A Calculation Method of Rolling Frequency and Center of Swing Position of Railway Passenger Car Body

Abstract

The invention provides a method for calculating the rolling frequency and the center of gravity position of a railway passenger car body, which can obtain the structural parameters, quality parameters and suspension parameters of the target vehicle; calculate the transverse equivalent stiffness of the car body suspension system; calculate the vehicle body suspension system The vertical equivalent stiffness of the vehicle body; obtain the differential equation of the lateral free vibration of the car body; calculate the circular frequency of the lower center roll and upper center roll of the car body and the distance between the center of gravity and the center of mass of the car body, so as to complete the assembly anti-roll Calculation of torsion bar rolling frequency and center of gravity position of railway passenger car body. The present invention considers the relationship between the frequency of the lower-center roll mode and the upper-center roll mode of the vehicle body, the distance between the center of gravity and the center of mass of the vehicle body, and the stiffness of the anti-roll torsion bar, and can accurately calculate The frequency and the position of the center of gravity of the rolling mode provide an important reference for the dynamic performance and limit of the vehicle.

Description

technical field [0001] The invention belongs to the technical field of railway passenger car dynamics and limits, and in particular relates to a method for calculating the rolling frequency and center of gravity position of a railway passenger car body. Background technique [0002] In the design stage of railway passenger cars, vehicle dynamic performance and boundary problems need to be considered, which are directly related to its structural parameters, mass parameters and suspension parameters. Railway passenger cars generally adopt two-stage suspension, that is, primary suspension and secondary suspension, to ensure that the vehicle has sufficient linear motion stability, curve passing safety and ride quality, and meets the requirements of vehicle dynamic limits. Among them, the secondary suspension is mainly composed of air springs, shock absorbers and anti-roll torsion bars, and the anti-roll torsion bars are mainly used to improve the anti-overturning stability of th...

AI Technical Summary

Problems solved by technology

The torsional stiffness provided by the anti-roll torsion bar will affect the lower-center roll mode and upper-center roll mode of the car body, that is, the frequency of the two modes and the distance between the center of gravity and the center of mass of the car body and the anti-roll torsion The stiffness of the rod is directly related, but the current calculation method does not take this factor into account, and the accurate calculation of the frequency of the rolling mode and the position of the center of gravity has important reference significance for the dynamic performance and limit of the vehicle

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