The Significance of Low Velocity Near Bottom Currents on the In-Line Vortex-Induced Vibration Response of Rigid Subsea Jumpers Event: Subsea Houston Date: September 2004 Author: M. Hariharan, M. Cerkovnik - 2H Offshore Inc. H. Thompson - ChevronTexaco Subsea jumpers are susceptible to in-line and cross-flow vortex-induced vibration (VIV) fatigue damage due to bottom currents. From a design viewpoint, longer and less flexible jumpers are desirable in order to mitigate the effects of stresses due to high temperature and high pressure. The downside of this design is that these jumpers have low natural frequencies. A low velocity bottom current can, therefore, result in VIV excitation in the jumper. Cross-flow VIV amplitudes are typically much higher than in-line VIV amplitudes, but it is noted that the frequency of cross-flow VIV excitation is higher than the in-line VIV excitation frequency. In addition, the probability of occurrence of low velocity currents that result in low frequency vibration, is high. Therefore, the in-line VIV fatigue response of the jumper cannot be neglected, and may result in a requirement for vortex-suppression devices such as strakes. The objective of this paper is to highlight the susceptibility of the subsea jumpers to inline VIV due to low velocity near bottom currents. An illustrative example of a rigid jumper located in 1,300ft water depth, West Africa is presented. If you would like a copy of this technical paper register to download it (pop-up form). All technical papers Share this page Share on FacebookShare on LinkedinShare on TwitterEmail Services Production & Export Riser Concept Engineering Steel Catenary Risers Top Tensioned Risers Hybrid Risers Flexible Risers Composite Risers Subsea Jumper Spools Subsea Umbilicals Deep Sea Mining Drilling, Completion & Workover Drilling Risers Completion & Workover Risers Subsea Wellheads & Conductors Platform Conductors Well Engineering Minimum Facilities Platforms Conductor Supported Wellhead Platforms & CoSMOS Riser Delivery Management Riser Monitoring & Integrity Riser Monitoring System Engineering Drilling Riser Management Anomaly & Incident Engineering Subsea Wellhead System & Life Extension Platform Well Integrity & Life Extension Inspection, Maintenance & Repair Subsea Engineering Services Component Detailed Design Decommissioning Engineering Engineering Critical Assessment Installation Engineering Mechanical Connectors Offshore Renewable Energy Qualification Testing Verification & CVA Well Plug & Abandonment Get the latest riser insights!Receive our riser news, published papers and blog posts in your inbox monthly.