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针对露天矿用潜孔钻机钻架在高寒大风地区工作时受冲击载荷影响易出现大幅摆动的问题,采用数值仿真方法,对某一现场使用钻机进行不同风向载荷与冲击载荷同时作用下钻架结构动力学分析,得到结构幅频响应曲线及动应力响应规律.结果表明:有风载荷作用下钻架结构的最大摆幅与最大动应力值显著提高,结构安全系数降低;幅频响应及动应力响应规律与结构动态性能关系密切;风载荷作用方向不同时钻架最大动应力作用位置不变,但最大动应力值和振幅值有明显不同;风载荷作用方向与钻机车身平行时,钻架的动应力及摆动位移最大,结构安全系数最低.
Aiming at the problem that the drill stand of opencast mine DTH drilling rigs is easily affected by the impact load when working in the alpine windy area, the numerical simulation method is used to simulate the structure of the drill frame under different wind direction loads and impact loads Dynamic response analysis and the law of amplitude-frequency response and dynamic stress response of the structure are obtained.The results show that the maximum amplitude and the maximum dynamic stress value of the frame structure under wind load increase significantly, and the structural safety factor decreases. The amplitude-frequency response and dynamic stress The response law is closely related to the dynamic performance of the structure. When the direction of wind load is different, the maximum dynamic stress position of the drill holder remains the same, but the maximum dynamic stress value and amplitude value are obviously different. When the direction of wind load is parallel to the drill body, Dynamic stress and swing displacement of the largest, the lowest structural safety factor.