ANALYSIS OF COUPLED DRILL-STRING VIBRATIONS USING A NONSMOOTH SYSTEM
Luciano Moraes1; Marcelo Savi2
1 Centro Federal de Educação Tecnológica, CEFET; 2 Universidade Federal do Rio de Janeiro, COPPE
Resumo
A coupled four-degree of freedom nonsmooth model is adopted to describe the drill-string vibration. A parametric study is done through bifurcation diagrams. The goal is to understand how the vibration modes interact with each other and identify critical responses. A variety of operational conditions are investigated, allowing one to obtain a deep understanding of the drill-string global behavior proposing mitigation of critical responses.
Palavras-chave: Discontinuous Dynamical Systems; Nonlinear Dynamics and Complex Systems; Chaos and Global Nonlinear Dynamics; Drilling; Non-smooth Systems