The natural vibration characteristics of a water-shell tank interaction system

The simulation of liquid – tank interactions is important for LNG-tank designs and safe operations. This paper presents some research results developed by authors. Integrated systems studied are formulated using a generalised fluid-structure interaction theory. Various suitable boundary conditions applied to the system are considered, which describes free surface disturbances, dynamical couplings on wet interfaces as well as prescribed pressures caused by explosion waves. The mixed FE substructure – subdomain method and the corresponding computer code adopting the solid displacement and the fluid pressure as variables are described. A water-shell tank interaction system and a 2-dimensional section of a…