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Vibration acceleration testing method and apparatus for subway center pin bolt

A technology of acceleration test and vibration test, which is applied in the direction of vibration test, measuring device, machine/structural component test, etc., and can solve difficult problems such as lateral vibration test

Pending Publication Date: 2019-09-06
CSR HANGZHOU RAIL TRANSIT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no relative displacement between the two connecting parts of the center pin bolt of the subway, but the whole vehicle is subject to random vibration during operation, so it is difficult to use lateral vibration tests to study

Method used

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  • Vibration acceleration testing method and apparatus for subway center pin bolt
  • Vibration acceleration testing method and apparatus for subway center pin bolt
  • Vibration acceleration testing method and apparatus for subway center pin bolt

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] like figure 1As shown, a subway center pin bolt vibration acceleration test device includes a vibration test fixture 2, a strain gauge 8, a data acquisition system 4, an acceleration sensor 6 and a vibration table 1. The acceleration sensor 6 is arranged on the vibration table surface 1-1 of the vibration table 1, detects the vibration acceleration of the vibration table surface, and feeds back to the vibration table control system 1-2 that comes with the vibration table, and the vibration table control system adjusts the excitation signal and outputs Provide the vibration source of the vibration table, so as to control the magnitude of the vibration test to carry out the vibration acceleration test. The shaking table adopts the DC6500-65 shaking table of Suzhou Sushi Test Group Co., Ltd. The data acquisition system transmits the axial strain data of the cushi...

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Abstract

The invention discloses a vibration acceleration testing method and apparatus for a subway center pin bolt. Two connectors of the subway center pin bolt do not make relative displacement and thus thestudy can not be performed by lateral vibration testing. According to the invention, a strain gauge is attached to a cushion block through hole; an equivalent nut is embedded in a substrate through the top of a substrate of a vibration test fixture; a cushion block is arranged at the bottom of the substrate; and a tested center pin bolt passes through the through hole of the cushion block and is connected with the equivalent nut firmly. Vibration acceleration testing is carried out by using a vibration bench; the strain gauge collects the vibration axial clamping force; and vibration test is carried out under different vibration levels. Axial strain data of the cushion block are processed to obtain a degradation equation and an acceleration equation of the tested center pin bolt. Accordingto the provided reliability appraisal test method for a subway center pin bolt, the guiding basis is provided for screening a subway center pin bolt; and a method for testing the influence of gluingon the anti-loose performance of the subway center pin bolt is also provided to the guiding basis for the anti-loose measures of the subway center pin bolt.

Description

technical field [0001] The invention belongs to the technical field of bolt vibration tests, and in particular relates to a vibration acceleration test method and device for a center pin bolt of a subway. Background technique [0002] Bolts have been widely used in subway rail transit because of their simple structure, uniform standards, and convenient installation. Since the bolt connection is affected by various factors such as the workplace, the use environment, the installation situation and the subsequent maintenance, it should be safe and reliable to the greatest extent before design and use, and a certain safety factor should be given. However, due to many influencing factors, it is still very difficult to completely avoid failure. Once the connecting parts fail, especially the connecting bolts in important parts of the system fail, serious consequences will occur. Therefore, in order to ensure the safe and orderly operation of the subway, it is very necessary to st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
CPCG01M7/022G01M7/025
Inventor 蔡洋涛潘骏吴启勇张雯何若晗魏中伟祁佳磊
Owner CSR HANGZHOU RAIL TRANSIT
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