Analysis Of Maglev Guideway Under Temperature Difference And Influence On Vibration

Maglev transit system is a non-contact system. There are strict requirements and restrictions about dynamic displacement and vibration response. The current provisions of design parameters set that the deflection of guideway under temperature difference should be less than 1/6500 of beam length. It is considered to meet requirements of operational safety and comfort. However, in actual project, this standard is hard to achieve. Whether the requirement is too strict or the guideway is not safe enough cause for concern. The deformation of maglev guideway due to extreme temperature difference and dynamic characteristics of the deformed beam while the vehicle passes are studied in this thesis.Three sections of maglev guideway under the load of temperature difference are analyzed by ANSYS in the static stage based on Shanghai maglev system. Different environments are considered. The deflection in middle beam is given and more suitable temperature gradient is found out. It is compared to the current rule. The result shows the current rule is too strict.Based on the current maglev system, a detailed coupling of maglev vehicle model is developed. The deformed guideway under extreme temperature difference is worked out as guideway irregularity. FORTRAN program is created. Four different spans of the guideway are analyzed and dynamic responses are worked out. The impact coefficient and acceleration are chosen to be compared. The basic regulations are found out. The dynamic displacement of maglev guideway is slightly higher under temperature difference load. The effect is not obvious.