![]() Please contact JD Marine to obtain a version of VIVA compatible with this version of OrcaFlex. The OrcaFlex interface to VIVA has been developed and tested with version 8.4 of VIVA. The drag coefficients can be used by OrcaFlex to carry out a coupled steady-state VIV analysis. Results include amplitudes of vibration, mean effective drag coefficients and fatigue life. A combined multi-mode response is also reported. Results are reported in spreadsheet form for each single excited mode of vibration. This allows a riser model to be built in OrcaFlex, taking advantage of the usual user interface, and analysed by VIVA (which carries out a frequency domain calculation of VIV response based on an energy balance). As part of the project, an interface has been written between OrcaFlex and VIVA. Orcina was a participating member of a joint industry project, started in 2000 and run by DTCEL and Prof. ![]() M Triantafyllou at MIT and distributed by JD Marine (formerly DTCEL). ![]() VIVA is a frequency domain VIV prediction program developed by Prof. ![]()
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