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DINAME2019
DINAME2019
A Comparative Study of a Vibro-Impact System with Linear and Nonlinear Bit-Rock Interactions
Submission Author:
MAOLIN LIAO , beijing , China
Co-Authors:
MAOLIN LIAO
Presenter: MAOLIN LIAO
doi://10.26678/ABCM.DINAME2019.DIN2019-0056
Abstract
This paper presents a comprehensive numerical study of a higher order drifting oscillator. This system has been applied to model vibro-impact drilling dynamics by Wiercigroch's group (Ajibose et al.\ 2010, 2012, 2015, and Liao et al.\ 2016, 2017). In this present work, we focus on the study of the bit-rock interactions, for which both linear and nonlinear models of the drilled medium are considered. Based on path-following methods, two-parameter bifurcation analyses are implemented via a software package, COCO (Dankowicz and Schilder, 2013). The analyses considered the excitation frequency, amplitude of excitation and the static force as the main control parameters, while the rate of penetration (ROP) was chosen as the main system output so as to assess the performance of the system when linear and nonlinear bit-rock impact models are used.
Keywords
Vibro-impact drilling, bit-rock interaction, Nonsmooth dynamical system, COCO
