潜孔钻机单支腿支撑平台受力分析

The mechanical analysis for the platform of down-the-hole drill sustained by one outrigger

在潜孔钻机支撑平台结构设计时,存在工况考虑相对简单、忽视误操作导致极限工况等问题.为研究不同工况下平台的危险区域,详细地对潜孔钻机单支腿支撑的平台进行受力分析,确定正常和极限工况,基于力学平衡理论和变形相容条件,建立其力学模型,利用ANSYS对平台进行静力学有限元分析,得出各个工况下平台的最大应力、变形以及局部应力集中区域.结果表明:极限工况下,平台的最大应力、变形值均超过正常工况,且该结构大部分区域处于低应力状态,具有一定的静强度,符合工况的设计要求.研究结果为平台结构的优化提供参考.

When the sustained platform of down-the-hole drill was designed, the working conditionwas simply considered and it was overlooked that wrong manipulation led to ultimate condition.In order to research the dangerous section of the platform under different working conditions, theplatform of down-the-hole drill sustained by one outrigger was analyzed minutely in mechanismand normal and ultimate conditions were defined. A mechanical model was established based ontheory of mechanical balance and deformation compatibility condition. The platform was analyzedin statics by using software ANSYS . The maximum stress value,the maximum deformation valueand part stress concentration area of the platform under each condition were revealed. The resultsindicated that the maximum stress value and the maximum deformation value under ultimate conditionwere higher than normal condition. Besides, the most part of the platform was in lowstresscondition and could find out excessive areas in strength and it met the demand of design undercondition. It provides reference for the optimization and improving of the platform structure.