Associate professor
INTRODUCTION Various impact dynamic systems have been modelled postulating the expected drilling speed and displacement at given speeds. One of the most basic model [Fig 1(a)] that has been used involves a mass loaded with a force composed of static and harmonic components. Though the model is simple, the model also produces highly complex dynamics where the progression occurs at periodic system response. However, the stick slip phenomenon observed in this motion of the rock and the drill bit is not analyzed and therefore a more realistic model is required. The other model involves modeling the motion between the rock ...
