水の入った円筒タンクに生起する非線形振動応答

抄録

Cylindrical shell tanks with water on a shaking table driven with sinusoidal excitation show various nonlinear responses. In order to make clear some causes of the response, we have been examining the system on both theoretical and experimental aspects. Here, basing upon experimental vibration tests of the tank, we show the nonlinear responses higher-harmonic oscillations and sub-harmonic oscillations. Various sub-harmonic oscillations branched out on some frequency regions and became significant responses with large amplitudes. Then, focusing the sub-harmonic responses, we examine relation the instability regions and the natural frequencies of the system, plotted for external frequency and the amplitude.