Dr Thiago Ritto, Mechanical Engineering Department, Universidade Federal do Rio de Janeiro, Brazil

Uncertainties in the dynamical response and stability of mechanical systems: modeling, simulation and lab experiments
When Jun 17, 2019
from 02:00 PM to 03:00 PM
Where LR1, Thom Building
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Contact Phone +44 (0)1865 273030
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This work is interested in the modeling and simulation of uncertainties in the response and stability of mechanical systems. Two specific applications are tackled: drill string dynamics and pipe conveying fluid. In the first application the system is nonlinear and uncertainties in the bit-rock interaction (local nonlinearity) are taken into account. A test rig was designed and constructed in the Acoustics and Vibration Lab of the Federal University of Rio de Janeiro, such that simulation and experiments results might be compared. In the second application the system is linear and global uncertainties are taken into account using random matrices. For both applications the systems are discretized by means of the finite element method and a probabilistic approach is applied to model the uncertainties.