Swing bolster load test structure and method

Abstract

The invention provides a swing bolster load testing structure and a testing method thereof. In the structure, a center plate dynamometric seat is processed with a center plate, and is a round blind hole; a center plate dynamometric sensor component can be placed in the center plate dynamometric seat; an upper center plate of an automobile body is placed in the center plate dynamometric seat, and is pressed above the center plate dynamometric sensor component; a pin roll passes through a lower center plate and the center plate dynamometric sensor component, and pivots the swing bolster and the automobile body; a side bearer dynamometric seat processed with on each side bearer; a side bearer dynamometric sensor is placed in the side bearer dynamometric seat; and a signal acquisition device collects signals measured by the center plate dynamometric sensor component and the side bearer dynamometric sensors. As the method acquires center plate force and offset and side bearing force of the center plate force in a mode of direct measurement, testing accuracy of the center plate force can be obviously improved, steps of load calibration in a laboratory can be reduced, period of the test job is shortened, and man power and physical resources are saved.

Description

technical field [0001] The invention relates to a bolster structure of a train. Background technique [0002] Judging from the development of truck equipment technology in my country in the past ten years, the fatigue reliability of truck structure is a key factor restricting the improvement of truck equipment technology. If the fatigue crack occurs prematurely when the structure of the truck is significantly lower than the design life, the maintenance cost of the truck will remain high and the driving safety will be seriously endangered. Because the current structural strength design specifications and test standards for freight cars are not perfect, especially the lack of fatigue strength design specifications and test standards that meet the actual operating conditions in our country. Therefore, it has become a very urgent task to test the load spectrum of trucks and update the strength design codes and test standards of truck structures in my country. [0003] In the l...

AI Technical Summary

Problems solved by technology

[0010] Although the above-mentioned existing bolster load test methods are widely used in the fatigue reliability analysis of truck structures in my country, however, test workers also found that there is a problem that the test structure is not accurate enough in the process of work. The reasons are:

[0011] 1. Since it is difficult to paste strain gauges directly on the center plate of the bolster, the load value on the center plate can only be obtained indirectly through calibration tests. The process in the middle is complicated and there must be errors

[0012] 2. Use the strain gauge to measure the stress value, and obtain the load value by solving the equation, and its measurement accuracy is much lower than that of the load cell

[0013] 3. The strain value obtained by using the strain gauge measurement requires complicated post-work to convert it into the load value we need

[0014] Due to the existence of the above factors, the truck load spectrum obtained by the existing bolster load test method is not accurate enough, and even affects the research work on the fatigue reliability of the truck structure, which has become an urgent problem for those skilled in the art.

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