can prove critical in the design process.

Although the usefulness of RANSE results in the design process is unmatched, the analysis is computationally extensive. The need to produce CFD results rapidly to assist in the preliminary design process is satisfied at SafetyatSea using SSRC's potential codes which employ the time domain transient Green function for the solution of the nonlinear resistance problem. These codes can evaluate the ideal fluid flow pattern quickly giving much of the information needed to assess changes in the preliminary design.

Further information

Kieran Dodworth (k.dodworth@safety-at-sea.co.uk)