Lightweight and High-Strength Design of an Excavator Bucket under Uncertain Loading

Table 7

Initial and optimal values of design variables.

Variable symbol	Initial value	Optimal value	Unit	Increment (%)
θ1	139	136.2	°	2.01
θ2	24	22.5	°	−6.25
θ3	9	8.2	°	−8.89
t1	35	39	mm	11.43
t2	16	17	mm	5.88
t3	14	14	mm	0
t4	25	20	mm	−20
t5	8	5	mm	−37.5
r1	372	350.5	mm	−5.78
r2	114	96.9	mm	−15
l1	270	292.7	mm	8.41
l2	546	501.2	mm	−8.21
l3	580	542.7	mm	−6.43
l4	601	645.8	mm	7.45
l5	458	461.9	mm	0.85
l6	68	60.7	mm	−10.74
l7	110	112.3	mm	2.1
l8	446	480.6	mm	7.76
l9	495	489.5	mm	−1.11
l10	263	249.1	mm	−5.29
l11	175	180.7	mm	3.26
l12	1110	1004	mm	−9.55