Device and method for testing dynamic characteristics of magnetic suspension low-positioned structure

The invention discloses a device and a method for testing the dynamic characteristics of a magnetic suspension low-positioned structure. The device comprises a model test box and a low-positioned structure model arranged in the model test box, the loading system is arranged above the model test box and is used for applying a mechanical load to a span in the low structure model; the monitoring device is used for measuring the internal parameter change of the low structure model in the loading process; and the circulating rainfall system is used for simulating circulating rainfall. According to the invention, the circulating rainfall system is arranged, so that the dynamic characteristic test of the magnetic suspension low-mounted structure under the natural working condition and the rainfall working condition can be realized, and rainwater can be recycled; meanwhile, the rainwater recycling volume is measured, and data support is provided for the permeability characteristics of the low-structure roadbed under