[Retracted] Fuzzy Algorithm Based Bionic Optimization Design of Boring Machine Column

Table 2

Summary of topology optimization data results.

Performance parameter	Column prototype	Topology optimization column	Optimization change rate (%)
Maximum stress (MPa)	5.434	3.864	−28.9%
Maximum deformation (mm)	0.162	0.126	−22.1%
Overall quality (kg)	87061	82107	−5.7%
First order mode (Hz)	21.6	23.96	+10.9%
Second order mode (Hz)	22.37	25.93	+15.9%
Third order mode (Hz)	35.81	47.7	+33.2%
Fourth order mode (Hz)	54.12	57.23	+5.75%
Fifth order mode (Hz)	61.64	62.03	+0.6
Sixth order mode (Hz)	63.17	70.96	+12.3%
Specific strength (N⋅m/kg)	0.00275	0.0041	+48.4%
Specific stiffness [MPa/(kg⋅mm)]	0.92	1.255	+36.4%