Fitness Estimation Based Particle Swarm Optimization Algorithm for Layout Design of Truss Structures

Table 6

Comparison of optimized designs found for the spatial 25-bar truss.

No.	Variable	FA [15]	FM-GA [16]	PSO [17]	CPSO [17]	SCPSO [17]	FEPSO-AP
1		0.1	0.1	0.1	0.3	0.1	0.1
2		0.1	0.1	0.1	0.1	0.1	0.1
3		0.9	1.1	1.1	1.0	1.0	1.0
4		0.1	0.1	0.1	0.1	0.1	0.1
5		0.1	0.1	0.4	0.1	0.1	0.1
6		0.1	0.1	0.1	0.1	0.1	0.1
7		0.1	0.2	0.4	0.2	0.1	0.1
8		1.0	0.8	0.7	0.9	0.9	0.9
9		37.3200	33.0487	27.6169	33.4976	36.9520	36.8958
10		55.7400	53.5663	51.6196	62.3735	54.5786	54.1337
11		126.6200	129.9092	129.9071	114.5945	129.9758	130.0000
12		50.1400	43.7826	42.5526	40.0531	51.7317	51.9924
13		136.4000	136.8381	132.7241	133.6695	139.5316	140.0000
Best weight (lb)		118.83	120.1149	129.2076	123.5403	117.2271	117.3022
Maximum displacement (in.)		0.3500	0.3500	0.3503	0.3505	0.3518	0.3500
Maximum stress (ksi)		18.8302	17.1574	16.4391	15.5913	19.9702	20.0182
Minimum stress (ksi)		−9.4017	−6.4822	−10.9931	−6.4102	−9.4049	−9.4024
Number of structural analyses		6,000	10,000	4,500	4,500	4,500	4,500