Bidirectional fluid-solid coupling three-dimensional numerical simulation method for high-speed pantograph

Abstract

The invention discloses a bidirectional fluid-solid coupling three-dimensional numerical simulation method for a high-speed pantograph. The method comprises the following steps: firstly, constructinggeometric models of a fluid domain and a solid domain of the high-speed pantograph; secondly, according to the model constructed in the first step, conducting grid division on a pantograph fluid domain and a pantograph solid domain respectively; then setting material parameters, initial conditions and boundary conditions of a fluid domain and a solid domain; adding a pantograph fluid-solid coupling data exchange surface, and performing bidirectional fluid-solid coupling numerical analysis of the high-speed pantograph; and finally, obtaining a pantograph displacement cloud picture and a stresscloud picture according to a kinetic analysis result in the step 4, and obtaining an aerodynamic time-history curve of each part of the pantograph according to a hydrodynamic analysis result. On the basis of the bidirectional fluid-solid coupling theoretical model, the change of the operation posture of the pantograph under the aerodynamic force effect is considered, aerodynamic characteristic calculation and stress deformation research of the pantograph under the high-speed airflow effect are achieved through numerical simulation, and the nature of the aerodynamic characteristics of the pantograph can be reflected more objectively.

Description

technical field [0001] The invention relates to the technical field of high-speed railway pantograph aerodynamics, in particular to a two-way fluid-solid coupling three-dimensional numerical simulation method for high-speed railway pantographs. Background technique [0002] With the continuous increase of the operating speed of high-speed trains, the impact of high-speed airflow disturbance on pantograph-catenary flow is very obvious; high-speed airflow not only has a direct negative impact on drag reduction and noise reduction; The flow-induced vibration of the pantograph-catenary system makes the vertical vibration, longitudinal impact, lateral swing and panto-catenary coupling vibration more obvious; the pantograph-catenary offline is more frequent, and the flow quality deteriorates seriously, which affects the flow quality of the pantograph-catenary system and the high-speed Safety of train operation. [0003] The fluid-solid coupling relationship of the high-speed pant...

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Problems solved by technology

[0002] With the continuous increase of the operating speed of high-speed trains, the impact of high-speed airflow disturbance on pantograph-catenary flow is very obvious; high-speed airflow not only has a direct negative impact on drag reduction and noise reduction; The flow-induced vibration of the pantograph-catenary system makes the vertical vibration, longitudinal impact, lateral swing and panto-catenary coupling vibration more obvious; the pantograph-catenary offline is more frequent, and the flow quality deteriorates seriously, which affects the flow quality of the pantograph-catenary system and the high-speed Safety of train operation

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