A method for establishing a measuring point model for measuring train aerodynamic force in windy environment and its application
A technology of model building and aerodynamic force, which is applied in the measurement of train aerodynamic force, measurement point model establishment of train aerodynamic force under wind environment, and field of force measurement point model establishment
Active Publication Date: 2021-11-09
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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[0117] 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:
[0118] 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:
[0119] 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;
[0120] 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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A method for establishing a measuring point model for measuring train aerodynamic force in a wind environment and its application, the method comprising the following steps: 1) setting a force measuring model to obtain the pressure value Psy of each force measuring point on the running train body; 2) combining the pressure value Psy calculates the test value of the aerodynamic coefficient of the train body; 3) uses the force measuring balance to measure and calculate the reference value of the aerodynamic coefficient of the train body in the wind tunnel experiment; , find out the number of rows Byxn of pre-selected arrangement of force-measuring points in the height / width direction of the vehicle body; 5) group tests according to the number of rows Byxn of pre-selected arrangement, and obtain the arrangement model Azyn-Bzyn of force-measuring points on the side / top of the vehicle body. The technical solution provided by this application establishes a standardized force-measuring point model for measuring the aerodynamic force of the train body, so that when the force-measuring point is analyzed on the train body, more accurate aerodynamic prediction results can be obtained compared with the prior art.
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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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