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PASS/NOZZLE-FEM 3.5. Program Manual | ![]() |
Table 3.9 shows key features of the base element (shell).
Table 3.9 | |
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Feature | Description |
Reference points: | A: shell start; B: shell end; |
Local shell coordinate system (LCS): | Axis X: shell transverse axis; Axis Y: shell transverse axis; angle θ of nozzle insertion is taken from this axis toward axis X; Axis Z: shell longitudinal axis. |
Orientation in WCS: | All axis can be horizontal and vertical according to the shell options: ![]() |
Shell constraints (dof): | For strength analysis (fig. 3.34): Point A. When calculating allowable loads, stiffnesses and stress intensification factors for a nozzle (fig. 3.35): Points A, B. ![]() |
Shell loads: | Inner overpressure. Outer pressure. Hydrostatic pressure. Thermal strains. Concentrated loads to free end (B) for strength analysis (fig. 3.36): ![]() |
Special calculations: | Allowable loads for end B (fig. 3.37). Stiffness and flexibility factors for end B (fig. 3.37). Stress intensification factors (fig. 3.37). ![]() |
Additional segments: | Specifies the offset of point B relative to point A (in the plane of the local X and Y axes). Defining taper by the wall slope angle or the second diameter. The base element also allows to specify: cylindrical legs at the start and at the end, reinforcing parameters of ends. ![]() |
PASS/NOZZLE-FEM 3.5. Program Manual
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