| With the rapid development of the railway industry,in order to ensure the safety of railway operation,the technology upgrading of detection car is becoming more and more urgent.Detection car are divided into track inspection car and rail flaw detection car according to their specific functions.Track inspection car generally use laser detection,rail flaw detection car generally uses a test car model.Track inspection car and Rail flaw detection car are often working alone.In order to improve the efficiency of the detection car to meet the continuous development of railway requirements,In this paper,track inspection equipment and rail flaw detection equipment are installed on rotary arm type axle box positioning vehicle with traction motors.The dynamic model of the detection vehicle is established,and the suspension parameters of the detection vehicle are optimized.Without considering the installation of detection equipment,the method of Isight and SIMPACK co simulation is adopted,the preliminary optimization calculation of the dynamic parameters of the rotary arm type and double pull type axle box positioning car is carried out.Compare the 5 dynamic indexes of the rotary arm type and double pull type axle box positioning car after preliminary optimization.The rotary arm type axle box positioning car with better dynamic performance is chosen as the carrier of track inspection equipment and rail flaw detection equipment,and the detection car dynamic model is set up.Based on the detection car dynamics model,taking 11 suspension parameters as factors,5 dynamic indexes are response.Six operating conditions are designed,150 groups of sample points are designed by Optimal Latin Hypercube method in each working condition,total of 900 sets of sample points are set up,the Radial Basis Function model is established.The NSGA-II multi-objective genetic algorithm is used to optimize the Radial Basis Function mode model,and the better suspension parameters combination of the dynamic performance is obtained.After the optimization of the suspension parameters,the dynamic model of the detection car is simulated and calculated.The results show that,the results show that,according to the(GBT 17426-1998)standard,the horizontal riding index,the vertical riding index,the wheel shaft lateral force,rate of wheel load reduction and the derailment coefficient all meet the requirements. |
