Impacting response analysis on a deformed projectile using for breaking rock
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摘要: 为探索射弹破岩方法，对一种截面为“风机叶片”式的异型弹芯的撞击原理进行了系统分析，在此基础上构建了其撞击过程的一维动力学响应模型，计算获得了该弹芯的运动变化特征参数，并讨论了关键结构参数对撞击特性的影响.结果表明：该弹芯撞击过程中头、尾速度之间为线性关系，近似满足伯努利方程；同时，减少头部内倾角，增加预制刻槽数目均有利于扩大对异型弹芯对岩体的横向破岩范围.Abstract: In order to study the projectile based rock-breaking method, the impacting principle of a kind of deformed projectile with the type of fan blade was systematic analyzed. On this basis the one dimension theoretical model for the impacting process was formulated. The kinematic variable values of it were calculated and the related structural parameters were discussed. The results show that the velocity relationship between the head and the tail of this deformed projectile is approximately linear, which can be expressed by the Bernolli equation. At the same time, it is beneficial for enlarging the transverse acting range when the inner slope angle is decreased and the number of notch groove is increased.
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Key words:
- rock fragmentation /
- deformed projectile /
- impacting characteristic
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