Hydraulic pulse excitation device for experimental investigation on dynamic characteristics of structure

The invention discloses a hydraulic pulse excitation device for experimental investigation on dynamic characteristics of a structure. The hydraulic pulse excitation device comprises a bottom plate, a pulse excitation component and a switch component, wherein the pulse excitation component comprises an impacting shaft, a sleeve, an excitation spring, an excitation hydraulic cylinder and a connector; the switch component comprises a switch hydraulic cylinder, a switch driving lever and a switch resetting mechanism; the excitation spring drives the impacting shaft to generate an impact force, and the switch resetting mechanism is used for locking and releasing the impacting shaft. In the hydraulic pulse excitation device, the hydraulic cylinder is used as an excitation driving mechanism, the hydraulic cylinder has a sealing function, so that the hydraulic pulse excitation device can respectively execute pulse excitation on the structure in air and under water, thereby realizing experiment and measurement of the