Stress corrosion sensitivity prediction method for shell-and-tube heat exchanger tube and tube plate welded joint
A technology for shell-and-tube heat exchangers and tube-sheet welding, which is used in instruments, special data processing applications, electrical digital data processing, etc. Stress distribution and other issues to achieve the effect of ensuring correctness
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[0047] (1) Determine the geometric dimensions of the welded joints between the tube and tube sheet of the shell-and-tube heat exchanger.
[0048] (2) Determine the material parameters of the heat exchanger tube head that change with temperature, including: elastic modulus, Poisson's ratio, yield strength, thermal conductivity coefficient, thermal expansion coefficient, specific heat, and density.
[0049] (3) In order to improve the calculation efficiency, the two-dimensional axisymmetric finite element model of the welded joint between the tube and tube sheet of the shell-and-tube heat exchanger was established by using the ABAQUS finite element software, as shown in figure 1 shown. Set the boundary constraint conditions of the tube head of the shell-and-tube heat exchanger. The heat exchange tube is set at the end point I of the tube to be axisymmetrically constrained in the X direction, and the tube sheet is set at the end point II of the plate to be axisymmetrically const...
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