Bogie suspension parameter rapid optimization method

Abstract

The invention provides a bogie suspension parameter rapid optimization method, and relates to the technical field of suspension parameter optimization design of rolling stock. The method comprises thefollowing steps of establishing a vehicle dynamics simulation model; carrying out suspension parameter optimization analysis, determining an input variable, a value range and an output evaluation index required by the model, establishing a joint simulation module for vehicle dynamics, and setting a population size n, a crossover probability Pc, a variation probability Pm and an iteration frequency N by adopting a multi-objective optimization algorithm; performing characteristic value simulation calculation on the vehicle dynamics model according to the optimization target, and extracting an optimization target value obtained by simulation through a joint simulation interface; taking an output evaluation index value which is subjected to simulation optimization and meets an evaluation index range for the first time as Pareto leading edge data; and finally, enabling the optimized data to be processed to obtain K representative suspension parameter set categories, the categories meetingthe design requirements are selected from the K representative suspension parameter set categories, and the corresponding parameter sets are optimized bogie suspension parameters.

Description

technical field [0001] The invention relates to the technical field of optimization design of suspension parameters of rolling stock. Background technique [0002] The stability of lateral snaking motion is one of the most concerned issues in the design of wheel-rail train bogies. The primary and secondary suspensions of the bogies, especially the suspension parameters in the horizontal direction, play an important role in improving the lateral stability of the train bogie and taking into account other performances of the train. to the key role. Reasonable suspension parameter matching is conducive to improving the lateral stability of the train and resisting the influence of suspension parameters and wheel-rail contact parameters on system stability (called system robustness). Therefore, the research on the optimization of bogie suspension parameter matching is very important for train design. [0003] For complex train suspension systems, except for the secondary horizon...

AI Technical Summary

Problems solved by technology

The indicators are all obtained under the assumption that the suspension parameters of the train and the wheel-rail contact parameters are constant, and the influence of the perturbation of the bogie suspension parameters and the wheel-rail contact parameters on the dynamic performance of the train is ignored.

However, in the manufacture and actual operation of the vehicle, there are large disturbances in these two parameters, and it will have a great impact on the safety of train operation.

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