...Ali Asghar Jafari; Reza Kazemi; Mohammad Faraji Mahyari The main goal of this research is to analyze the effects of drilling mud flow rate, drill string weight, weight on bit and angular velocity on stability and vibration of a drill string. To this end, kinetic and potential energies of a rotating...

...Chien-Min Liao; Balakumar Balachandran; Mansour Karkoub; Youssef L. Abdel-Magid In this article, reduced-order models of a drill-string system are developed, the predictions of these models are studied, and qualitative comparisons are made with experimental studies. The reduced-order models allow...

... vibrations drill string robust control μ-synthesis flexible rotor There have been a significant number of research publications on rotating machinery dynamics and a few representatives are considered in this paper. Many researchers have analyzed lateral vibration in rotor systems, which...