Method for adjusting axial size of U-shaped corrugated pipe

The invention discloses a method for adjusting the axial size of a U-shaped corrugated pipe, and solves the problems that extra materials in the corrugated pipe are easily damaged and the service life is influenced due to the fact that excessive stretching or compression is difficult to avoid in a traditional method. According to the method for adjusting the axial size of the U-shaped corrugated pipe, finite element simulation analysis is carried out according to the material structure size and the hydraulic forming process, and a stretching or compression deformation finite element model for adjusting the axial height of the corrugated pipe after hydraulic forming is built by utilizing corrected analysis model parameters; a conventional direct stretching or compression mode is adopted, and a deformation area during axial size adjustment is controlled by applying internal pressure support and external constraint; and according to a finite element simulation result, an axial size adjusting effect is evaluated,