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Flexible coupling joint simulation based on a high-speed railway bridge kinetics of non-ballasted turnout

Author: LiCangZuo
Tutor: GaoLiang
School: Beijing Jiaotong University
Course: Road and Railway Engineering
Keywords: High Speed ??Rail Non-ballasted track bridge Turnout Car fork bridge system Rigid Coupling Transition Dynamics
CLC: U213.6
Type: Master's thesis
Year: 2011
Downloads: 160
Quote: 1
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Abstract


To ensure that our high-speed railway line high ride , extensive use of non-ballasted track structure and the \With the large-scale construction of high-speed railway development , there have been multiple seamless switch located at the bridge . Turnout structural irregularity caused by the superposition of vibration and the vibration of the bridge , making the dynamic characteristics of the bridge turnout system complexity . Bridge with non-ballasted track turnout area range connections exist stiffness irregularity affecting stability and driving safety turnouts life. In order to study the bridge ballastless turnout system dynamics , as well as the bridge transition section Turnout dynamics , this paper analyzes based on multi -body dynamics theory and vehicles - track coupling dynamics modeling theory , through the use of commercial software SIMPACK conducted with ABAQUS co-simulation , the multibody vehicle systems coupled with flexible body rail system , the establishment of vehicle dynamics model fork bridge system . By contrast with existing studies , validation of the simulation model is reasonable for the bridge turnout system dynamics analysis provides a rapid and effective new methods. Crossing the bridge using the flexible coupling system model car from the wheel-rail interaction force , safe and stable operation of the vehicle , turnout dynamic characteristics , dynamic characteristics of the bridge structure and other aspects of the high-speed train through turnout and the turnout when the car sideways through turnout bridge system dynamics . Vehicle through the switch rail tracks and turnouts and cardiac structural shocks occur , the wheel -rail interaction force increases , turnout structures in the impact area larger vibration . After inspecting calculation , smooth vehicle safety indicators and turnouts , bridge structure deformation limit requirements are met . For the study of non-ballasted track bridge turnout area and the dynamic characteristics of the transition section interval in flexible coupling drive fork bridge system model based on the establishment of a transitional period dynamic analysis model, and driving directions , fork bridge relative position , stiffness difference , driving speed laws and other factors were calculated and analyzed . Turnout for non-ballasted bridge transition section design plan a comparative study that can be graded stiffness transition mode, and not too much progression , grading length desirable one or a few cell board as an order to facilitate construction operations.

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Turnout
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