A method for overturning risk assessment of high-speed trains based on spectrum analysis

Abstract

The invention discloses a high-speed train overturning risk evaluation method based on spectral analysis. Relative to a fluctuating wind spectrum calculation method of a mobile train, a train admittance function identification method, an unsteady aerodynamic force calculation method of the mobile train and a train response frequency domain calculation and overturning probability evaluation method,the fluctuating wind spectrum calculation method of the mobile train solves the problem of calculating the train wind spectrums under different speed and running directions based on ground wind spectrum; the train admittance function identification method identifies admittance functions related to fluctuating wind of different wind directions; the unsteady aerodynamic force calculation method ofthe mobile train simultaneously considers the contribution of along-wind, cross-wind and vertical fluctuating wind; and the train response frequency domain calculation and overturning probability evaluation method defines the probability distribution of train extreme response and quantifies the occurrence probability of train overturning. The high-speed train overturning risk evaluation method based on the spectral analysis provided by the invention calculates a PCWC (Probabilistic Characteristic Wind Curve) under different overturning probabilities, and evaluates the train operation safety under strong wind action.

Description

technical field [0001] The invention belongs to the field of high-speed train operation safety analysis, in particular to a high-speed train overturning risk evaluation method based on frequency spectrum analysis. Background technique [0002] In the past ten years, high-speed trains have developed rapidly all over the world due to their fast running speed, large transport capacity, high safety, high punctuality, high comfort, energy saving, and environmental protection. China's high-speed railway construction is even more At the world leading level. However, high-speed trains often run in areas with complex and changeable wind environments such as crossing rivers, crossing seas, high embankments, high mountains and canyons, and gale Gobi. Under the action of strong wind, the car body will generate a rolling moment around the track on the leeward side, which will lead to load reduction of the wheel set on the windward side, directly increasing the overturning risk of the tr...

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Problems solved by technology

The train response analysis is usually carried out in the time domain. It is necessary to discretize the continuous fluctuating wind field along the line into wind fields at finite points. is difficult to complete

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