Simple detection method for ratio of dynamic stiffness to static stiffness of sleeper cushion

Abstract

The invention discloses a simple test method for the dynamic and static stiffness ratio of a sleeper cushion, and belongs to the technical field of detection. The method for rapidly detecting the dynamic and static stiffness of the sleeper pad comprises the following steps: preparing a sample, enabling the structure of the sample to be consistent with that of the sleeper pad, reducing the size in the direction vertical to the direction of applying a test load according to a proportion, and measuring the static stiffness and the dynamic stiffness of the sample by using a measuring instrument, thereby obtaining the ratio of the dynamic stiffness to the static stiffness of the sleeper pad. The dynamic and static stiffness ratio of the sleeper cushion is measured through the method, and the detection requirement is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dynamic and static stiffness detection, in particular to a simple test method for dynamic and static stiffness ratio of a sleeper pad. BACKGROUND

[0002] The rubber sleeper pad is used as an elastic body between a steel rail and a concrete sleeper or under the sleeper, and is widely used on a railway line due to its unique elasticity and good insulation. The main function of the rubber sleeper pad is to buffer the high-speed vibration and impact generated when a train passes through a track, and to protect a roadbed and a sleeper.

[0003] The dynamic and static stiffness ratio of the sleeper pad needs to be effectively detected during development and production, but the current full-size sleeper pad detection of dynamic and static stiffness has high detection requirements, and ordinary detection equipment cannot meet the requirements. Therefore, a simple and accurate test method for the dynamic and static stiffness ratio of the sleeper pad is needed. SUMMARY

[0004] (I) Technical problems solved In view of the inconvenience of the existing detection technology, the present application provides a simple test method for the dynamic and static stiffness ratio of a sleeper pad, which has the advantages of low detection requirement and accurate results, solves the problem of high requirement of the traditional test method for the dynamic and static stiffness ratio of the sleeper pad, and provides a rapid detection means.

[0005] (II) Technical solutions To achieve the above detection purpose, the present application provides the following technical solutions: a simple test method for the dynamic and static stiffness ratio of a sleeper pad, including the following steps: Prepare a sample, and the structure of the sample is not changed and the vertical size is proportionally reduced to the applied load; Use a measuring instrument to measure the static stiffness and dynamic stiffness of the sample; Record the measured static stiffness and dynamic stiffness data; According to the measured data, the dynamic and static stiffness ratio is calculated.

[0006] Preferably, the measuring instrument in step 2) includes a displacement sensor and a force value sensor for measuring the stiffness curve of the sample.

[0007] Preferably, the measuring instrument in step 2) is an electro-hydraulic servo device, which can accurately control the size and application method of the load.

[0008] Preferably, the measuring instrument in step 2) can accurately control the application frequency of the load.

[0009] (III) Beneficial effects Compared with the prior art, the present application provides a simple test method for the dynamic and static stiffness ratio of a sleeper pad, which has the following beneficial effects: The sleeper pad dynamic-static stiffness ratio testing method realizes rapid and simple measurement of the sleeper pad dynamic-static stiffness ratio through a sample with specific structural dimensions, and reduces detection requirements. DETAILED DESCRIPTION

[0010] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0011] Embodiment 1 A simple sleeper pad dynamic-static stiffness ratio testing method comprises the following steps: Prepare a sample, and the structure of the sample is unchanged, the length and width dimensions perpendicular to the applied load are reduced by 5 times, and the thickness direction is unchanged; Use a measuring instrument to measure the static stiffness and dynamic stiffness of the sample, and the load is reduced to 25 times the original force value; Record the measured static stiffness and dynamic stiffness data; According to the measured data, the dynamic-static stiffness ratio is calculated.

[0012] The measuring instrument in step 2) comprises a displacement sensor and a force value sensor, and is used to measure the stiffness curve of the sample.

[0013] The measuring instrument in step 2) is an electro-hydraulic servo device, which can accurately control the size and application method of the load.

[0014] The measuring instrument in step 2) can accurately control the application frequency of the load.

[0015] Embodiment 2 A simple sleeper pad dynamic-static stiffness ratio testing method comprises the following steps: Prepare a sample, and the structure of the sample is unchanged, the length and width dimensions perpendicular to the applied load are reduced by 4 times, and the thickness direction is unchanged; Use a measuring instrument to measure the static stiffness and dynamic stiffness of the sample, and the load is reduced to 16 times the original force value; Record the measured static stiffness and dynamic stiffness data; According to the measured data, the dynamic-static stiffness ratio is calculated.

[0016] The measuring instrument in step 2) comprises a displacement sensor and a force value sensor, and is used to measure the stiffness curve of the sample.

[0017] The measuring instrument in the step 2) is an electro-hydraulic servo device, which can accurately control the size and application mode of the load.

[0018] The measuring instrument in the step 2) can accurately control the application frequency of the load.

[0019] The beneficial effects of the present application are: The track pad dynamic-static stiffness ratio is quickly and simply measured by the sample with the specific structure size, and the detection requirement is reduced.

[0020] Typical cases: Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simple method for detecting the ratio of dynamic to static stiffness of railway sleeper pads, characterized in that, Includes the following steps: Prepare a sample with the same structure, but reduce the size proportionally to the dimension perpendicular to the applied load. The static and dynamic stiffness of the sample are measured using measuring instruments. Record the measured static and dynamic stiffness data; The dynamic-to-static stiffness ratio is calculated based on the measured data.

2. The simplified method for detecting the dynamic-to-static stiffness ratio of a railway sleeper pad according to claim 1, characterized in that, The measuring instruments in step 2) include a displacement sensor and a force sensor, used to measure the stiffness curve of the sample.

3. A simplified method for detecting the dynamic-to-static stiffness ratio of a railway sleeper pad according to claim 1, characterized in that, The measuring instrument in step 2) is an electro-hydraulic servo device, which can precisely control the size and application method of the load.

4. A simplified method for detecting the dynamic-to-static stiffness ratio of a railway sleeper pad according to claim 1, characterized in that, The measuring instrument in step 2) can precisely control the frequency of load application.