Below we show a few historical highlights from our research activities in the past within waves and computational geometry.
Since 1993, SINTEF Applied Mathematics has developed the UNDA computer simulator for calculations of fully nonlinear waves around marine structures. The picture shows the surface elevation between four platform legs in a simulation of large waves hitting the structure.
Platforms in the North Sea are exposed to extreme wave loads. Calculations of forces from waves hitting the legs of the platform are important to the safety offshore.
The picture shows ocean waves that are refracted off the coast of Finnmark, near Hasvik. The project Geosim demonstrates the use of Geographic Information Technology (GIT) in numerical calculations of natural phenomena.
The picture shows water waves that are focused by means of a convex lens in a basin for experiments in Hakadal. The experiment, which was done at the end of the seventies, shows that it is possible to collect wave energy in to a small area, for instance, in connection with ocean wave power plants.
The experiment in Hakadal was simulated on a computer. The figure shows a screen capture of a wave simulation from the late seventies.
The figure shows the intensity of acoustic waves hitting a U-shaped sound-soft scatterer. The simulation demonstrates the use of open boundary conditions to ensure that the acoustic waves pass through the domain without reflections at the boundary.
The ocean wave power plant at Toftestallen in Øygarden, outside Bergen, was finished in 1985. The installation was built by Norwave, which was started by Even Mehlum, among others, as a result of the wave activity at SI/SINTEF. The picture shows the funnel where the ocean waves wash into a basin a few meters above sea surface. The turbins generating the electric current are seen in the background.
The national supercomputing project started at SINTEF in the autumn of 1986. In the picture, two of the most central persons, Bjørnar Pettersen and Arve Dispen, are standing in front of the Cray X-MP/24. The computer is now retired and placed at Teknisk Museum (the Norwegian Technological Museum) in Oslo.
Scientific visualisation of data from the supercomputer was a main activity the first years the computer was in use. The weather-map over Europe is generated by the NIMBUS software, which was developed at SINTEF. This was the predecessor of the weather forecast system used on TV2. The program is being further developed by Weather One, in cooperation with SINTEF Applied Mathematics .
The picture shows a 3D-map over different types of vegetation in the area around Evenes airport. Each colour represent a unique type of forest or vegetation. The modell of the terrain is a hierarchical triangulation based on elevation data of 10m precision. The 3D-map can be navigated interactive on a computer.
Economic, ecological and aesthetic criteria have to be satisfied when making long term plans for forestry. Such criteria vary from demand for selection/outlet profile to prevention of erosion and preservation of the biodiversity. In cooperation with organisations in Norwegian forestry, SINTEF Applied Mathematics has developed ECOPLAN for optimal management of forest areas.
Dynamic visualisation of 3D ship geometry on Evans & Sütherland Picture System II. The equipment was state of the art in 1979.
One of the first uses of numerical control was for cutting torches in shipyards. The steering units, which were developed in cooperation with Kongsberg Våpenfabrikk and Brødr. Sundt Verktøi-maskinfabrik AS in the first half of the sixties, were tested at Norwegian shipyards.
Volvo, designed by means of the system BOF (Car and Plane), made by SI beteween 1970 and 1972, for industrial design using a network of curves.
The picture shows interactive 3D terrain visualisation used in a flight simulator. The terrain model is based on an elevation database of 100m resolution from Statens Kartverk. Orthophotos are draped over the terrain model to give a realistic looking terrain. The technology is based on hierarchical triangulations and domain decomposition to get a continuous surface with variabel resolution.
SINTEF Applied Mathematics has worked with advanced 3D animation in the EU-project OCEANS 1998-2000.
SINTEF Applied Mathematics has cooperated with Hewlett-Packard's subsidiary company CoCreate Software on developing high quality DAC software since 1998.
The first European software for constrctions and productions (DAK/DAP) of ships, was named Autokon, and was developed at SI during the sixties. In the picture a supertanker is drawn by means of/with help of/in the system. This was "Windows" for shipbuilding in that period, with users all over the world.
Published November 7, 2012
Copyright © SINTEF | Email to SINTEF | About www.sintef.com