Stress Analysis And Design For Semicircular Cross Section Vessel With An Annular Sector Plate Sheet

With the rapid development of science and technology, pressure vessels have been widely used in many areas such as the nuclear, petroleum, chemical, metallurgy, light industry and so on, and have become the key equipments in these fields. In order to adapt to the variable working conditions, new design theories and methods are founded frequently. The annular sector semicircular cross section vessel was a kind of new pressure vessel that has emerged in recent years. In this paper, research on design theories and methods about annular sector semicircular cross section vessel was conducted. The stress analysis of the Annular Sector Semicircular Cross Section Vessel (ASSCSV) has an important significance for improving standards, ensuring the efficiency and reliability of vessel design and promoting technology level for manufacturing pressure vessel.In this paper the research status about the ASSCSV at home and abroad has been summarized. And the usages of Finite Element Method (FEM) in pressure vessel’design and analysis, including the method "Design by Rule" and the method "Stress Analysis Design". According to the FEM in other pressure vessels, the numerical simulation of the ASSCSV was conducted. The results show that the maximum equivalent stress appears in the central part of the annular sector plate, but the maximum equivalent stress of semi-cylindrical and semicircular plate appear at the connections of the inner surface. When the same wall thickness and internal pressure were used in FEM analysis, the equivalent stress of semi-cylindrical distributes uniformly most, and the overall equivalent stress of semicircular plate and semi-cylindrical are less than annular sector plate. For the annular sector plate, stresses were obtained FEM analysis under different geometry sizes and constraint conditions and the results were compared with each other. The critical thickness conditions, at which the constraint condition transmits form simply supported to the transition support as well as the constraint condition transmits form transition support to the fixed support, was obtained. By comparing the formulas for calculating the thickness of the single-cylinder and plate heat in standard, corresponding shape factors used in the ASSCSV design were gained.Researches in this paper supplies base materials for the design and analysis of ASSCSV, and will be of certain significance for the design theory and method for pressure vessels.