Research on vibration characteristics of rotary drilling rig's drill pipe
In this article,in order to explore the drill pipe's forced vibration when the rotary drilling rig is completing the task of rock drilling,the IS-DYNA software is used to solve the dynamic loads in three directions;the drill pipe's forced vibra-tion is analyzed in the ANSYS software when all the four pipes are extended.Then,the simulation results are tested and verified.It is shown that in the process of rock drilling,the axial dynamic load exerted on the rotary drilling rig's drill pipe,which is the largest among the dynamic loads in three directions,varies periodically.Besides,the drill pipe's vibration is mainly lateral;the long-term vibration makes the drill pipe's pressurized contact surface full of wear,and the deteriorating force conditions cause damage to the drill pipe.According to these results,some advice is proposed for the drill pipe's structure design.
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