SIMULATION TEST DEVICE AND SIMULATION TEST METHOD FOR NATURAL FREQUENCY OF VIBRATION REDUCTION BALLAST BED

A simulation test device (40) and test method for the natural frequency of a vibration reduction ballast bed (10), which are used for performing a simulation test on a ballast bed (10) containing a vibration reduction unit. Said system comprises a substrate (200) and a test mechanism (41). The test mechanism (41) comprises a mass block (411), a force hammer (413), a response sensor (414) and a data acquisition unit (415). The vibration reduction unit is provided between the mass block (411) and the substrate (200), and thus the structure and working conditions of the vibration reduction ballast bed (10) using the vibration reduction unit can be simulated and vibration generated when a train passes through the vibration reduction ballast bed (10) is simulated by means of hammering by the force hammer (413), then a corresponding vibration signal is acquired by means of the response sensor (414) and the data acquisition unit (415), and the natural frequency of the corresponding vibration reduction ballast bed (1