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Fatigue test method for rail transit car body welded structure

A welding structure and fatigue testing technology, applied in the field of fatigue testing, can solve problems such as difficulty in clamping and fixing, misalignment of loading stress axes, affecting the accurate evaluation of vehicle performance, etc., to ensure effectiveness and reliability, guarantee Uniformity, the effect of filling gaps in structural fatigue data

Active Publication Date: 2019-05-24
辽宁忠旺铝合金精深加工有限公司
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Problems solved by technology

[0002] Since the welding of the rail transit car body is mostly arc-shaped or other special-shaped profiles and linear profiles, it is difficult to clamp and fix, so that the actual stress center line of the welded structure does not coincide with the stress axis of the fatigue testing machine, resulting in test results. It cannot reflect the actual fatigue level of the welded structure, which affects the accurate evaluation of the vehicle performance

Method used

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  • Fatigue test method for rail transit car body welded structure
  • Fatigue test method for rail transit car body welded structure

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Embodiment Construction

[0029] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present invention, but not for limiting the protection scope of the present invention.

[0030] Such as figure 1 , 2 As shown, a fatigue test fixture of a rail transit car body welding structure of the present embodiment includes a rigid clamping end 1 and an elastic clamping end 2,

[0031] Specifically, the rigid clamping end 1 includes two arc-shaped clamping blocks 3 that are arranged in pairs and can form an occluded state for the straight vehicle body structure, and a clamp for locking and fixing the two arc-shaped clamping blocks on the straight vehicle body structure. Firmware 1 and the clamping column 14 that can be slidably arranged on the bottom of the arc clamping block, the bottom of the arc clamping block is provided with the step 11 that e...

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Abstract

The invention discloses a fatigue testing method for a rail transportation vehicle body welding structure, and belongs to the technical field of fatigue testing. The method comprises the following steps: 1, making preparations before testing: performing numerical simulation analysis to determine a load value; 2, assembling a test sample and a fixture: rigidly clamping and fixing a straight vehicle body section of the vehicle body welding structure test sample by adopting a rigid clamping end and elastically clamping and fixing an irregularly-shaped vehicle body section by adopting an elastic clamping end, to form a combined test body; 3, fixing the combined test body on a fatigue tester; 4, performing loading test according to the load value; 5, performing detection. According to the method, any shape can be effectively fixed and clamped by rigid and flexible combination, and the actual stress centerline of the welding structure is overlapped with the loading stress axis of the fatigue tester, so that the fatigue level of the rail transportation vehicle body welding structure can be accurately measured.

Description

technical field [0001] The invention belongs to the technical field of fatigue testing, and in particular relates to a fatigue testing method for a welded structure of a rail transit car body. Background technique [0002] Since the welding of the rail transit car body is mostly arc-shaped or other special-shaped profiles and linear profiles, it is difficult to clamp and fix, so that the actual stress center line of the welded structure does not coincide with the stress axis of the fatigue testing machine, resulting in test results. It cannot reflect the actual fatigue level of the welded structure, which affects the accurate evaluation of the vehicle performance. [0003] Therefore, it is urgent to design a new test method that can effectively fix and clamp arc-shaped or other special-shaped profiles and straight profiles, and can accurately measure the fatigue level of rail transit car body welded structures. Contents of the invention [0004] In view of this, the objec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/32G01N3/04
CPCG01N3/04G01N3/32G01N2203/0073G01N2203/04
Inventor 杨志勇孙巍王周冰陆宏韬黄健耿庆涛姜珊
Owner 辽宁忠旺铝合金精深加工有限公司
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