Analysis of the Vibration Effect of Floating Slab Track Soaked in Water Using Fluid-Solid Coupling
To provide maintenance advice regarding a scenario in which floating slab tracks are soaked in water,we established a numerical model of a submerged steel spring floating slab track vibration based on the fluid-solid coupling theory.The vibration reduction of the floating slab track with different accumulation water depths under a running train considering the track,water,and tunnel base was analyzed.The results showed that the water under the floating slab influences the vibration reduction performance.When the depth of the accumulated water was lower than the 1/2 height of the slab-side space,the effect on the vertical vibration of the tunnel increased by approximately 5 dB at a peak frequency of 63 Hz.When the water filled with the entire height of the slab side space,the vertical vibration level of the tunnel at its peak frequency of 63 Hz increased to approximately 13.4 dB,an increase of 30.7％.The insertion loss of the tunnel vibration level also increased by approximately 13.36 and 13.67 dB at 63 and 80 Hz,respectively.Therefore,when the height of the water under the floating slab was over the 1/2 height of the slab side space,which means that the vertical vibrations of the slab and tunnel at their peak value frequency were larger than 5 and 10 dB,respectively,than under normal conditions without water,maintenance work to drain away the water should be performed immediately.
urban rail transitsteel spring floating slabsoaking in waterfluid-solid couplingvibration reduction effect
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