Multiobjective Optimization Design for Structural Parameters of TBM Disc Cutter Rings Based on FAHP and SAMPGA

Table 6

Optimization results of structural parameters for the cutter ring.

Geological conditions	Design objective	T (mm)	θ (°)	r (mm)	f1 (m^−1)	f2 (MJ·m^3)	f3 (kN)	f4 (×10^−3h^−1)	f5
Granite	Original cutter ring	19.05	20	5	31.29	79.18	153.25	4.23	6.92
	Optimized cutter ring	16.1	10.61	7.4	26.99	74.61	133.41	4.34	5.39
	Variation (%)				−13.7	−5.7	−12.9	2.6	−22.1
Tuff	Original cutter ring	19.05	20	5	27.38	34.54	98.17	1.81	5.33
	Optimized cutter ring	21.02	15.49	5.77	19.69	35.51	101.4	1.64	4.81
	Variation (%)				−28.1	2.8	3.3	−9.4	−9.8