An evaluation method for crosswind stability index of racing car based on wind tunnel test
A technology of wind tunnel test and index evaluation, applied in aerodynamic test, vehicle test, machine/structural component test, etc., can solve the problems of low accuracy and poor adaptability, and achieve the goal of overcoming poor adaptability and accurately determining Effect
Inactive Publication Date: 2018-01-26
LIAONING UNIVERSITY OF TECHNOLOGY
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[0007] The invention designs and develops a method for evaluating the crosswind stability index of a racing car based on a wind tunnel test, overcomes the defects of poor adaptability and low accuracy in the prior art, and can efficiently and accurately determine the evaluation index of the crosswind stability of a racing car
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[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0027] The invention provides a method for evaluating the crosswind stability index of a racing car based on a wind tunnel test. The specific steps are as follows:
[0028] step one:
[0029] The racing car is placed in the wind tunnel test room, and a rotating platform that can rotate around the vertical axis is arranged in the wind tunnel test room. Four support rods are arranged on the rotating platform, respectively displacing the outer sides of the four wheels of the racing car, and the four support rods can adjust the front, rear, left, and right positions. According to the wheelbase and wheelbase of the car, adjust the positions of the four support rods so that the support rods pass through the center of the outer side of the wheel to support the car. A six-component...
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The invention discloses a racing car cross wind stability index evaluation method based on a wind tunnel test. The racing car cross wind stability index evaluation method is characterized in that step 1, a racing car is disposed on a rotating platform, which is capable of rotating around a vertical axis in a wind tunnel laboratory, and four supporting rods are used to support the racing car by centers of outer side surfaces of wheels, and six-component sensors are disposed on the supporting parts between the supporting rods and the wheels, and are used for measuring test parameters; step 2, the wind tunnel test is carried out under various working conditions; step 3, the six-component sensors are used to measure lateral displacement, yaw rate, and lateral acceleration under every working condition; step 4, the lateral displacement si, the yaw rate omega i, and the lateral acceleration alfa i, and a following formula is used to calculate the cross wind stability comprehensive evaluation index Psi i under the working condition; step 5, the cross wind stability comprehensive evaluation indexes Psi i, which are calculated under n working conditions, are weighted, and a final cross wind stability comprehensive evaluation index Psi i is acquired.
Description
technical field [0001] The invention relates to the technical field of automobile wind tunnel tests, in particular to a method for evaluating crosswind stability indexes of racing cars based on wind tunnel tests. Background technique [0002] In the study of vehicle handling stability under the action of crosswind, previous domestic studies mainly focused on civilian vehicles such as cars and trucks, while less research was done in the field of racing cars. For racing cars, however, excellent handling and stability are crucial. During high-speed driving, the racing car is often disturbed by unstable wind, which leads to poor handling stability and even safety accidents. [0003] The traditional vehicle handling stability research only considers the influence of different aerodynamic characteristics or system dynamic characteristics of the vehicle on its stability, but does not combine the two organically. Usually, starting from the force analysis of the car, using mathemat...
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IPC IPC(8): G01M9/00G01M17/007
CPCG01M9/00G01M17/007
Inventor 郑利民
Owner LIAONING UNIVERSITY OF TECHNOLOGY