Abstract
Clashing of risers and umbilicals with other risers, umbilicals, mooring lines, tendons, the hull, or other objects is a major design issue. Preventing clashing is the preferred course of action; however, clashing between catenary risers or catenary umbilicals and tension leg platform (TLP) tendons is typically more challenging to prevent due to the difference in configuration/stiffness and the light weight in the case of umbilicals. In this article, the effect of parameters such as the hang-off angle, hang-off location, azimuth heading, Drag coefficient and weight on the clashing between TLP tendons and umbilicals is considered. Alternatives to preventing such clashing are also discussed.
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