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| Optimization of Suspension Parameters Based on Vehicle-Track Coupled Model for a Special Railway Vehicle |
| LI Xiao-Wei-1, ZHANG Jian-Wu-1, LU Tong-Li-1, XUE Lin-2 |
| （1School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;
2Shanghai Fire Research Institute of MPS, Shanghai 200032, China） |
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Abstract Based on the vehicletrack coupled dynamics, the vehicletrack coupled model for the roadrail fire fighting vehicle moving on the track was established and was compared with the traditional railway vehicle model. For the validation of the two models, field experiments were made. The comparisons between the experimental test results and numeral simulation results indicate that the vehicletrack coupled model is better in accordance with the reality than the traditional railway vehicle model. Based on the vehicletrack model, the unified objective function method was used for the optimization of suspension parameters. The optimization results indicate that rootmeansquare values of car body acceleration, dynamic travel of secondary suspension and wheelrail force are reduced by 626%, 542% and 681%, respectively. Consequently, the riding quality is significantly improved, the dynamic travel of secondary suspension is greatly shortened, and the influence of wheelrail dynamic interactions on the damage and deform of track structures is remarkably decreased.
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Received: 18 May 2011
Published: 30 March 2012
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