Broadband vibration excitation test device of magnetic levitation beam track structure

Abstract

The invention discloses a broadband vibration excitation test device of a magnetic levitation beam track structure. The test device comprises a test platform foundation for supporting the magnetic levitation beam track structure, and a plurality of hydraulic electromagnetic hybrid vibration excitation devices arranged in the length direction of a track beam; and each hydraulic electromagnetic hybrid vibration excitation device comprises a vertical hydraulic vibration exciter, a transverse electric vibration exciter and an electromagnetic vibration exciter. According to the test device, the hydraulic electromagnetic hybrid vibration excitation is adopted, so that the broadband vibration excitation of low-frequency and high-frequency load superposition is realized, and the multi-frequency moving effect of a train on the beam track structure can be more really simulated; and the plurality of vibration exciters are adopted for cooperative loading, so that the moving effects of the train passing through the beam track structure at different speeds can be simulated, the test requirements of beam track structures and turnout structures with different lengths and different line types can be met, high-speed, medium-speed and low-speed magnetic levitation beam track structures can be subjected to structure strength, fatigue performance and vibration characteristic testing, and an important test platform is provided for design and research of the beam track structures.

Description

technical field [0001] The invention relates to the technical field of maglev beam-rail structure tests, in particular to a wide-frequency excitation test device for maglev beam-rail structures. Background technique [0002] At present, both medium and low-speed and high-speed maglev beam-rail structures adopt a relatively conservative large-rigidity design to ensure the suspension stability of the system, but this leads to a large volume of the track beam and a sharp increase in project cost. Therefore, it is necessary to carry out experimental research on maglev beam-rail structure, improve the suspension stability of the system, optimize the beam-rail structure, and reduce the project cost. The maglev beam-rail structure is affected by the low-frequency load of the train and the high-frequency load of the suspension module at the same time. At present, the domestic and foreign structural test benches usually use a hydraulic vibration system, and the maximum loading freque...

AI Technical Summary

Problems solved by technology

The maglev beam-rail structure is affected by the low-frequency load of the train and the high-frequency load of the suspension module at the same time. At present, the domestic and foreign structural test benches usually use a hydraulic vibration system, and the maximum loading frequency can only reach a dozen Hz. It can simulate fixed loads, but it is difficult to meet the requirements of broadband moving loads for maglev beam-rail structures

Images