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

Table 3

Comparison of optimized designs found for the planar 15-bar truss.

No.	Variable	FA [15]	FM-GA [16]	PSO [17]	CPSO [17]	SCPSO [17]	FEPSO-AP
1		0.954	1.081	0.954	1.174	0.954	1.081
2		0.539	0.539	1.081	0.539	0.539	0.539
3		0.220	0.287	0.270	0.347	0.270	0.270
4		0.954	0.954	1.081	0.954	0.954	0.954
5		0.539	0.539	0.539	0.954	0.539	0.539
6		0.220	0.141	0.287	0.141	0.174	0.111
7		0.111	0.111	0.141	0.141	0.111	0.111
8		0.111	0.111	0.111	0.111	0.111	0.111
9		0.287	0.539	0.347	1.174	0.287	0.347
10		0.440	0.440	0.440	0.141	0.347	0.347
11		0.440	0.539	0.270	0.440	0.347	0.440
12		0.220	0.270	0.111	0.440	0.220	0.287
13		0.220	0.220	0.347	0.141	0.220	0.287
14		0.270	0.141	0.440	0.141	0.174	0.111
15		0.220	0.287	0.220	0.347	0.270	0.270
16		114.9670	101.5775	106.052	102.287	137.222	100.009
17		247.0400	227.9112	239.025	240.505	259.909	248.078
18		125.9190	134.7986	130.356	112.584	123.501	131.524
19		111.0670	128.2206	114.273	108.043	110.002	123.211
20		58.2980	54.8630	51.987	57.795	59.936	54.077
21		−17.5640	−16.4484	1.814	−6.430	−5.180	−9.039
22		−5.8210	−13.3007	9.183	−1.801	4.219	−14.905
23		31.4650	54.8572	46.909	57.799	57.883	54.084
Best weight (lb)		75.5473	76.6854	82.2344	77.6153	72.6153	74.1673
Maximum displacement (in.)		24.9993	24.9992	24.9999	24.9909	24.9912	24.9999
Number of structural analyses		8,000	8,000	4,500	4,500	4,500	4,000