Abstract: To characterize drill-string system’s dynamic reaction, the axial-torsional coupled drill-string vibration model need to be studied. The drill-string takes little consideration for the ...

• Traditional vibration-isolation models are too simple to generate accurate results. • More realistic models and associated equations lead to more-accurate vibration isolation. For a more-detailed ...

Abstract: The drill string stick-slip vibration is a intensive destructiveness torsional vibration caused by twisting vibration and down hole drag. This phenomenon can be explained that the bit is ...

The idea is simple: Protect sensitive objects from vibrating floors and foundations. So is the basic vibration-isolation system model, found in most every vibration textbook, and shown in the ...

This paper presents the analytical simulation of string with large amplitudes using the Variational Iteration Method (VIM) and Hamiltonian Approach (HA). In order to verify the precision of the ...