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本文根据对实际钻进过程钎杆应力波的大量测定,用随机分析方法,给出了小直径钎杆的工作载荷谱。由Miner的线性累积损伤原理,进行了随机载荷作用下的钎杆寿命估测,计算和实测结果基本相符。
Based on a large amount of determination of the stress wave of the drill rod in the actual drilling process, the work load spectrum of the small diameter drill rod is given by the random analysis method. According to the principle of linear cumulative damage of Miner, the life of the drill rod under random loading is estimated, and the calculation and measured results are basically consistent.