Steel sect ions
The boom consists of a total of 81 steel sections. The
steel sections are 7.50 m long and with infinite connection
stiffness connected to the links. Because the links
have a relatively low stiffness compared to the connection,
strains inside the connection are negligible compared
to strains in the links. The connection stiffness can
therefore be infinite in the model.
The steel sections have the following properties, based
on the properties Orcaflex provides for a homogeneous
steel pipe:
• Outer diameter: 1.55 m
• Inner diameter: 1.50 m
• Mass per unit length: 0.940 t/m
• Bending stiffness: 7.38*106 kNm²
• Axial stiffness: 25.4*106 kN
• Poisson ratio: 0.293
• Torsional stiffness: 5.71*106 kNm²
• Drag Coefficient: 1.2 (Axial: 0.008)
• Number of segments: 1