Dynamische Interaktion von Fluessigkeitsbehaeltern und Baugrund

For the analysis of the dynamic behaviour of liquid-storage-tanks, in many cases, the interaction of the tank, the fluid and the soil has to be taken into account. For the discretization of the three-dimensional model the Finite Element Method shall be used to describe the cylindrical tank, while the Boundary Element Method is applied to approximate the elastic soil and the compressible irrotational fluid. The implicitly frequency-dependent Boundary Element formulation for fluid and soil is transformed to a new formulation with frequency-independent stiffness-, damping- and massmatrices. By using this method, it is possible to determine natural frequencies, to analyse the structure in time-domain and to couple easily subdomain discretized by the Boundary Element Method and the Finite Element Method. The advantages and disadvantages of this method are demonstrated by various examples of fluid- and elastodynamics. This numerical method is used to analyse the influence of the soil-structure-interaction, the elasticity of the shell and the movement of the free surface ('sloshing') on the dynamic behaviour of the tank. The results of the numerical dynamic analysis are compared with results of simple models, and conclusions on their correctness are drawn. (orig.)Available from TIB Hannover: RR 5346(16) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman