Preliminary Experimental Investigation of a Broad Base Liquid Storage Tank

摘要

The results of forced and ambient vibration studies of the dynamic behavior of a steel liquid storage tank with a diameter of approximately 115 ft. and a height of 40 ft. are presented. The water elevation in the tank was changing during the tests from 35 ft.-6 in. to 38 ft.-0 in. Frequency response curves were determined from the ambient vibration tests; resonant frequencies, associated viscous damping factors, vertical and circumferential mode shapes, at 10 ft. height in radial and tangential direction, from the forced vibration tests. Especially for the lower order modes significant radial and vertical (rocking motion) displacements at the base were observed.