The Thermal Deformation Of Continuous Maglev Guideway And Influence On Vibration

The maglev guideway is one of the main determining factors of the traffic safety and comfort as a key component of the maglev system. The deformation of the guideway due to the atmospheric environment and the dynamic characteristics of the deformed beam while the vehicle passes are studied in this thesis.The analytical result of beam's thermal deformation primarily depends on the selection of the thermal gradient mode and the thermal design value. Different thermal gradient modes are adopted in different countries. Nowadays, the research results of thermal effect on the box girders are mainly targeted to highways and railways, but the series of the maglev box girders are very different in the thesis. The thermal action makes the guideway producing deformation, which will aggravate vibration of vehicle-guideway system. So it is necessary to do deeply research on thermal deformation and its influence on vehicle-guideway vibration.The main conclusions of the thesis are described as follows:(1) The thermal effect on Series of guideway section with different height is analysed through building the ANSYS analytical model.Study indicates that the thermal deformation of guideway increases with the height of section.(2) The thermal deformation of the continuous guideway is analysed through the thermal effect. It shows the thermal defomation of continuous maglev guideway satisfies with the requirement.(3) The coupling vibration model simulating Shanghai maglev line is built , and the dynamical character of the double-span continuous guideway is worked out by the calculational program in FORTRAN90.Analysis indicates the dynamical character of guideway in Shanghai line is in good condition at present.The vehicle-guideway interaction model considering the influence of temperature deformation in the dissertation can be referred in the guideway design.