TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractA model for predicting dynamic umbilical stresses due to friction, elastic bending and tension has been developed and compared with strain gauge data from full scale dynamic testing. The results have been used to develop effective stress and fatigue analysis procedures that can be applied for both extreme and fatigue design. These procedures have been applied for both extreme and fatigue design cases to demonstrate the importance of different physical effects. Different applications in terms of tension and geometry may require different procedures for fatigue analysis. Alternative procedures are therefore proposed considering effects from umbilical geometry and water depth. As the oil industry continues to move into deeper waters the challenges related to umbilical design increases. Hence, methods and procedures need to be continuously developed to meet these challenges.