An Experimental Study on Vibration Characteristics of A Thin Spherical Tank-Water Interaction System

摘要

An experimental study on the dynamic behavior of a thin spherical tank-water interaction system is reported. The water-tank interaction system is horizontally fixed on a vibration table with equally spaced tabs on the outer shell and excited by vertical harmonic table motions. Several cases of chosen water levels were tested to investigate the variation of the system. The effect of free surface boundary is considered by opening the top hole of the tank, allowing the air inside the tank directly connecting into the air outside. While a plug closes the hole of the tank, the air inside the tank cannot go out which is considered as cases with no free surface effect.. The experimental results obtained show the variations of the natural frequencies and modes of the water-tank interaction system affected by the water levels and free surface, which provides a guideline of the liquid spherical tank design.