A study on wind vibration response of contact line of high-speed railway

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (6) : 6-12.

In order to study the wind vibration response of contact wire when the catenary system is under wind load, the aerodynamic parameters of contact wire with irregular section shape are calculated using CFD software—Fluent. The wind load models of contact wire and catenary are deduced based on their aerodynamic parameters. The finite element model of the catenary system is built by using MSC-MARC. Using the user subroutine of MSC-MARC, the dynamic input of the wind load is implemented. The vibration response of contact wire under wind loads with different wind speeds and attack angles are simulated. The result implies the mean displacements of contact wire vertical vibration under wind load of any attack angel considering its aerodynamic characteristics are negative. It intensifies the interaction between pantograph and contact wire. The torque coefficients of contact wire are small and can be ignored. The rapid change of lift coefficients of contact wire is one of the reasons causing contact wire galloping. The galloping of contact wire is more likely to occur at the wind attack angle of 25º.

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Abstract

In order to study the wind vibration response of contact wire when the catenary system is under wind load, the aerodynamic parameters of contact wire with irregular section shape are calculated using CFD software—Fluent. The wind load models of contact wire and catenary are deduced based on their aerodynamic parameters. The finite element model of the catenary system is built by using MSC-MARC. Using the user subroutine of MSC-MARC, the dynamic input of the wind load is implemented. The vibration response of contact wire under wind loads with different wind speeds and attack angles are simulated. The result implies the mean displacements of contact wire vertical vibration under wind load of any attack angel considering its aerodynamic characteristics are negative. It intensifies the interaction between pantograph and contact wire. The torque coefficients of contact wire are small and can be ignored. The rapid change of lift coefficients of contact wire is one of the reasons causing contact wire galloping. The galloping of contact wire is more likely to occur at the wind attack angle of 25º.

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wind load / wind vibration response / aerodynamic parameters / FEM / dynamic input / galloping

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WANG Hong-rui，LIU Zhi-gang，SONG Yang，JIANG Jing. A study on wind vibration response of contact line of high-speed railway[J]. Journal of Vibration and Shock, 2015, 34(6): 6-12

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