Interference analysis should be performed to ensure that the Catenary Riser will not interfere with other risers, mooring lines, or structures. The potential clashing of the risers that may be caused by vessel motions and riser vortex induced vibration should be analyzed if multiple risers are planned.
The analysis should include effects of Reynold number and uncertainty/inaccuracy in riser tension. The following contacts should be avoided:
- Riser to riser
- Riser to mooring
- Riser to structure
However, contact may be allowed if it can be demonstrated that the contact condition is rare and the associated forces do not cause any detrimental damage to the riser systems and/or the other components.