Simulation method for dynamic behavior dynamic grid unbalanced force elimination of high speed railway pantograph-catenary

Abstract

The invention discloses a simulation method for dynamic behavior dynamic grid unbalanced force elimination of high speed railway pantograph-catenary. The method comprises the following steps that step1: a pantograph-catenary nonlinear simulation model is constructed according to finite elements and a multi-body dynamics method; step 2: in each simulation step time (i)t( / i), the grids around contact points on a contact line are encrypted by using a dynamic grid method; step 3: an unbalanced force in the dynamic grids is eliminated by an iterative algorithm; step 4: the response of the simulation step time (i)t( / i) is solved by a Newmark-(i) Beta (i) algorithm; step 5: the steps from 2 to 4 are repeated, until the whole contact line is traversed by a pantograph, the dynamic simulation of pantograph-catenary is completed; the simulation method for dynamic behavior dynamic grid unbalanced force elimination of the high speed railway pantograph-catenary can eliminate the unbalanced force produced by using the dynamic grid technology, is used in nonlinear finite element solution, and the solution efficiency and the solution precision are improved.

Description

technical field [0001] The invention relates to a simulation method for the dynamic behavior of the high-speed rail pantograph-catenary system, in particular to a simulation method for eliminating the unbalanced force of the dynamic mesh of the high-speed rail pantograph-catenary dynamic behavior. Background technique [0002] The high-speed railway pantograph and catenary system are responsible for transmitting electric energy for high-speed electric locomotives, and the continuous transmission of electric energy is realized through sliding contact between the pantograph and catenary; in order to study the complex dynamic behavior before the pantograph and catenary, the contact is usually constructed using the finite element method The mathematical model of the catenary, through the method of iterative solution to the dynamic response under the interaction of pantograph and catenary; however, due to the characteristics of large span and long distance of the catenary, the amo...

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Problems solved by technology

[0002] The high-speed railway pantograph and catenary system are responsible for transmitting electric energy for high-speed electric locomotives, and the continuous transmission of electric energy is realized through sliding contact between the pantograph and catenary; in order to study the complex dynamic behavior before the pantograph and catenary, the contact is usually constructed using the finite element method The mathematical model of the catenary, through the method of iterative solution to the dynamic response under the interaction of pantograph and catenary; however, due to the characteristics of large span and long distance of the catenary, the amount of calculation of the dynamic simulation of pantograph and catenary is very considerable; In order to improve the calculation efficiency of pantograph-catenary system, Jimenez-Octavio, Carnicero, Sanchez-Rebollo and Such et al proposed the moving mesh simulation technology of pantograph-catenary system. The achievement "A moving mesh method to deal with cable structures subjected to moving loads and its application to the catenary-pantograph dynamic interaction" was published in the journal "Journal of Sound and Vibration", Volume 349, pages 216-229; the core idea of ​​this method is to locally encrypt the contact near the contact point during the pantograph-catenary dynamic interaction simulation process The line grid can improve the calculation accuracy and efficiency; however, this method can only be used in the linear finite element model at present, and cannot consider the geometric nonlinearity caused by the large deformation of the contact line; when considering the geometry of the contact line When it is nonlinear, the newly generated dynamic mesh will generate a large unbalanced force, which will cause a large error and even fail to solve the problem.

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