Pantograph unsteady characteristic analysis method based on sliding plate spacing

Abstract

The invention discloses a pantograph unsteady characteristic analysis method based on sliding plate spacing. The pantograph unsteady characteristic analysis method comprises the following steps: step1, constructing a high-speed pantograph aerodynamic model; step 2, constructing a high-speed pantograph three-dimensional entity calculation model according to the model constructed in the step 1; Selecting a calculation area and carrying out grid division; Step 3, setting a sliding plate spacing calculation working condition, and importing the grid file divided in the step 2 into Fluent for simulation calculation; 4, obtaining a velocity contour map of the bow head center cross section and the bow head support cross section and a resistance time history curve and a lift force time history curve of a front sliding plate and a rear sliding plate of the pantograph under different sliding plate intervals according to the solving results in the step 3, and completing analysis of the unsteady characteristics of the pantograph; According to the method, time domain and frequency domain analysis is carried out on aerodynamic forces with different slide plate distances, a basis is provided forpantograph slide plate distance selection, the pantograph operation aerodynamic characteristic condition is improved, and disturbance of high-speed airflow to pantograph net current collection is reduced.

Description

technical field [0001] The invention relates to the field of high-speed railway pantograph aerodynamics, in particular to an analysis method for the unsteady characteristics of the pantograph based on the distance between slide plates. 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; the research results show that the aerodynamic resistance of the pantograph accounts for 7% to 14% of the aerodynamic resistance of the whole train. The noise has a direct negative impact; at the same time, the aerodynamic lift and aerodynamic lateral force generated by it will cause the flow-induced vibration of the structure, making the vertical vibration, longitudinal impact, lateral swing and pantograph-catenary coupling vibration more obvious; the offline pantograph-catenary More frequently, the flow quality deteriorates seriously, which affects th...

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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; the research results show that the aerodynamic resistance of the pantograph accounts for 7% to 14% of the aerodynamic resistance of the whole train. The noise has a direct negative impact; at the same time, the aerodynamic lift and aerodynamic lateral force generated by it will cause the flow-induced vibration of the structure, making the vertical vibration, longitudinal impact, lateral swing and pantograph-catenary coupling vibration more obvious; the offline pantograph-catenary More frequently, the flow quality deteriorates seriously, which affects the flow quality of the pantograph-catenary system and the safety of high-speed train operation. The operation and maintenance of the pantograph-catenary system will face increasing challenges

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