VIVANA

VIVANA calculates the frequency domain response of a slender beam structure in a current, excited by vortex shedding. VIVANA is linked to the analysis program system RIFLEX and may be used for analysis of various marine structures such as tensioned and flexible risers, anchor lines, umbilicals, tendons, pipelines during installation and free spanning pipelines.

The analysis may include response due to:

  • cross-flow loading

  • in-line loading

  • combined cross-flow and in-line loading

The following limitations apply to the slender element model:

  • All cross-sections must have mass and radius of gyration

  • Only 2D current profiles may be used

  • The current profile to be used must be directed perpendicular or parallel to the plane of the structure.

  • The current profile to be used is selected in the static analysis. The current loads should normally be applied in the static analysis.