Wind tunnel test device for vehicle model moving on bridge based on precision linear slide rails

Abstract

The invention discloses a wind tunnel test device for a vehicle model moving on a bridge based on precision linear slide rails. The wind tunnel test device comprises the vehicle model, force measurement balances, speed sensors, a traction system and a bridge model supported by brackets, and further comprises the precision linear slide rails fixedly arranged on the bridge surface of the bridge model, wherein slide devices connected with the traction system are arranged on the precision linear slide rails and fixed in the vehicle model; the force measurement balances are fixed on the slide devices through force measurement brackets; the speed sensors are arranged on the bridge surface of the bridge model. The precision linear slide rails and slide blocks are adopted, so that vibration of the vehicle model in a moving process can be greatly reduced, high-precision stable traveling of the vehicle model can be realized, the force measurement balances can be enabled to more accurately test pneumatic force of the vehicle model, and six-component force under different wind directions, different wind speeds and different vehicle speeds also can be tested; the system is low in cost, simple in principle, easy to operate and very wide in application range.

Description

technical field [0001] The invention relates to the technical field of wind tunnel tests, in particular to a model wind tunnel test device for mobile vehicles on bridges based on precision linear slide rails. Background technique [0002] In order to ensure the safe operation of moving vehicles under the action of cross wind, it is necessary to test the aerodynamic characteristics of the train under the action of cross wind. During the test, the transverse wind perpendicular to the direction of the bridge is provided by the wind tunnel to act on the vehicle and the bridge. The traction control system controls the speed of the vehicle so that it moves according to the process of "acceleration-stable-deceleration", and the vehicle is tested during the smooth moving stage The six-component force on the model. In the current mobile vehicle model wind tunnel test device, due to the limitation of the processing accuracy of the test device, test instruments and traction control sy...

AI Technical Summary

Problems solved by technology

In the current mobile vehicle model wind tunnel test device, due to the limitation of the processing accuracy of the test device, test instruments and traction control system, the vehicle model inevitably has certain vibrations during the smooth movement process. When using a balance to test the vehicle model When the aerodynamic force is high, the influence of the inertial force of the vehicle model cannot be filtered, thus affecting the test accuracy

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