Wall Thickness & Buckling Bundle

Wall Thickness & Buckling Bundle

The Bending Buckling module (BUCK) determines the hydrostatic collapse pressure for a pipe having a defined eccentricity using Timoshenko’s elastic stability formula. The module also calculates the critical buckling curvature and moment taking full account of the elastic-plastic behaviour of the pipe material (the material model is defined using a bi-linear description of the elastic and plastic regions).

To operate this module, the user inputs the pipe dimensions and material properties and the water depth/density. BUCK then calculates the following:

• the critical collapse pressure;
• the critical buckling curvature and associate bending moment;
• the hydrostatic pressure acting on the pipeline

Wall Thickness Calculation (DNV OS-F101 2010)

• Pressure Containment (Bursting)
• Local Buckling (General); which comprise of:
• Local Buckling External Overpressure only (System Collapse)
• Propagation Buckling
• Local Buckling (Combined Loading Criteria). This may be Load or Displacement Controlled.