S102014 Measurement of Changes in Harmonic Numbers along Cylindrical Axis in Liquid Partially Filled Cylindrical Shell

Abstract

Vibration modes measurement and an analysis method on the partially stiffened cylindrical shell with attached mass which contains liquid partially in it, were developed. Since it was measured that the harmonic numbers of circumferential vibration modes of the liquid filled lower part is different from that of the empty upper one, a finite strip method, which is taken into account the geometrical stiffness of hoop stress due to the contained liquid, partial mass and stiffness by attached elements, was developed. As a result, experimental natural frequencies that the harmonic numbers changes along axis are good agreement to those by analysis.