Vibration Testing-Theory and Practice

McConnell, K. G.; Varoto, Paulo Sérgio

doi:10.3397/1.3063168

Cited by 145 publications

(116 citation statements)

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“…The objective of this point is to provide a description of linear properties of an oscillatory system obeying the principle of superposition and presented in [1]. We will explain the terminology used in [1] pointing out some theoretical aspects being important for understanding the laboratory test procedures for resilient elements used in railway tracks [5][6][7]9]. Moreover, this introductory part prepares basic nomenclature used in next chapter where detailed analytical calculations are carried out based on Standard …”

Section: Mechanical Model Of Resilient Truck Elementsmentioning

confidence: 99%

Viscoelastic dynamic models of resilient elements used in railway tracks

et al. 2016

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Abstract. The paper presents selected theoretical aspects concerning viscoelastic dynamic modelling of resilient elements used in railway tracks. In order to characterize the research methodology for resilient mats in railway tracks, German Standards [1-4] are used herein. The main goal of the paper is to demonstrate the procedure of insertion loss calculation for a single degree of freedom truck system containing under-ballast mats. Selected results of certain dynamic characteristics of resilient truck systems (transmissibility, Bode and Nyquist plots etc.) are also discussed. The results of calculations visualized in graphs, were obtained by using own applications written in programming language MATLAB.

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Section: Mechanical Model Of Resilient Truck Elementsmentioning

confidence: 99%

Viscoelastic dynamic models of resilient elements used in railway tracks

et al. 2016

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“…where the relation between E and E 0 in the frequency domain is given by (15). The force exerted to the …”

Section: Shaker Modelmentioning

confidence: 99%

Nonlinear resonances in an axially excited beam carrying a top mass: simulations and experiments

Fey

Mallon²,

Kraaij³

et al. 2011

Nonlinear Dyn

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In this paper, nonlinear resonances in a coupled shaker-beam-top mass system are investigated both numerically and experimentally. The imperfect, vertical beam carries the top mass and is axially excited by the shaker at its base. The weight of the top mass is below the beam's static buckling load. A semi-analytical model is derived for the coupled system. In this model, Taylor-series approximations are used for the inextensibility constraint and the curvature of the beam. The steady-state behavior of the model is studied using numerical tools. In the model with a single beam mode, parametric and direct resonances are found, which affect the dynamic stability of the structure. The model with two beam modes

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“…Moreover the material attenuation is rather low at these frequencies. The response of an accelerometer to a Rayleigh-type wave pulse can be calculated by multiplying its frequency response function (FRF) and the amplitude spectrum of the generated Rayleigh-type pulse given by Eqn (15). Taking an inverse Fourier transform from this product, one can obtain the calculated time history of the acceleration measured by an accelerometer.…”

Section: Experimental Studies and Their Comparison With The Theorymentioning

confidence: 99%

“…Taking an inverse Fourier transform from this product, one can obtain the calculated time history of the acceleration measured by an accelerometer. The FRF of a typical accelerometer can be expressed as follows [15]:…”

Section: Experimental Studies and Their Comparison With The Theorymentioning

confidence: 99%