The present research studies the vibration and bifurcation analysis of a spinning rotor-disk-
bearing system to carefully scrutinize the dynamic stability under extrinsic mass unbalance …

In this paper, nonlinear vibration of a simply supported rotating shaft with nonlinear
curvature and gyroscopic effect under transversely electromagnetic load is investigated. It is …

A rotating flexible cantilever shaft is modeled with unstressed initial deformation under
several parametric excitations, including fluctuant speed, axial force, torque and nonlinear …

In the view of fluid-structure interactions and rotor dynamics, this paper models the lateral
vibration of a vertical downward rotating elastic drill string conveying mud subjected to …

For improving the accuracy of wellbore trajectory prediction in complex wellbore structures,
especially in the kick-off section, a longitudinal, torsional and radial coupled drill string …

This paper presents a theoretical and experimental analysis of a coupled lateral and
torsional vibrations of two identical rotors interconnected by a flexible Hooke's joint and …

The non-linear wave model of torsion pendulum is elaborated with the aim to simulate
bifurcations of auto-oscillations of superdeep drill strings (DSs). The constitutive differential …

This article studies the problem of wirl vibrations of a rotating drill string bit under conditions
of its friction interaction with the bore-hole bottom surface at the wandering contact point …

The presented work examines the stability of general rotors subject to harmonic follower
force. The examined rotor consists of asymmetric Timoshenko shaft carrying asymmetric …

Parametric instability condition is an important consideration in design process as it can
cause failure in machine elements. In this study, parametric instability behaviour was studied …