Life Cycle Design. Projekt A5.2: Berechnung hydrodynamischer Massen- und Daempfungsmatrizen Schlussbericht

Reliable prognoses of the vibration behaviour of wetted thinwalled ship structures require the solution of hydroelastic interaction problems. Currently the simplifying added mass concept by Lewis is widely used in practice. But this method is unsuitable for treatment of complex geometries of structure and mixed exterior-interior problems of tank structures with special configurations of fluid domains, respectively. The project has been addressed to the development of a coupled Finite Element-Boundary Element method considering the three-dimensional hydrodynamic mass effect. The focus of interest was the handling of various theoretical aspects and the development of a FORTRAN program to meet practical demands. The BE-algorithm is based on a potential approach using an integral equation formulation by the direct method. An automatic preprocessing and a flexible element concept including finite and infinite boundary elements have been realized. In combination with commercial structural FE-components free and forced vibration problems can be solved. Special realistic conditions as shallow water conditions, vessel trim and coupled exterior-interior fluid configurations are considered. (orig.)SIGLEAvailable from TIB Hannover: F00B874+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman