Flexible Riser Dynamics Modelled in 3-Dimensions

P.A.Brown, R.Chandwani, I.Larsen

Proceedings of International Conference on Offshore Structures, City University, London, Sept. 1987

An extensive series of 3-D numerical simulations is required in order to design a dynamic flexible riser system. This paper presents an efficient method of solving the corresponding non-linear equation system using a lumped mass finite difference scheme and gives details of the software package developed, namely FLEX-RISER. The verification of this numerical model is discussed and a set of example analyses are presented showing some applications of the package. These examples describe the key modelling points for this type of analysis and show the type of results necessary for the design of such systems. It is concluded that an efficient analytical tool is essential for the comprehensive dynamic design of a flexible riser system.