Resonant Sleeper Bending Fatigue Testing Machine and Its Application

Abstract

The invention discloses a resonance bending fatigue test machine for railway sleepers and application of the resonance bending fatigue test machine, and belongs to the technical field of test machines. The resonance bending fatigue test machine for the railway sleepers comprises a base, two side upright columns, a vibration exciter, a constant-force hydraulic loading system and a control system. The two side upright columns are symmetrically arranged on the upper end surface of the base, force measuring sensors, support blocks and small support plates A are sequentially arranged on the upper end surfaces of the two side upright columns, and a railway sleeper can be supported by the two side upright columns; the vibration exciter is arranged between the two side upright columns, the lower end of the vibration exciter is supported on the upper end surface of the base by a constant-force hydraulic loading mechanism, the upper end of the vibration exciter is fastened and connected with the tested railway sleeper by a fastening support mechanism, and load applied by the vibration exciter acts on a loading location for the tested railway sleeper; force can be loaded on the tested railway sleeper by the constant-force hydraulic loading system via the vibration exciter, and the constant-force hydraulic loading system and the vibration exciter can work under the control of the control system. The resonance bending fatigue test machine and the application have the advantages that test frequencies can be increased by the fatigue test machine on the basis of resonance principles, the test cycle can be shortened, and accordingly the test cost can be saved to a great extent.

Description

technical field [0001] The invention belongs to the technical field of testing machines, and in particular relates to a resonance type sleeper bending fatigue testing machine and its application. Background technique [0002] Railway sleepers are an important part of railways. See attached figure 1 At present, sleepers are basically reinforced concrete members. Since 1957, Chinese railways have also adopted a large number of prestressed concrete sleepers, and by the end of 1983, about 64.45 million sleepers had been laid. In 1983, the annual output was more than 4 million, accounting for about a quarter of the world's annual output of prestressed concrete sleepers of about 15 million. Concrete sleepers have been used in all the main railway lines in my country, and the application range is extremely wide. [0003] In order to test the mechanical properties of railway sleepers, the railway industry has formulated the test rules for sleepers - "Prestressed Concrete Sleeper...

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Problems solved by technology

[0004] The purpose of the present invention is to propose a resonant sleeper bending fatigue testing machine and its application to solve the problems of low efficiency, high cost and cumbersome test operation in the prior art

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