Efficient energy transfer often occurs between oscillation modes in a resonator when they are tuned to internal resonance. We design the eigenfrequencies of two vibrational an electromechanical be close ratio 3:1 and demonstrate that supplied upper mode can controllably transferred lower mode. With vibrating with period tripled mode, discrete time-translation symmetry imposed by periodic drive ...

Abstract This paper investigates the transverse 3:1 internal resonance of an axially transporting nonlinear viscoelastic Euler-Bernoulli beam with a two-frequency parametric excitation caused by speed perturbation. The Kelvin-Voigt model is introduced to describe characteristics beam. governing equation and associated boundary conditions are obtained Newton’s second law. method multiple scales ...

Highlights. Ultrasound and MR venography of internal jugular veins in case unilateral cerebellar hypoplasia or extrinsic stenosis enables noninvasively without contrast agents differentiation these conditions due to local region-specific indicators, including the area velocity blood flow, arterial-venous balance, visualization low compression factor, overall clinical picture venous network neck...

The inner moons of Jupiter and Saturn migrate outwards due to tidal energy dissipation within the planets, the details of which remain poorly understood. We demonstrate that resonance locking between moons and internal oscillation modes of the planet can produce rapid tidal migration. Resonance locking arises due to the internal structural evolution of the planet and typically produces an outwa...