Braking force system test structure of tread brake type force test framework and manufacturing method of test structure
A technology of tread braking and testing structure, which is applied in railway vehicle testing, measuring devices, force/torque/work measuring instruments, etc., can solve the problems such as the lack of a bogie tread braking force system test method, etc., and achieve a good quasi-static relationship. , to ensure the effect of decoupling accuracy and large response level
Pending Publication Date: 2019-12-24
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0002] For tread-braked bogies, which are widely used in rail vehicles, there is no prior art test method for this type of bogie tread-braked powertrain
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[0031] Combined with the accompanying drawings, the manufacturing method of the bogie force-measuring frame is introduced as follows:
[0032] (1) Using the finite element method to establish a finite element model of the tread-type brake force-measuring frame, apply simulated loads to the frame structure, design a strain bridge method on the frame for the braking force system, and determine the high-separation load identification point of the force-measuring frame area.
[0033] In this step (1), the specific process and steps of finding the high-separation load identification point area on the frame do 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 go into details.
[0034] The present invention can determine that: if figure 1 The typical tread brake type dynamometer frame shown has side beam one 52, side beam two 51 and two beams 53, ...
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The invention provides a braking force system test structure of a tread brake type force test framework and a manufacturing method of the test structure. Firstly high-separation-degree load recognition point areas are defined on a brake mounting seat plate of the tread brake type force test framework, a plurality of strain gauges are pasted on each area, and one strain gauge is taken from each area to form a group of full-bridge circuits so as to form multiple groups of full-bridge circuit structures; static calibration is carried out for a framework structure pasted with the strain gauges ona multi-channel loading force test framework calibration test bed, the full-bridge circuit structures are subjected to decoupling calculation one by one, and one or multiple groups of group bridge structures with the highest mutual decoupling precision are found; and finally, according to the finally determined group bridge structures, manufacturing of the force test framework is completed. By adopting the structure and the method, one or more full-bridge circuits are formed on the brake mounting seat plate of the force test framework, and by testing feedback signals of the full-bridge circuits, the purpose of testing a braking force system of a steering frame is achieved.
Description
technical field [0001] The invention relates to a structure for testing the braking force system of a tread braking force measuring frame of a rail vehicle. Background technique [0002] For the tread-braked bogies widely used in rail vehicles, in the prior art, there is no test method for this type of bogie tread-braked powertrain. Contents of the invention [0003] The object of the present invention is to provide a brake force system test structure of a tread brake type force measuring frame and its manufacturing method, by defining a high-separation load identification point area on the brake mounting seat plate of the force measuring frame, in the At least one strain gauge is pasted on each high-resolution load identification point area, and each high-resolution load identification point area takes one strain gauge to form a set of full-bridge circuits. The strain gauges on the four high-resolution load identification point areas Form one or more full-bridge circuits...
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Login to View More IPC IPC(8): G01L5/28G01M17/08
CPCG01L5/28G01M17/08
Inventor 杨广雪王曦李强刘志明
Owner BEIJING JIAOTONG UNIV