VIBRATION OF CYLINDRICAL - SHELLS PARTIALLY OR COMPLETELY FILLED WITH WATER

Abstract

This analytical and experimental investigation is carried out to study the dynamic behaviour of cylindrical shells without water and with water filled inside them. The shell model is tested to see its behaviour under shock type of loading at base. In the experimental study, two shells of diff-erent length to radius ratios have been studied and the water depth is varied in stages, Free Vibration _ tests are conducted under condition of initial dis-placement by pulling and releasing the shell itself and also by tapping the shell at different points. Forced vibration study is carried out by mounting a mechanical oscillator on the shaking table. The theoretical verification of the experimental results is done by analysing the shell as fixed at the base and free at the top. Some strange behaviour of the shell has been observed under forced vibrations and conclusions have been drawn which shall be helpful in further investi- gations.