Vehicle-induced bridge transverse vibration reaction calculation method based on frequency domain method

Abstract

The invention discloses a vehicle-induced bridge transverse vibration reaction calculation method based on a frequency domain method, provides a novel railway bridge transverse vibration response determination method. Compared with a traditional time domain analysis method, the novel railway bridge transverse vibration response determination method has the advantages that a train load spectrum issubdivided into a load sequence spectrum and a bridge harmonic modal spectrum, the influence relation of transverse simple harmonic frequency, train speed, a load sequence and different load amplitudes on the spectrums is researched, and calculation is simplified theoretically; transverse vibration of an axle is directly decoupled, bogie force is simplified for wheel set transverse force, and random vibration analysis is facilitated by adopting a frequency domain algorithm according to the power spectral density of the wheel set transverse force; therefore, the method provided by the inventionis small in calculation amount and high in calculation efficiency; and based on the determined modal number, the calculation precision is relatively good.

Description

technical field [0001] The invention belongs to the technical field of lateral vibration calculation of railway bridges, and in particular relates to a method for calculating the lateral vibration response of a vehicle-induced bridge based on a frequency domain method. Background technique [0002] Traditionally, to evaluate the lateral vibration of railway bridges caused by moving vehicles through time-domain simulation methods, a detailed vehicle-rail-bridge model needs to be established, and the wheel-rail relationship is complex. This method requires a large amount of calculation and relatively low calculation efficiency. Especially when a large number of calculation examples are required for correlation analysis, it is difficult to use the analysis method of time domain simulation. For example, bridge vibration assessment on a whole high-speed railway line, probability analysis of railway bridge vibration. In addition, track irregularities are random, and the results o...

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the method for calculating the lateral vibration of a vehicle-induced bridge based on the frequency domain method provided by the present invention solves the problem of large amount of calculation and low calculation efficiency when determining the lateral vibration through the traditional time domain analysis method

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