in this paper, the nonlinear free vibrations of thin symmetric and non-symmetric cross-ply composite plates subjected to biaxial initial stresses are investigated. because of their excellent properties such as specific strength and specific stiffness, composite plates have wide applications in aerospace and mechanical structures. based on von-karman's strain-displacement relations and using gal...

When material is subjected to an intense load its stiffness changes due to elastic nonlinearity. This effect is especially pronounced in damaged materials so that nonlinearity can be used as an indication of incipient damage. Under dynamic load, mechanical constraint between the fragments of planar defects provides gigantic nonlinearity in finite-amplitude contact vibrations. The local vibratio...

This paper is concerned with the extension of existing nonlinear physical modeling sound synthesis cymbals to that involving dynamics washers supporting center and sticks/mallets striking cymbals. The body a cymbal physically modeled as shallow spherical shell its governing equation discretized in space using finite difference method, was implemented research. In addition, washer, related suppo...

In order to solve the problems of limited installation space and strict additional quality, effects internal distributed nonlinear energy sinks (NES) considering optimal locations on a composite truss core sandwich plate are investigated in this paper. Choose five NESs here inset them different places suppress vibration plate, which is excited by half-wave shock. The coupled dynamic equations s...

From a theoretical viewpoint, the vocal folds vibration affects the vocal tract transfer characteristics through nonlinear time-varying interaction between the glottis and vocal tract. Therefore, it is crucial to investigate and model such e ects in order to improve voice quality in parametric rule-based speech synthesis systems. In this paper, we rst conducted analytic experiments on the vocal...

Abstract In this contribution, a system simulation method based on the finite element (FEM) is applied to simulate strongly coupled bimorph piezoelectric vibration-based energy harvester (PVEH) with various nonlinear, non-ideal and active circuits: The standard circuit, synchronized switch harvesting inductor circuit electric charge extraction are considered. Furthermore, nonlinear elastic beha...

Traditional linear spectral analysis techniques of the vibration signals, based on auto-power spectrum, are used as common tools of rotating components diagnoses. Unfortunately, linear spectral analysis techniques are of limited value when various spectral components interact with one another due to nonlinear or parametric process. In such a case, higher order spectral (HOS) techniques are reco...

Crossties and cable networks are used on cable-stayed bridges to mitigate wind-induced stay vibration. A nonlinear free-vibration analysis of a cable network with random oscillation amplitudes is presented in this study. Specifically, a nonlinear restoring-force spring model is introduced at the crosstie to simulate in-plane network free vibration at large amplitudes. The current constitutive m...

In the present study, nonlinear free vibration behavior of nanobeam subjected to magnetic field is investigated based on Eringen’s nonlocal elasticity and Euler–Bernoulli beam theory. The Hamilton’s principal is adopted to derive the governing equations together with Euler–Bernoulli beam theory and the von-Kármán’s nonlinear strain–displacement relationships. An approximate analytical solution ...

Wave vibration analysis approach is found a systematic and concise approach in solving complex vibration problems in built-up frame structures. From the wave vibration standpoint, vibrations propagate along a uniform waveguide, and are reflected and transmitted at discontinuities. In this study, a multi-story multi-bay steel frame is built. The wave vibration analysis approach is applied to stu...