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The mechanical model of mast of special rotary drilling rig for transmission line is established in this paper. The ultimate loads of mast of rotary drilling rig are designed for drilling condition and lifting drill condition, and the simulation of the mast is done under these typical working conditions. According to the analysis of the stress and deformation of mast, the weaknesses of mast is studied which can provide basis for the further optimization and improvement of mast structure.

Structural Analysis of Mast of Special Rotary Drilling Rig for Transmission Line