Research Article

Structure Optimization of Rib Drill Pipe Based on Gas-Solid Coupling and Orthogonal Experiment

Table 6

Result of range method.

K10.18872170.22922940.20727570.20278
K20.19716010.22081630.20167150.198267
K30.20043990.20749590.20726330.203362
K40.21474670.19055650.20491350.199039
K50.2216080.17457830.20160240.200229
k10.037744340.045845880.041445140.040556
k20.039432020.044163260.04033430.0396534
k30.040087980.041499180.041452660.0406724
k40.042949340.03811130.04098270.0398078
k50.04432160.034915660.040320480.0400458
Range0.006577260.010930220.001132180.0010190
Primary and secondary factorsBACE
Optimal solutionA5B1C1E3