By analyzing the finite element parameters of floating-roof tapered tanks under harmonic settlement,the effects of the major geometric parameters of tapered tank(including wall variable parameters,wind girder stiffness,radius-to-thickness ratio and height-to-radius ratio) on tank structure deformation and stress are d.

Finite element simulation and experimental analysis of wall thickness deformation in the process of pipe bending;

The study on the experiment of wall thickness deformation of coreless bended small-diameter tube;

It has been put forward by experiment that the variation of wall thickness of tube is in directly propor-tion to outer-diameter ,inter-diameter,and (Rs-variation of tube area) during tube dieless upsetting.

In this paper, velocity field and variation of wall thickness are studiedtheoretically during tube dieless upsetting.