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- W2357852042 abstract "In order to analyze effect of train-bridge interaction indicators based on different track spectra,taking German high speed low disturbance spectrum,German high speed high disturbance spectrum,and Qinhuangdao-Shenyang line track spectrum as comparative objects,the differences among three kinds of track irregularity power spectral density were analyzed,and the time samples of three kinds of spectra were obtained with the trigonometric series method.Numerical analysis of train-bridge coupled vibration was conducted with three kinds of track irregularities as external excitations.Wheel unloading rate,car-body vibration acceleration,mid-span dynamic displacement of bridge,and mid-span acceleration of bridge were selected as dynamic indicators for comparison.The results showed that the effect of shorter wavelength components of vertical profile irregularity on wheel unloading rate is obvious,and the law is similar to the variation of the power spectral density of vertical profile irregularity within a range of shorter wavelength;the car-body lateral and vertical vibration acceleration are mainly affected by longer wavelength components of alignment and vertical track irregularity respectively,and the difference between alignment and vertical irregularity power spectra reflects the difference between car-body lateral and vertical vibration acceleration;the effect of irregularity excitation on dynamic displacement of bridge is very small,and the dynamic displacements of bridge are very close to under three kinds of spectrum;the impact of track irregularity on bridge vibration acceleration is bigger,and bridge vibration accelerations under German high speed high disturbance spectrum and Qin-Shen line track spectrum are significantly larger than that under German high speed low disturbance spectrum;in addition,the impact of track irregularity on bridge lateral vibration acceleration is more obvious than that on bridge vertical vibration acceleration." @default.
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- W2357852042 date "2012-01-01" @default.
- W2357852042 modified "2023-09-23" @default.
- W2357852042 title "Comparative analysis for train-bridge interaction indicators based on different track spectra" @default.
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