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Rail vehicle body structure large-size component fatigue test method and device

A technology for car body structure and fatigue testing, which is applied in railway vehicle testing, material analysis using radiation, etc.

Active Publication Date: 2014-07-02
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the fatigue strength test of the car body, due to the constraints of the test conditions and test technology, it has not been carried out.

Method used

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  • Rail vehicle body structure large-size component fatigue test method and device
  • Rail vehicle body structure large-size component fatigue test method and device
  • Rail vehicle body structure large-size component fatigue test method and device

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0039] Such as figure 1 As shown, the fatigue test device for large parts of rail vehicle body structure according to the present invention takes the stainless steel laser welding subway car body structure as the test object to test the fatigue strength of the weld, such as large parts such as side walls and end walls of the subway. , which can be widely used in laser-welded car body tests operating in China.

[0040] In this embodiment, the side wall 1 is used as the vehicle body structure to be tested for testing. The side wall 1 is welded by the left window column 2, the right window column 3, the upper beam of the window 4, the lower beam of the window 5, the side beam of the side wall 6, the lower beam of the side wall 7, the door column 8 and the side wall panel 9. 1 is a stainless steel material, and each weld seam is welded by laser we...

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Abstract

The invention relates to a rail vehicle body structure large-size component fatigue test method and device. A finite element model simulation technology is utilized to simulate test conditions of a vehicle body structure member to be tested under the fatigue state of the whole vehicle so that steps of test loading conditions of the vehicle body structure member to be tested are confirmed; and corresponding loads are applied to the vehicle body structure member to be tested according to the test loading conditions obtained in the last step, and fatigue strength is detected. The method combining simulation analysis and test is adopted, and welding seam fatigue strength of stainless steel vehicle body structure large-size components like a side wall is rapidly and accurately tested so that operation is simple and feasible. With application of the test technology, accurate detection data can be provided, large amounts of real and effective test data can be accumulated, and analysis and research of vehicle fatigue safety and reliability are facilitated so that powerful basis is provided for vehicle fatigue safety and reliability.

Description

technical field [0001] The invention relates to a fatigue strength test method and device, in particular to a fatigue test method and device for large parts of a rail vehicle body structure, belonging to the technical field of rail vehicle testing. Background technique [0002] With the advancement of my country's urbanization process, the demand for urban rail vehicles is also increasing. The stable operation of urban rail vehicles is the key factor for the development of urban-planned vehicles, and vehicle fatigue reliability is a strong guarantee for the stable operation of urban rail vehicles. Therefore, vehicle fatigue reliability assessment methods, as a key technology, have attracted more and more attention. [0003] Fatigue test is the basis for measuring the fatigue performance of test pieces or simulated parts subjected to alternating loads in various environments, and is the main method for researching and verifying structural fatigue performance. The fatigue tes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/08G01N23/04
Inventor 车全伟许娇田爱琴周建乐钟元木
Owner CRRC QINGDAO SIFANG CO LTD
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