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Shock and Vibration
Volume 2015, Article ID 484827, 6 pages
http://dx.doi.org/10.1155/2015/484827
Research Article

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

1Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China
2School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China

Received 28 March 2015; Revised 25 May 2015; Accepted 10 June 2015

Academic Editor: Georges Kouroussis

Copyright © 2015 Hao Jin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ladder track, which has drawn increased attention in scientific communities, is an effective method for reducing vibrations from underground railways. In order to optimize the vibration reduction ability of ladder track, a new method, that is, the finite element method (FEM) coupled with ant colony optimization (ACO), has been proposed in this paper. We describe how to build the FEM model verified by the vibration tests in the Track Vibration Abatement and Control Laboratory and how to couple the FEM with ACO. The density and elasticity modulus of the sleeper pad are optimized using this method. After optimization, the vibration acceleration level of the supporting platform in the 1–200 Hz range was reduced from 102.8 dB to 94.4 dB. The optimized density of the sleeper pad is 620 kg/m3, and the optimized elasticity modulus of the sleeper pad is 6.25 × 106 N/m2.