Optimization of Vibration Reduction Ability of Ladder Tracks by FEM Coupled with ACO

Table 1

Properties of the ladder track.

Part	Density (kg/m^3)	Elasticity modulus (N/m^2)	Poisson’s ratio
Rail	7.85 × 10^3	2.14 × 10^11	0.3
Longitudinal sleeper	2 × 10^3	5 × 10^10	0.167
Supporting platform	2.6 × 10^3	3.6 × 10^10	0.167
Connecting beam	7.85 × 10^3	2.14 × 10^10	0.3