대형 로타리 드릴링 리그의 마스트 부 유한요소 해석

Rotary drilling rigs, general construction equipment, are widely used for deeply drilling ground as foundation of public works. When using a drilling rig, an electric rotary drive supplies drilling power, and a large external torque is exerted to the mast of the drilling rig. In this study, structure analysis on the mast is carried out for developing a localized 250kN.m-type rotary drilling rig. Here, the elevation of the rotary drive is changed according to the geological construction environment. Through the analysis, the stresses of the mast structure under the maximum drilling torque are found, also the allowable torques at various elevations of the rotary drive are evaluated. Finally, the suitability of the mast design is examined from the analysis results.