| The ballastless track is a new direction for high-speed railway. With the rapid development of passenger dedicated line in China, it is necessary to study the dynamic performance and maintainence of more new ballastless tracks. This thesis, taking the slab ballastless track for example, forcuses on the dynamic performance and maintainence of ballastless track of passenger dedicated line in China. The main works of the thesis are as follows.1. The various ballastless tracks all of the world are generally summarized by consulting a lot of bibliographical information.2. The analysis model of vertical vibration of the slab ballastless track structure is established according to the method of lateral finite strip and slab segment element.3. On the basis of analysis models of vertical vibration of the slab ballastless track structure and the high-speed train, the vertical vibration equation set of the high-speed train and slab ballastless track system is established by the principle of the total potential energy with stationary value in the elastic system dynamics and the 'Set-in-right-position' rule for formulating system matrixes. The equation set is then solved by Wilson-0 step-in-step integration method.4. The vertical vibration responses of the system are calculated. The comparison between the static and dynamic results is made. Both the caculated waveforms and values is in accord with the physic concept. All of these demonstrate the correctness and feasibility of the dynamic analysis model of the slab ballastess track.5. The effect of parameters of the slab ballastless track on the vertical vibration responses of the system is analyzed and the rational parameter ranges for the slab ballastless track design are obtained.6. In the end, the maintainence methods for ballastless track structures of other countries in world are introduced. The counter- measures for maintainence of ballastless track of passenger dedicated line in China are also discussed. |
PDF Full Text Request