Metal corrugated pipe expansion joint high-cycle fatigue test device and test method

The invention provides a high-cycle fatigue test device and test method for a metal bellows expansion joint. The fatigue test device comprises a vertical supporting assembly, a horizontal mounting plate, a servo electric cylinder, a threaded connector, a connecting plate, a tool pulling plate, a pressing plate assembly, a fixing plate, a pressure detection element, a test device base, an operation panel, a communication cable and a PLC. Compared with a traditional four-column hydraulic machine fatigue test device, the metal corrugated pipe expansion joint high-cycle fatigue test device is low in construction cost, easy to maintain, flexible to install and easy and convenient to operate, large capital construction and a large number of personnel are not needed for test tracking, and the labor cost is reduced. The high-cycle fatigue test device for the metal corrugated pipe expansion joint can be suitable for corrugated pipe expansion joints of different specifications by adjusting the position of the horizonta