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

Table 8

Comparison of optimized designs found for the planar 37-bar truss.

No.	Variable	OC [9]	GA [18]	PSO [19]	RO [20]	FEPSO-AP
1		3.2508	2.8932	2.6797	3.0124	3.4197
2		1.2364	1.1201	1.1568	1.0623	0.9766
3		1.0000	1.0000	2.3476	1.0005	0.8313
4		2.5386	1.8655	1.7182	2.2647	2.8073
5		1.3714	1.5962	1.2751	1.6339	1.2997
6		1.3681	1.2642	1.4819	1.6717	1.6483
7		2.4290	1.8254	4.6850	2.0591	2.4972
8		1.6522	2.0009	1.1246	1.6607	1.5379
9		1.8257	1.9526	2.1214	1.4941	1.7590
10		2.3022	1.9705	3.8600	2.4737	2.7069
11		1.3103	1.8294	2.9817	1.5260	1.3046
12		1.4067	1.2358	1.2021	1.4823	1.4004
13		2.1896	1.4049	1.2563	2.4148	3.0476
14		1.0000	1.0000	3.3276	1.0034	0.5947
15		1.2086	1.1998	0.9637	1.0010	0.8756
16		1.5788	1.6553	1.3978	1.3909	1.2546
17		1.6719	1.9652	1.5929	1.5893	1.4446
18		1.7703	2.0737	1.8812	1.7507	1.5889
19		1.8502	2.3050	2.0856	1.8336	1.6480
Natural frequencies (Hz)		20.0850	20.0013	20.0001	20.056	20.020
		42.0743	40.0305	40.0003	40.035	40.022
		62.9383	60.0000	60.0001	60.030	60.233
		74.4539	73.0444	73.0440	74.387	72.137
		90.0576	89.8244	89.8240	85.929	84.065
Best weight (kg)		366.50	368.84	377.20	364.04	362.8812
Number of structural analyses		—	—	20,000	32,000	8,000