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Noise source identifying and testing method for high speed train

A high-speed EMU and testing method technology, applied in the field of rail transit, can solve the problems of inability to identify the noise source of the high-speed EMU, inability to realize vibration and noise source control and path control in the vehicle, and inability to analyze the contribution of noise sources, etc., to achieve The effect of accurate test results

Active Publication Date: 2014-03-12
CRRC QINGDAO SIFANG CO LTD
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Problems solved by technology

This noise test method can only objectively reflect the level of vehicle interior noise and vehicle radiated noise, but it cannot identify the noise sources of high-speed EMUs, cannot analyze the contribution of each noise source to vehicle interior noise, and cannot realize the level of vehicle interior vibration noise. sound source control and path control

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  • Noise source identifying and testing method for high speed train
  • Noise source identifying and testing method for high speed train
  • Noise source identifying and testing method for high speed train

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0041] like figure 1 and figure 2 As shown, a kind of high-speed EMU noise source identification test method provided by the present invention is based on the noise source, and according to the distribution and propagation characteristics of the high-speed EMU noise source, the noise source identification test of the high-speed train is divided into four tests The areas are bogie wheel-rail noise test area 1, equipment room noise test area 2, pantograph noise test area 3 and aerodynamic noise test area 4.

[0042] Among them, for the test of aerodynamic noise test area 4, the aerodynamic noise mainly comes from the interaction between the air and the surface of the high-speed train body, which is distributed on the entire surface of the high-speed train body. Quantity limitation cannot cover the entire car body surface, and because the noise ...

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Abstract

The invention relates to a noise source identifying and testing method for high speed train. The method comprising the following steps: partitioning noise sources into a steering frame wheel track noise testing area, an equipment noise testing area, a pantograph noise testing area and a pneumatic noise testing area; distributing testing points respectively according to the transmission paths of air sound and structure sound in each area; acquiring testing point data; analyzing through sound and vibration transmission paths; separating the air sound from the structure sound; calculating the contribution of each noise source to interior noise. According to the noise source identifying and testing method, sound sources and vibration sources causing interior noise of the high speed train can be identified, the contribution of each noise source and each vibration source to the interior noise is determined, sound source control and path control of the interior noise are realized fundamentally, and a scientific basis is laid for the vibration and noise reduction structural design of the high speed train.

Description

technical field [0001] The invention relates to a noise source testing method, in particular to a high-speed EMU noise source identification testing method, which belongs to the technical field of rail transit. Background technique [0002] At present, the noise test of high-speed EMUs mainly evaluates the noise level in the car. Generally, a standard point of sitting posture is arranged at a distance of 1.2m from the floor surface in the seat area of ​​the car, and is arranged at a distance of 1.6m from the floor surface in the passing platform and aisle area. A standard point of standing posture; the test outside the vehicle tests the standard points 25m and 7.5m away from the center of the track respectively. This noise test method can only objectively reflect the level of vehicle interior noise and vehicle radiated noise, but it cannot identify the noise sources of high-speed EMUs, cannot analyze the contribution of each noise source to vehicle interior noise, and cannot...

Claims

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Application Information

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IPC IPC(8): G01H17/00
Inventor 赵艳菊邓小军刘韶庆帅仁忠孙召进郭建强徐跃李斌朱雷威龚明
Owner CRRC QINGDAO SIFANG CO LTD
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