Flexibility analysis of the vessel-piping interface

摘要

The connections of a pressure vessel with the interconnecting piping system are the boundaries for the computer model built for the analysis of the vessel. The stiffness and the imposed displacements at these points significantly influence the stresses in the piping as well as forces and moments imposed on the connection to the adjacent pressure equipment. This paper summarizes the results of numerous FEM analyses to establish stiffness coefficients for nozzles in spherical and cylindrical pressure vessels.