Structure And Dynamics Analysis Of Maglev Track Laying Equipment For Medium And Low Speed Maglev Traffic

Maglev train has many advantages,such as low noise,low energy consumption,low carbon,etc.It will become a widely used new rail transit tool in the future.With the largescale construction of maglev lines,the demand for the automation equipment in the construction of maglev lines is increasing.The maglev track laying equipment emerges as the times require.The automatic track laying equipment is used for the construction of the maglev line,which can complete the tasks of carrying and laying the track.Its appearance will greatly improve the construction speed of the maglev line.This paper takes the maglev track laying equipment as the research object.Aiming at the problems of the structure and dynamics of the equipment in actual use and operation.The following studies are carried out:Firstly,the static performances of the maglev track laying equipment frame and maglev track are analyzed.The finite element models of equipment frame and maglev track are established in Workbench by using the finite element method.The static simulation analyses are carried out for each working condition.The stress and strain contour maps are obtained.The maximum values are less than the allowable values.It is proved that the equipment frame can meet the use requirements.And it will not cause damage which will affect the future use to the maglev orbit.Secondly,the dynamic model of maglev track laying equipment-track coupling system is established.The dynamic model of the whole system is analyzed.The dynamic differential equations of various motions of the system are established by using Newton-Euler method and D’Alembert’s principle.The track irregularity is described.And the deterministic model harmonic excitation is selected as the external excitation of suspension device parameter analysis.The stochastic model German high interference track irregularity power spectrum is selected.And the time-frequency conversion is carried out to obtain the time-domain model,which is used as the external excitation of system random response analysis.Thirdly,using Zhai’s method to compile the system dynamics simulation program in MATLAB.The harmonic excitation is used as the external input and the control variable method is used to analyze the influence of the parameters of the upper suspension device,the lower suspension device and the side suspension device on the vibration response of the system.The reasonable range of the parameters of each suspension device is discussed.Finally,a group of parameters are selected based on the analysis results of the suspension device parameters.Taking the German high interference time domain model as the external input.And the vibration responses of the system under two working conditions are analyzed.The results show that all kinds of vibrations are convergent.All kinds of vibrations’ range are acceptable.The maximum acceleration of the main body of the equipment is less than the specified value.The operation stability is evaluated as excellent.It shows that the selection of suspension device parameters meets the requirements.In conclusion,the structure and dynamics of the maglev track laying equipment are simulated and analyzed in this paper.The research results provide a reference for the optimization and improvement of the equipment structure,the selection of the suspension device parameters and the stability research of the equipment during operation in the future.It is of great significance for the equipment to be put into practical engineering application as soon as possible.