Method for establishing measuring point model for measuring train aerodynamic force in wind environment and application
A model building, aerodynamic technology, applied in aerodynamic tests, measuring devices, testing of machine/structural components, etc.
Active Publication Date: 2020-10-27
CENT SOUTH UNIV
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[0006] As mentioned above, although the pressure integration method has been used in some experiments, how far is the result of this indirect measurement method from the actual result, and what kind of measuring point arrangement can best reflect the real gas For power and moment, if a reliable train force-measuring point model can be provided, the accuracy of the aerodynamic force obtained by using the model to arrange the force-measuring device is high
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[0118] According to a second embodiment of the present invention, a method for establishing a measuring point model for measuring train aerodynamic force under a wind environment is provided:
[0119] A method for establishing a measuring point model for measuring the aerodynamic force of a train in a wind environment (a method for establishing a measuring point model for measuring the aerodynamic force of a train head), comprising the following steps:
[0120] S1) According to the Azyn-Bzyn arrangement model of force-measuring points on the side / top surface of the vehicle body obtained in the first embodiment, the optimal average length of each column on the train body is obtained under the condition that the force-measuring points of the train body are arranged with the optimal number of rows Azyn A zy;
[0121] S2) with the optimal average column length l obtained in step S1) A zy as a reference, the optimal arrangement number A′zyn of the force-measuring points in the len...
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The invention relates to a method for establishing a measuring point model for measuring train aerodynamic force in a wind environment and application. The method comprises the following steps of: 1)setting a force measuring model, and obtaining a pressure value Psy of each force measuring point on the body of a running train; 2) calculating to obtain a train body aerodynamic coefficient test value on the basis of the pressure value Psy; 3) measuring and calculating to obtain a train body aerodynamic coefficient reference value of a wind tunnel test by using a force measuring balance; 4) preliminarily appointing the preliminary arrangement column number of the force measuring points in the length direction of the body as Acbn, and exploring to obtain the pre-selected arrangement row number Byxn of the force measuring points in the height / width direction of the body; and 5) performing grouping test according to the pre-selected arrangement row number Byxn, and exploring to obtain a body side surface / top surface force measuring point arrangement model Azyn-Bzyn. According to the method of the technical schemes provided by the invention, the standardized force measuring point model for measuring the aerodynamic force of the train body is established, so that an aerodynamic force prediction result which is more accurate than that in the prior art is obtained when force measuring point analysis is carried out on the train body.
Description
technical field [0001] The invention relates to a method for establishing a force-measuring point model, in particular to a method for establishing a measuring point model for measuring the aerodynamic force of a train in a wind environment (a method for establishing a force-measuring point model for measuring the aerodynamic force of a train body), and belongs to the technical field of high-speed trains; the present invention It also relates to a method for establishing a measuring point model for measuring train aerodynamic force in a windy environment (a method for establishing a force measuring point model for measuring train front aerodynamic force); the invention also relates to a method for measuring train aerodynamic force. Background technique [0002] There are different ways to measure the aerodynamic force of the train under different experimental conditions. For wind tunnel tests, the train model is fixed, and a six-component force balance is usually used to dire...
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Login to View More IPC IPC(8): G01M17/08G01M9/08
CPCG01M9/08G01M17/08
Inventor 刘堂红高广军陈争卫梁习锋熊小慧张洁刘宏康王田天霍小帅高鸿瑞
Owner CENT SOUTH UNIV