Decoupling modeling method for dynamic response analysis of high-speed railway pantograph-catenary coupling system

Abstract

The invention discloses a decoupling modeling method for dynamic response analysis of a high-speed railway pantograph-catenary coupling system. The method comprises the steps of contact network modelestablishment, pantograph model establishment, pantograph-catenary system coupling space model establishment, pantograph-catenary system decoupling space model establishment, nonlinear excitation linearization processing, exponential matrix fine algorithm and the like. A non-coupling motion equation of the high-speed pantograph-catenary system is established, an exponential matrix fine algorithm is adopted to obtain accurate expression of an equation homogeneous term solution, a linearization method is adopted to obtain linearization expression of a non-homogeneous excitation term, and therefore rapid and accurate simulation of kinetic analysis of the high-speed pantograph-catenary system is achieved. By applying the method provided by the invention, the sensitivity of high-speed pantograph-catenary system model simulation to the simulation step length can be effectively reduced, the calculated amount is reduced, the simulation time consumption is shortened, and the method has certainpracticability.

Description

technical field [0001] The invention relates to the technical field of high-speed railway catenary, in particular to a decoupling modeling method for dynamic response analysis of a high-speed railway pantograph-catenary coupling system. Background technique [0002] In the electrified railway, the EMU mainly relies on the sliding contact between the pantograph slide and the overhead catenary to realize current intake, and the contact pressure between the pantograph slide and the contact wire is a key indicator for evaluating the quality of current intake. Whether the contact pressure is stable or not is directly related to the operation safety of the EMU. If the contact pressure is too high, it will cause excessive wear of the pantograph carbon slide plate and contact wire, or cause the fatigue of catenary components to intensify, causing bow scraping accidents; if the contact pressure is too small, it will cause Electric sparks or arcing cause intensified electrical corrosi...

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Problems solved by technology

[0004]The above modeling and simulation methods can be used in the analysis of dynamic characteristics of high-speed pantograph-catenary system, but there are still the following problems: First, the dimension of the finite element method simulation matrix is ​​relatively large Second, the commonly used pantograph-catenary system dynamics solution method regards the external excitation as a linear change within a small integration step, which is highly sensitive to the integration step and requires a large amount of calculation

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