Noise test method using train scale model device for aerodynamic noise wind tunnel test

Abstract

The invention relates to a train reduced scale model device for aerodynamic noise wind tunnel test and a noise test method of the train reduced scale model device, and belongs to the technical field of high-speed train aerodynamic noise test. The device comprises a lower-end fully-closed base, a reduced scale model vehicle body, a plurality of reduced scale passage connection parts, a reduced scale rail, a reduced scale pantograph, a pantograph reduced scale diversion cover, a plurality of reduced scale steering racks and a reduced scale wheel set thereof, wherein the lower-end fully-closed base is used for a detachable reduced scale vehicle body, the reduced scale model vehicle body is provided with a reduced scale cowcatcher and is not provided with a steering rack, and the reduced scalemodel vehicle body and a sub-structure to which the reduced scale model vehicle body belongs are one eighth of sizes of a corresponding true vehicle to be tested and the rail. With regard to the characteristics of a high-speed train model and a noise source position, different model structures are designed to process different noise sources, a free field sensor and sensor array equipment for voice source identification are arranged outside a flow field and are used for acquiring voice radiation information of a model noise source on the outside and information of the noise sources, the main noise source characteristics on the model are analyzed, and the problem of noise contribution of the noise source to the whole model is analyzed.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic noise testing of high-speed trains, and in particular relates to a noise test method using a scaled-scale train model device for aerodynamic noise wind tunnel testing. Background technique [0002] Such as figure 2 As shown, the car body of a high-speed train includes three parts: the leading car A, the middle car B and the tail car C. The structure of the tail car C is usually a mirror image of the structure of the head car A, and the three parts are connected by multiple through passages. The parts 4 are connected to each other. The front and rear ends of the lower parts of the head car A, the middle car B and the tail car C are provided with a bogie center pin docking port, and each bogie center pin docking port passes through a corresponding bogie center pin docking port. The bogie and its wheelset 5 are connected to the track. The front end of the driver's cab of the head car A is equip...

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Problems solved by technology

[0010] In order to solve the existing measurement results of wind tunnel tests for high-speed trains, it is impossible to obtain the proportion of the noise at the position of the obstacle remover and the position of the joint of the through passage in the overall noise of the car body, and it is also impossible to obtain the bogie and its wheelset separately. The proportion of the noise component of the position in the overall noise of the vehicle body, and the proportion of the noise component of the pantograph and its shroud in the overall noise of the vehicle body cannot be obtained separately; and according to the real aerodynamic noise The plan to manufacture an aeroacoustic wind tunnel test platform that is sufficient to accommodate real trains is a technical problem that cannot be implemented because of its high cost. The present invention provides a method for performing noise tests using a train scale model device for aerodynamic noise wind tunnel tests

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