Dynamic Analysis of CRTS II Ballastless Track-Vehicle System Based on Moving Unit Method

On account of the influence discontinuity CRTS II ballastless track slabs and discrete support pads on high-speed rail vehicle-ballastless system, a vibration analysis calculation model track-vehicle coupling system was established basis moving unit method. The dynamic response at different travel speeds with without consideration plate discontinuities investigated. effect random process steel rails analyzed by Fourier inverse transform high low spectra China’s rail. We also generated time domain samples corresponding to three percentile spectra. results show that structure increases speed train under condition unevenness, being most significant, while slab concrete foundation decreases step compared rail; has impact vertical acceleration vehicle does not affect smoothness train; magnitude as amplitude irregularities or wavelength decreases. In 2~30 m, maximum sample increases, oscillation power curve significantly tends be smooth.