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Interaction of liquid motion on mobile tank structure

Domagała M., Lisowski E.

Journal of KONES

2011

Vol. 18, No. 3

67-71

Mobile tank are widely used for transport various goods not only liquids but also gases, material in bulks and even cryogenic liquids. Such tanks have to fulfil a number of requirements arising from operational as well as design aspects, they have to resist on high pressure load and extremely low temperatures in case of cryogenic tanks. Mobile tank used on railway, vehicles or as a container on ships have to fulfil requirements for dynamic load that arising from interaction of fluid at tank. A lot of standards defines requirements for various mobile tanks and defines design procedures. One of most difficult is the interaction between fluid and tank structure during tank operation. Available standard defines a lateral and longitudinal acceleration as a dynamic load that tank has to fulfil. Standards like ADR or EN defines a simplified method of evaluating strength of tank structure on dynamic load. This paper presents a method of evaluating interaction of sloshing liquid on tank structure using FSI (Fluid Structure Interaction) with the use of CFD and FEM tool. Ansys Workbench environment simulation was used to evaluate influence of liquid motion on tank structure. CFD allowed simulating liquid sloshing at the tank at simultaneous longitudinal and lateral short peak of acceleration. Than these results were applied to structural simulation, for checking tank structure strength under loading with sloshing liquid.