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Kinematic excitations provoke the motion and vibrations of the construction, which in turn considerably affects hydrodynamic loads generated on the walls of liquid cargo tanks. The issues of hydrodynamics also refer to the constructions fixed to the bottom, and thosehalf-immersed, fully immersed, and floating(drillingplatforms).Theymainlyconcernshiptanks and oceanotechnical tanks. The theoretical and numerical analysis for long an short tanks, fully or partially filledwithliquidhasbeenperformed.Thedeterminedhydrodynamicloads directly refer to the strength of the tank structure, which provides opportunities for determining the constructional strength of the entire hull. Extremely severe requirements are to be met by tanks used for carrying radioactive liquids, as an extremely high safety level is to be secured on all cargo carriers used in marine and land transport
The research was performed with the use of plexiglass models subdivided into 12 separate compartments. The compartments can be filled with a liquid. The model was excited to vibrations within a given frequency band by means of an exciter and accelerations were measured in selected points of the model. During measurement series oscillograms were obtained for various filling states at continuously changing range of measured frequencies. The oscillograms obtained for free vibrations measured on liquid-filled tank models were then processed. Results of the model tests were compared with those theoretically calculated for simple cases of tank-liquid system. The simple cases were used to test correctness of the elaborated computational program for determining hydrodynamic loads applied to tank walls. The application program for determining hydrodynamic internal loads was elaborated. Also, the influence of liquid filling state on values of loading, accelerations and wall deformations was demonstrated
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