Imperial College London

DrLoicSalles

Faculty of EngineeringDepartment of Mechanical Engineering

Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 2243l.salles Website

 
 
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Assistant

 

Mr Peter Higgs +44 (0)20 7594 7078

 
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Location

 

556City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sun:2020:10.1115/1.4046953,
author = {Sun, Y and Yuan, J and Pesaresi, L and Denimal, E and Salles, L},
doi = {10.1115/1.4046953},
journal = {Journal of Vibration and Acoustics},
title = {Parametric study and uncertainty quantification of the nonlinear modal properties of frictional dampers},
url = {http://dx.doi.org/10.1115/1.4046953},
year = {2020}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - A numerical methodology is described to study the influ-ence of the contact location and contact condition of fric-tion damper in aircraft engines. A simplified beam model isused to represent the blade for the preliminary design stage.The frictional damper is numerically analysed based on twoparameters, contact angle and vertical position of the plat-form. The nonlinear modal analysis is used to investigatethe nonlinear dynamic behaviour and damping performancesof the system. Harmonic balanced method with continua-tion technique is used to compute the nonlinear modes for alarge range of energy levels. Using such a modelling strat-egy, modal damping ratio, resonant amplitude and resonantfrequency are directly and efficiently computed for a rangeof design parameters. Monte Carlo simulations togetherwith Latin hypercube sampling is then used to assess the ro-bustness of the frictional damper, whose contact parametersinvolve much uncertainties due to manufacturing toleranceand also wear effects. The influences of those two parame-ter are obtained and the best performances of the frictionaldamper can be achieved when the contact angle is around25-30. The vertical position of the platform is highlymode-dependent and other design considerations needs to beaccounted. The results have been proved that the uncertain-ties involved contact surfaces do not have significant effects∗Address all correspondence for other issues to this author.on the performance of frictional damper.
AU - Sun,Y
AU - Yuan,J
AU - Pesaresi,L
AU - Denimal,E
AU - Salles,L
DO - 10.1115/1.4046953
PY - 2020///
SN - 0739-3717
TI - Parametric study and uncertainty quantification of the nonlinear modal properties of frictional dampers
T2 - Journal of Vibration and Acoustics
UR - http://dx.doi.org/10.1115/1.4046953
ER -