<正> 目前确定钎杆寿命,都是通过现场考核,尚缺乏用理论预测。不同凿岩机、不同钎杆和不同岩石,对钎杆的寿命有重要影响,理论分析十分必要。凿岩实践表明,钎杆的主要失效形式是疲劳破坏。对于变幅载荷,采用谱的分析方法是一种较好的途径。
An approach was made theoretically to the load spectrum for the drill rod under striking. A source programme has been written to computer the drilling load oscillogram of a striking-penetrating system. The theoretical estimation of the fatigue life of the drill rod is carried out bY analyzing the rule and constitution of the load spectrum and its influence on the surplus life of drill rod.
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