An analysis of thin-rod flexural acoustic wave gravimetric sensors immersed in liquid

摘要

A perturbation analysis of acoustic wave propagation properties for a stiff thin rod surrounded by a liquid is presented. A study is made of the velocity sensitivity of the lowest flexural acoustic mode, F/sub 11/, along a thin rod due to mass changes in the rod and variations in the surrounding liquid density. It is shown that the presence of the liquid decreases the velocity of the F/sub 11/ mode and also the mass sensitivity.