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Journal articles
Non-linear dynamics of a drill-string with uncertain model of the bit-rock interaction
Abstract : The drill-string dynamics is difficult to predict due to the non-linearities and uncertainties involved in the problem. In this paper a stochastic computational model is proposed to model uncertainties in the bit-rock interaction model. To do so, a new strategy that uses the non-parametric probabilistic approach is developed to take into account model uncertainties in the bit-rock non-linear interaction model. The mean model considers the main forces applied to the column such as the bit-rock interaction, the fluid-structure interaction and the impact forces. The non-linear Timoshenko beam theory is used and the non-linear dynamical equations are discretized by means of the finite element method. (C) 2009 Elsevier Ltd. All rights reserved.
Cited literature [31 references]
https://hal-upec-upem.archives-ouvertes.fr/hal-00684337
Contributor : Christian Soize <>
Submitted on : Sunday, April 1, 2012 - 4:35:48 PM
Last modification on : Wednesday, February 17, 2021 - 10:42:04 AM
Long-term archiving on: : Monday, July 2, 2012 - 3:14:52 AM
Contributor : Christian Soize <>
Submitted on : Sunday, April 1, 2012 - 4:35:48 PM
Last modification on : Wednesday, February 17, 2021 - 10:42:04 AM
Long-term archiving on: : Monday, July 2, 2012 - 3:14:52 AM
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