Method for estimating aerodynamic force of motor train unit

A technology of aerodynamics and EMUs, applied in the field of estimation, can solve problems such as low speed, difficult direct measurement of train aerodynamics, high Reynolds number, etc., and achieve the effect of improving estimation accuracy

Inactive Publication Date: 2016-03-30
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

Compared with the wind tunnel test method, the line test and the dynamic model test can better reflect the real flow field around the train. When these two test methods are used to study the aerodynamics of the train, the pressure on the surface of the car body can be directly measured by the sensor. It is difficult to directly measure the aerodynamic force on the train. The dynamic model test can solve this problem by designing a mobile balance. However, the design of the mobile balance is technically difficult and expensive. Test technology; for line tests, it is difficult to directly measure the six-component aer...

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  • Method for estimating aerodynamic force of motor train unit
  • Method for estimating aerodynamic force of motor train unit
  • Method for estimating aerodynamic force of motor train unit

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0027] A kind of EMU aerodynamic estimation method of the present invention is mainly aimed at the aerodynamic estimation method of EMU circuit test and dynamic model test, and specific method is as follows:

[0028] Determine the carriage that needs to be estimated for aerodynamic force and the key components installed on the carriage, and give the running speed and operating environment of the train, such as open-line operation, tunnel operation, etc. Key components mainly refer to bogie, windshield and pantograph.

[0029] According to the optimal control point obtained by the radial basis function interpolation method, multiple pressure test points are set at the corresponding positions on the carriage, and the pressure of each point is measured under the specified operating conditions and environment.

[0030] The radial basis function int...

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Abstract

The present invention discloses a method for estimating an aerodynamic force of a motor train unit. The method comprises: setting a plurality of pressure measurement points on a carriage; measuring a pressure of each pressure measurement point; obtaining carriage surface pressure distribution by using a radial basis function interpolation method; and then obtaining an aerodynamic differential pressure force of the carriage by adopting a numerical integration method. The present invention can be used for a track test and a dynamic model test of the motor train unit. Due to adoption of the radial basis function interpolation technology, the carriage surface pressure distribution can be obtained quickly according to a small number of pressure measurement points and accuracy of estimating the aerodynamic force is improved. Moreover, surface friction and the aerodynamic force of a key component are introduced for correction, so that estimation accuracy is further enhanced.

Description

technical field [0001] The invention relates to an estimating method, in particular to an estimating method for the aerodynamic force of an EMU. Background technique [0002] The research methods of high-speed train aerodynamics mainly include line test, wind tunnel test, dynamic model test and numerical calculation method, and the research content mainly focuses on the pressure on the surface of the car body and the aerodynamic force on the train. Compared with the wind tunnel test method, the line test and the dynamic model test can better reflect the real flow field around the train. When these two test methods are used to study the aerodynamics of the train, the pressure on the surface of the car body can be directly measured by the sensor. The test data is obtained by measurement, but the aerodynamic force on the train is difficult to measure directly. The dynamic model test can solve this problem by designing a mobile balance, but the design of the mobile balance is te...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 姚拴宝陈大伟林鹏韩运动刘韶庆
Owner CRRC QINGDAO SIFANG CO LTD
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