Shin Murakami

TL;DR: In this article, the authors examined the influence of the angular acceleration λ and the initial angular position ψ0 of a rotating shaft on the maximum amplitude of the subharmonic oscillation.

TL;DR: In this article, a 1/3-order subharmonic oscillation of forward precession is investigated in a rotating shaft system and the maximum amplitude during acceleration depends not only on the angular acceleration but also on the initial disturbance lP, the initial rotating speed ωs, and the initial angular posion of the unbalance.

TL;DR: In this article, the authors investigated the nonlinear vibrations of an elastic structure, with a liquid-filled cylindrical tank, which is subjected to a vertical sinusoidal excitation, and derived modal equations governing the coupled motions of the structure and liquid sloshing.

TL;DR: In this paper, the nonlinear vibrations of elastic structures containing two cylindrical liquid-filled tanks subjected to vertical harmonic excitation were investigated, and the results of the response curves differed from those obtained in the case where a structure had only one liquid-filled tank installed.

TL;DR: In this paper, the effect of the delay of electric current for control and the AMB force is represented by a power series function of the electric current, and the nonlinear theoretical analysis of a vertical rigid rotor-AMB system is demonstrated.