. 2021 Aug 3;38(Suppl 5):4387–4413. doi: 10.1007/s00366-021-01442-3

Table 7.

Optimization results for TRB design

Bearing number	Rank	Optimization method	Optimum parameters									Cost
Bearing number	Rank	Optimization method	$D_{m}$ (mm)	$D_{r}$ (mm)	$l_{e}$	$Z$	$K_{D_{m i n}}$	$K_{D_{\max}}$	$ε$	$e$	$β$	$C_{d}$ (N)
30207	1	EHHO	53.8069	9.1539	13.0691	18	0.356722	0.5213	0.4974	0.0514	0.9142	62,084.4
	2	HHO	53.3063	9.6201	12.5616	17	0.361756	0.5476	0.4572	0.0101	0.8666	60,868.1
	4	WOA	56.1596	6.9678	11.9946	24	0.300363	0.5006	0.4860	0.0339	0.8010	53,606.8
	3	SCA	53.3906	9.5264	12.2235	17	0.36438	0.5359	0.4689	0.0188	0.8322	58,961.8
	5	GA [2]	56.117	6.89	13.0	23	0.3305	0.5027	0.4666	0.0699	0.9417	54,510
30306	1	EHHO	51.5299	10.4971	14.3968	15	0.371458	0.5983	0.4822	0.0393	0.9432	68,439.6
	2	HHO	52.2482	9.8508	14.0246	16	0.325396	0.6	0.5	0.0697	0.9076	65,748
	4	WOA	52.1721	10.0208	13.2669	15	0.378517	0.6	0.5	0.0256	0.95	61,105.3
	3	SCA	51.8496	10.3815	13.2908	15	0.330331	0.5463	0.4084	0.0605	0.9085	63,557.4
	5	GA [2]	54.221	7.74	14.0	20	0.3451	0.5597	0.4999	0.0699	0.9498	59,350
32207	1	EHHO	53.2245	9.0549	17.5122	18	0.397334	0.5969	0.4998	0.0556	0.9463	77,162.2
	4	HHO	55.4309	6.9632	16.9182	24	0.300001	0.5000	0.4630	0.0687	0.8663	70,135.9
	2	WOA	53.0241	9.5731	16.2293	17	0.315465	0.5536	0.4555	0.0548	0.8974	73,982.6
	3	SCA	53.2925	9.1628	16.7300	17	0.311826	0.5757	0.4844	0.0666	0.95	72,252
	5	GA [2]	54.381	7.99	16.0	20	0.3516	0.5968	0.4678	0.678	0.9204	69,810
30307	1	EHHO	58.0431	11.8241	16.0144	15	0.309913	0.5864	0.4378	0.07	0.95	84,483.3
	5	HHO	60.1575	10.1419	13.8516	18	0.367968	0.5022	0.4115	0.0574	0.9387	73,329.2
	3	WOA	60.4662	9.6153	14.6739	20	0.371041	0.5549	0.4623	0.0438	0.8433	75,411.3
	2	SCA	56.9436	12.8484	15.2605	13	0.3776	0.6	0.4	0.0688	0.95	79,927.4
	4	GA [2]	60.875	8.77	15.0	20	0.3545	0.5823	0.4853	0.0643	0.9043	74,940
32208	1	EHHO	59.7637	10.1674	17.5122	18	0.399854	0.5965	0.4987	0.0303	0.95	87,259.1
	4	HHO	60.2563	9.6762	15.6860	20	0.30076	0.5012	0.4891	0.0693	0.8020	79,052.7
	2	WOA	60.4622	9.7165	16.4699	19	0.4	0.6	0.5	0.0607	0.9498	82,458.4
	3	SCA	59.5876	10.4600	16.1836	17	0.308451	0.6	0.4	0.0479	0.9116	81,068.9
	5	GA [2]	60.800	9.06	15.0	20	0.3847	0.5988	0.4517	0.0390	0.8626	75,420

Bold values indicate the best results