Dynamic Simulation and Testing Research of Prefabricated Rubber Spring Floating Slab Track Bed
The prefabricated rubber spring floating slab track bed is mostly produced in factories and transported to the site for assembly,offering advantages such as reliable quality and easy replacement.To enhance the theoretical analysis and testing research on prefabricated rubber spring floating slab track beds,a vehicle-rail-floating slab rigid-flexible coupling model was established based on the Shenzhen Metro Line 6 extension project.The model was used to analyze the safety and stability of train operation,the smoothness of stiffness transition,and the vibration reduction effect,followed by on-site testing.The results show that,according to dynamic simulations,the safety and stability indicators of the train meet the specification requirements under the designed maximum operating speed of 120 km/h.The maximum rail displacement in the normal stiffness section is 3.4 mm,and the rail displacement variation rates in the stiffness transition sections before and after are 0.09 mm/m and 0.11 mm/m respectively,which meet the limit requirements.On-site tests indicated that the actual vibration reduction effect of the prefabricated rubber spring floating slab track bed used in the project is 17.2 dB,which meet the special vibration reduction requirements.
urban rail transitprefabricated slabrubber spring floating slabdynamicsfield test
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