Masaru Sakata

TL;DR: In this paper, the authors investigated the stability of flexural vibration of a thin rotating ring with respect to the effects of the Coriolis forces and determined that for all the flexural modes of the rotating ring no instability phenomenon exists, in the sense that the natural frequencies of the rotation never become zero over the whole range of rotational speed.

TL;DR: In this article, the dynamics of a weakly nonlinear single-degree-of-freedom system subjected to combined parametric and external excitation was studied and the averaging method was used to establish the existence of invariant tori and analyze their stability.

TL;DR: In this article, the energy-release rates associated with the translation, rotation, self-similar expansion and distortion of the fracture process region are expressed by the newly introduced integrals, J, L, M, and I.

TL;DR: In this article, the non-stationary response of non-linear liquid motion in a cylindrical tank subjected to lateral earthquake excitation is investigated by modeling the earthquake as an amplitude modulated non-white random process having a dominat frequency.

TL;DR: In this article, an approximate method is developed to calculate the nonstationary response of a non-linear system subjected to non-white excitation, which consists in modification of the equivalent linearization technique and the use of the moment equations of an equivalent linear system to evaluate the mean square response.