Integrated numerical and experimental methods in ship design

The proceedings of symposium Integrated numerical and experimental methods in ship design include ten papers covering a wide range of research activities of VTT and HUT ship laboratories. The effects of ice loads on different kind of marine structures are dealt in three papers. A review of recent experimental and modelling efforts to understand the local ice failure and ice-structure contact is presented. New models of propeller ice loads have been developed as well as methods for assessing ship operability in ice. Model tests give valuable contribution in validating numerical methods and in many cases model testing is the only way to get information of physical phenomena. The versatile use of model tests in ship design is described in five papers. They include a new approach to determine wave resistance utilising wave profile measurements, wave load measurements with segmented ship model, dynamic wind loads on ships in archipelago and in harbours as well as model tests with rudder propulsion systems. Also the significance of model tests is considered from the shipowner's point of view. The growth in the capacity of computers has made possible to solve the viscous flow around ships using Navier-Stokes solvers. Results of computations of the viscous double model flow around actual hull forms are presented. CFD-calculations are carried out using such a Navier-Stokes solver program called FINFLO. The increasing interest in environmental issues has also put special emphasis on the environmental impact assessment (EIA) of port and offshore operations. The basic elements of EIA procedure in marine and harbour operations are discussed including examples of maritime safety and the threat of oil spills.