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Test method for vibration energy attenuation rate of rail damper

A technology of vibration energy and test method, applied in the field of rail vibration and noise reduction, can solve the problems of cumbersome test conditions, large constraints on time and working conditions, adverse damper product performance, etc., so as to reduce the influence factor and effectively determine the Effect

Active Publication Date: 2022-01-18
BEIJING URBAN CONSTR DESIGN & DEV GRP CO +1
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Problems solved by technology

[0003] The test and calculation method of the rail vibration attenuation rate is cumbersome, subject to time and working conditions and other conditions, and it is not conducive to direct comparison and evaluation of the performance of the damper product applied to the rail

Method used

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  • Test method for vibration energy attenuation rate of rail damper
  • Test method for vibration energy attenuation rate of rail damper
  • Test method for vibration energy attenuation rate of rail damper

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Embodiment Construction

[0025] see figure 1 and figure 2 , shows the method for testing the vibration energy attenuation rate of the rail damper of the present invention.

[0026] see figure 1 , the test method of the vibration energy attenuation rate of the rail damper of the present invention is carried out on a rail with a length of 6m. The shape of the rail corresponds to the shape that the damper is intended to use. Test rails must be in good condition with no welds or obvious defects. The damper should be installed on the rail symmetrically with the center of the rail as the axis (ML), and the distance between the dampers must correspond to the actual installation distance of the rail.

[0027] see figure 2 , the rail should be so supported that it can swing freely. This can be achieved by elastic mounting at both ends with a fundamental frequency below 30Hz. Elastomeric supports must have sufficiently high internal damping so that resonances of the support have minimal influence on th...

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Abstract

A method for testing the vibration energy attenuation rate of a rail damper, comprising the following steps: Step 1: test preparation step, preparing a steel rail, a piece of highly elastic supporting elastic element and a metal support bar before the test; Step 2: testing In the installation step, the rail is placed on the top of the high elastic support elastic element, so that the rail can swing freely; Step 3: in the test step, the following values ​​are obtained: the center frequency f of the triple frequency band; the point input FRF; the distance between the impact point and the measurement point The distance is the transfer FRF of L; transfer the FRF to the measuring point distance of the impact point; step 4: calculate the attenuation rate according to the formula in each third octave band in the vertical and horizontal directions; thus, the present invention is simple and convenient Quickly and effectively overcome the defects of the prior art, and evaluate the vibration energy attenuation rate of the rail damper more objectively and accurately.

Description

technical field [0001] The invention relates to the technical field of rail vibration and noise reduction, in particular to a method for testing the vibration energy attenuation rate of a rail damper. Background technique [0002] With the rapid development of urban rail transit, the rail structure, as an important undertaking part, plays an important role in the development process of rail transit. The fast-paced development mode of the city puts forward higher requirements for rail transit, among which wheel-rail vibration and noise is the main problem it faces and needs to be solved urgently. In order to solve the problem of wheel-rail vibration and noise, many countries have done related research. At present, the rail vibration attenuation rate test and data processing are usually carried out in accordance with European standards, and the rail vibration attenuation rate is tested by the hammering method. [0003] The test and calculation method of the rail vibration at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02G01H17/00
CPCG01M7/025G01H17/00
Inventor 于百勇杨秀仁郑军李静敏王博焦雷朱禹王聚光陈天平
Owner BEIJING URBAN CONSTR DESIGN & DEV GRP CO
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