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根据动静耦合加载切削破碎花岗岩试件的切削力信号,应用功率谱分析方法揭示了动静耦合切削破岩过程是混沌运动.在此基础上,采用关联维数定量表征了切削破岩反映出的信号特征.通过对动静耦合破岩分形特征的分析,得到了关联维数与动静耦合加载的关系,探讨了静压力与冲击能的组合对关联维数的影响.在不同动静耦合破岩过程中,关联维数与破岩比能的变化曲线极其相似.试验结果和理论分析表明:动静耦合破岩存在一个合理的静压力和冲击能的组合,可使破岩比能最小.关联维数可作为破岩比能改变的一个灵敏量,能简单、直观地辨识动静耦合参数在破岩中发挥作用的程度.为选取动静载荷的合理匹配值,有效提高破岩效果,提供了一种新的方法.
According to the dynamic force and the static load, the power spectrum analysis method is used to reveal the cutting force of the broken granite specimen. The rock breaking process of dynamic and static coupling cutting is chaotic. Based on this, the correlation dimension is used to quantitatively characterize the signals Characteristics.According to the analysis of the fractal characteristics of dynamic and static rock breaking, the relationship between the correlation dimension and static and dynamic coupling load is obtained, and the effect of the combination of static pressure and impact energy on the correlation dimension is discussed.In the process of different dynamic and static rock breaking, The correlation dimension is very similar to that of rock breaking energy.Experimental results and theoretical analysis show that there is a reasonable combination of static pressure and impact energy in rock breaking coupled with dynamic and static coupling so that the specific energy of rock breaking can be minimized.The correlation dimension can be used as Rock breaking ratio can change a sensitive amount, can be simple and intuitive to identify the dynamic and static coupling parameters play a role in breaking rock.In order to select the reasonable matching dynamic and static load value, effectively improve rock breaking effect, provides a new method .