Vertical Suspension Optimization for a High-Speed Train with PSO Intelligent Method

Table 5

The RMS of train body vertical acceleration (m/s²) and improvement (%).

Layouts		Speeds
		300 km/h	350 km/h	380 km/h
S1	J1	0.0277	0.0299	0.0307
S2	J1	0.0186	0.0195	0.0199
	Impro.	32.70%	34.69%	35.24%
S3	J1	0.0130	0.0142	0.0147
	Impro.	53.09%	52.54%	52.00%
S4	J1	0.0184	0.0190	0.0204
	Impro.	33.61%	36.53%	33.60%
S5	J1	0.0223	0.0233	0.0237
	Impro.	19.40%	22.19%	22.74%