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Showing 1 to 11 of 11 for “"Random Vibrations"”.
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Random vibrations of mistuned periodic structures
Nearly periodic structures exhibit localized modes of vibration depending upon the ex· tent of the coupling and the disorder between their periodic components. These localized modes may cause excessive vibration amplitudes resulting in significantly higher stresses than the ones the structures …
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Random vibrations of composite beams and plates
… by this method are then used to calculate the random response characteristics of beams and plates subjected to spatially and temporally correlated random loads. In the analysis of beams, both symmetric cross-ply and angle-ply configurations have been considered. In the symmetric cross-ply …
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Random vibrations of bladed-disk assembly under cyclostationary excitation
Random vibration of a bladed-disk assembly is studied. A stochastic model for the excitation is developed. A unique feature of this model is the statistical periodicity of the blade forces called cyclostationary. A random process is called wide sense eyeclostationary and its statistics are periodic …
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Random Vibrations of Structures Under Parametric and Non-Parametric Earthquake Loads
… previously, especially from the point of view of random vibration. The secondary objective is to demonstrate the versatility of the mathematical theory of the Markov random process in structural dynamics applications.
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An Investigation into Nonlinear Random Vibrations based on Wiener Series Theory
… applications, nonlinear systems are excited randomly so this work examines systems under white-noise excitation using the Wiener series. Equivalent Linearisation (EL) is a well-known and simple method that approximates a nonlinear system by an equivalent linear system. However, it has …
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An approximate method for the transient response of nonlinear systems
… loads, namely, transient response, steady-state vibrations, and random vibrations. The motion studied usually depends upon the expected or predicted load which is sometimes called the input of the system. In what follows, only transient responses of systems subjected to short time-duration loads …
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Statistical Vibro-Acoustic Modelling of Nonlinear Systems with Applications in Vehicles
… system can be affected by nonlinearities in the vibrations transmission path. Therefore, this research has been focused in developing computationally efficient vibro-acoustic models to predict the statistical structural-acoustic response of a system to random inputs, as well as analysing the …
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A reduced-basis method for input-output uncertainty propagation in stochastic PDEs
… a growing interest in quantifying the effects of random inputs in the solution of partial differential equations that arise in a number of areas, including fluid mechanics, elasticity, and wave theory to describe phenomena such as turbulence, random vibrations, flow through porous media, and wave …
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Dynamically orthogonal field equations for stochastic fluid flows and particle dynamics
… laws. In all of the above cases the existence of random perturbations, combined with the complex dynamical mechanisms of the system often leads to their rapid growth which causes distribution of energy to a broadband spectrum of scales both in space and time, making the system state particularly …
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Predicting the vibration discomfort of standing passengers in transport
… Using 1-Hz and 8-Hz random vibrations with a range of crest factors it was found<br/>that the discomfort of standing subjects was better predicted with an exponent around 3,<br/>rather than an exponent of 2 implicit in r.m.s. averaging. The final experiment …