Many of the papers studying the screw-drive system dynamic model concentrated on the control methodologies that is why vibrational models are either simple lumped models or simplified flexible beam models. In this paper a screw-drive system dynamic model and its vibrations are discussed. The screw is considered as an EulerBernoulli type flexible beam with fixed-free boundary conditions and the ...

In this paper we develop a fully explicit cut finite element method for the wave equation. The is based on using standard leap frog scheme combined with an extension operator that defines nodal values outside of domain in terms inside domain. We show mass matrix associated extended space can be lumped leading to scheme. derive stability estimates and provide optimal order priori error estimates...

This study proposes the use of a linear and geometrically nonlinear inerter-based resonator in locally resonant acoustic metamaterials (LRAMs) evaluates performance on low-frequency wave attenuation. The LRAM is modeled as 1D chain system composed mass-in-mass unit cells connected by springs, geometrical nonlinearity achieved two lateral inerters linking lumped mass symmetrically with respect t...

This paper presents detailed performance status and projections for the silicon MEMS Quadruple Mass Gyroscope (QMG) – a unique high Q, lumped mass, mode-symmetric Class II Coriolis Vibratory Gyroscope (CVG) with interchangeable whole angle, self-calibration, and force rebalance mechanizations. Analysis of a QMG sealed without getter with a Q-factor of 1e3 reveals an Angle Random Walk (ARW) of 0...

Abstract The main objective of this paper is to propose a new metamaterial capable generating quasi-static stop band from zero frequency. modeled by lattice system made mass-in-mass units. unit cell the proposed contains resonator connected bar-spring mechanism embedded in host mass and also linked fixed substrate. behavior first investigated on basis lumped-parameter infinite model. equations ...

The quality and timbre of disordered voices heavily rely on the vibration properties vocal folds. We discuss representation sagittal phase differences in fold oscillations through a numerical biomechanical model involving lumped elements as well distributed elements, i.e., delay lines. A dynamic glottal source is proposed which displacement along vertical dimensions modelled using In contrast t...