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本文用动光弹方法对不同炮位爆炸加载产生的应力波扩展及其与裂纹相互作用进行了初步探讨,为在岩石爆破中控制裂纹的产生、扩展路径和裂纹面的形成提供了重要依据。用国产多火花型动光弹仪定性地记录了应力波扩展与裂纹及相互作用的瞬态过程。本文在数据处理时,对传统的方法作了改进,结果表明,该方法是可行的、自行编制的程序具有对初始值灵敏度低、计算速度快,迭代次数少等特点。
In this paper, the expansion of the stress wave generated by the explosion loading of different artillery positions and its interaction with cracks are preliminarily discussed using the dynamic photoelastic method, which provides an important basis for the control of crack generation, propagation path and crack surface formation in rock blasting. The transient process of stress wave propagation, crack propagation and interaction was qualitatively recorded by a domestic multi-sparking dynamic photoelastic instrument. In the data processing, this paper improves the traditional method. The result shows that this method is feasible, and the self-programming program has the characteristics of low initial value sensitivity, fast calculation speed, and few iterations.