Dynamic loading device of wave testing machine used for transmission tower tension change research

The utility model discloses a dynamic loading device of a wave testing machine used for transmission tower tension change researches. The dynamic loading device comprises a rack, a driving mechanism and a four-parallel-rod mechanism, wherein the driving mechanism and the four-parallel-rod mechanism are arranged on a frame, the driving mechanism and the four-parallel-rod mechanism are in driving connection, and the driving mechanism comprises a frequency-variable motor; the four-parallel-rod mechanism is vertically arranged, and the four-parallel-rod mechanism comprises a driving rocker arm, a driven rocker arm and a connecting rod connected between the driving rocker arm and the driven rocker arm; and a hollow casing pipe is vertically arranged at the middle part of the connecting rod, and the frequency-variable motor and a frequency converter are in control connection. The dynamic loading device disclosed by the utility model can simulate waves of conductors with various kinds of dynamic characteristics and different amplitudes by adjusting operation frequency and circular operation radiuses, so as to reappear the dynamic tension acting on a power transmission tower during the waving of an ice coating conductor, so that the dynamic loading device can carry out deep researches to a collapse mechanism of the power transmission tower under the action of active tension of conductor waving.