Side roll load testing structure of H-shaped dynamometric framework
A technology of load testing and framework, applied in the direction of measuring force, railway vehicle testing, measuring devices, etc., to achieve the effect of ensuring decoupling accuracy and testing accuracy
Active Publication Date: 2013-06-05
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0003] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a roll load test structure of an H-type dynamometer frame to solve the problem of the dynamic relationship between the load measured by the existing test structure and the structural strain
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Embodiment Construction
[0021] First, a rough introduction to the manufacturing process of the bogie force measuring frame is as follows:
[0022] The finite element method is used to establish the dynamic finite element model of each type of frame structure, and the simulated load is applied to the frame structure, and the strain group bridge method is designed on the frame for each force system, and the high-separation load identification point of the force-measuring frame is determined. The frame structure is statically calibrated on the special calibration test bench for the multi-channel loading force-measuring frame to complete the production of the force-measuring frame.
[0023] As for the specific process and steps of finding the high-separation load identification point on the frame, it does not belong to the scope of protection claimed by the present invention, nor will it affect the public's use of the present invention for load testing, so the present invention will not repeat it.
[002...
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The invention provides a side roll load testing structure of an H-shaped dynamometric framework. The side roll load testing structure comprises a set of side roll load full bridge converter formed by a thirteenth strain gauge, a fourteenth strain gauge, a seventeenth strain gauge and an eighteenth strain gauge, the thirteenth strain gauge, the fourteenth strain gauge, the seventeenth strain gauge and the eighteenth strain gauge are identical in specification, the thirteenth strain gauge and the fourteenth strain gauge are respectively bonded on the position, on the center of a framework right side beam lower cover plate, of a side beam undersurface neutral layer, and the seventeenth strain gauge and the eighteenth strain gauge are respectively boned on the position, on the center of a framework left side beam lower cover plate, of the side beam undersurface neutral layer. According to the side roll load testing structure, the relationship between the load exerted on a framework structure and output voltage can be obtained, and the quasi-static relationship between the load exerted on the framework structure and fatigue damage key position strain of the frame structure also can be obtained at the same time, so that the problem that the load tested through a traditional direct testing method is in a dynamic relationship with the fatigue damage key position strain of the frame structure is solved.
Description
technical field [0001] This invention relates to locomotive frames, and more particularly to a structure for load testing locomotive frames. Background technique [0002] In the prior art, when analyzing the load of the locomotive bogie frame structure, the direct load test method is adopted, that is, the axle box spring and the positioning arm of the bogie are respectively made into independent load cells, and the axle box spring and the positioning arm are tested synchronously. The load-time history of the arm under actual operating conditions, and combined calculations to obtain the main load of the frame structure. Although this method has high measurement accuracy, there is a dynamic relationship between the measured load and the structural strain. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a roll load test structure of an H-type dynamometer frame to solve the problem of the dynami...
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IPC IPC(8): G01L1/22G01M17/08
Inventor 李强刘志明孙守光任尊松谢基龙
Owner BEIJING JIAOTONG UNIV