Model wind tunnel test device for mobile vehicles on bridges based on precision linear slide rails

Abstract

A wind tunnel test device for a mobile vehicle model on a bridge based on a precision linear slide rail, including a vehicle model, a force balance, a speed sensor, a traction system, and a bridge model supported by a bracket, and also includes a bridge model fixed on the bridge model. The precision linear slide rail on the surface, the precision linear slide rail is provided with a sliding device connected with the traction system, and the sliding device is fixed in the vehicle model; the force measuring balance is fixed on the sliding device through a force measuring bracket above; the speed sensor is set on the deck of the bridge model. The invention adopts precision linear slide rails and sliders, which can greatly reduce the vibration of the vehicle model during the moving process, and realize the high-precision and stable operation of the vehicle model, so that the force-measuring balance can more accurately test the aerodynamic force of the vehicle model , It can also test the six-component force of the vehicle under different wind directions, different wind speeds, and different vehicle speeds; the system is low in cost, simple in principle and easy to operate; it has a wide range of applications.

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

Images