Time-Domain Research on Integrated Coupling Model of MODU, Drilling Riser and Wellhead

摘要

The coupling effects between MODU and slim drilling riser are of primary importance in analysis ofrndynamic response of drilling riser system. However,, the effect of MODU on drilling riser is simplifiedrnin conventional model in a way of only considering RAO of MODU in frequency-domain, ignoring thernresponse of MODU on current and wave in time-domain.rnIn practical, the fitness-for-purpose assessment of drilling riser and wellhead is over-conservative byrnusing conventional model, which will induce redundant design of wellhead strength, MODU capacityrnrequirement, and drilling riser emergency evacuation response plan, consequently increase design andrnoperating cost. As a result there is a requirement for more refined methodologies and finite element modelsrnto evaluate the coupling effect between MODU and drilling riser in time-domain.