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Train aerodynamic force real test computing method

A calculation method and aerodynamic technology, which can be used in vehicle testing, machine/structural component testing, measuring devices, etc., to solve the problems of railway train running safety, running stability and passenger comfort, train derailment, rollover, etc.

Inactive Publication Date: 2010-02-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Strong crosswinds have a serious impact on the safety of railway trains, running stability and passenger comfort. Under the action of strong crosswinds, the lateral aerodynamic force on the train may cause the train to derail, or even cause accidents such as rollover and casualties.

Method used

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  • Train aerodynamic force real test computing method
  • Train aerodynamic force real test computing method
  • Train aerodynamic force real test computing method

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Embodiment Construction

[0037] The aerodynamic test calculation method of this vehicle is based on the actual vehicle experiment with backlight on the train line from Lanzhou to Xinjiang. It adopts the pressure-sensitive film as the pressure test element. The pressure-sensitive film is made of circular metal sheet and The copper tube is welded and processed. The diameter of the metal sheet is 30mm, and the thickness is 0.8-1mm. It is an easy-to-weld copper sheet. The metal disc has a fork along the radius direction for welding with the copper tube. The inner diameter of the copper tube is 0.8mm, the length is 50mm, one end is flattened, and the other end is closed as a blind end. Insert the flattened end of the copper tube into the fork of the metal disc, polish it after welding, then drill a small hole with a diameter of 0.6mm on the copper tube at the center of the disc to communicate with the inner hole of the copper tube, and connect the other end with a plastic soft Tube. Stick the non-porous s...

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Abstract

The invention relates to a train aerodynamic force real test computing method which comprises the following steps: arranging pressure test points on the surface of a train, forming a rectangle by every 4 pressure test points, collecting pressure test data of each pressure test point by a computer; taking the 4 pressure test points of the rectangle as a unit, computing a pressure value of the unit;performing vector summation on the pressure value of each unit, obtaining integral train aerodynamic force including aerodynamic lift, cross force and overturning moment; selecting different embankment conditions to compare train pneumatic performances and analyze train performances under different train velocities and different velocities of side winds, and performing the flow field value computation to obtain the relationship among the train aerodynamic force, train operation velocity and across wind velocity.

Description

technical field [0001] The invention belongs to the pressure distribution and testing technology of the train car body under the condition of strong side wind, and specifically relates to a vehicle aerodynamic test calculation method for providing a basis for the safety and stability evaluation of the train running under the strong wind condition . Background technique [0002] Strong crosswinds have a serious impact on the safety of railway trains, running stability, and passenger comfort. Under the action of strong crosswinds, the lateral aerodynamic force on the train may cause the train to derail, or even cause accidents such as rollover and casualties. With the increase of train running speed, this problem becomes more prominent, especially on railways passing through windy areas, train running accidents caused by strong winds occur frequently. Most of the railways in Northwest my country pass through the windy Gobi area, and the natural conditions are very harsh, espe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 梁习锋刘堂红高广军刘国伟鲁寨军周伟王前选
Owner CENT SOUTH UNIV