DYNAMIC POSITIONING CONFERENCE October 13-14, 2015 DESIGN 2. DYNCAP Full Scale Validation of a Vessel's Station-Keeping Capability Analysis

Transcription

1 DYNAMIC POSITIONING CONFERENCE Octber 13-14, 2015 DESIGN 2 DYNCAP Full Scale Validatin f a Vessel's Statin-Keeping Capability Analysis Øyvind Smgeli Nguyen Dng Trng, Kristffer Eide, Luca Pivan Marine Cybernetics

2 DESIGN SESSION 2 DYNCAP FULL SCALE VALIDATION OF A VESSEL S STATION-KEEPING CAPABILITY ANALYSIS Øyvind Smgeli Nguyen Dng Trng, Kristffer Eide, Luca Pivan MTS DYNAMIC POSITIONING CONFERENCE Hustn, Octber 13-14, 2015

3 WHAT IS DYNCAP? Ps-refs and sensrs Vessel mtin Prpeller dynamics DP cntrl system dynamics Dynamic envirnmental lads Thrust lsses Pwer system dynamics

4 BRIEF HISTORY The beginning: FlexShuttle JIP Presented at IMCA Annual Seminar 2010 MTS DP cnference 2013: DynCap cncept MTS DP cnference 2014: Diving vessel case study DP Brasil 2015: Offshre windmill service vessel case study MTS DP cnference 2015: Full-scale validatin Varius cmmercial prjects and ther cnferences DNV GL: New DP-CAP standard in 2016

5 EXPERIENCES Vessel mtin Acceptance criteria Slwlyvarying wave drift frces Sea state discretizatin Vessel mdel fidelity DP tuning Search algrithms Statistical significance Next step: full-scale validatin

6 THE SIMVAL PROJECT Sea Trials and Mdel Tests fr Validatin f Shiphandling Simulatin Mdels SimVal Gal: Imprve present validatin methdlgy fr ship-handling simulatin mdels Partners:

7 THE VESSEL: MV ISLAND CONDOR Owner: Island Offshre Thr1 Thr2 Thr3 Design: UT 776 CD Type: Platfrm service vessel Thr4 Thr5 Length: 97m Width: 20m Diesel electric main prpulsin Tw CP 2200 kw Tw CP bw 883 kw Bw CP 883 kw

8 TRIALS AND MEASUREMENTS All trials cnducted ff Nrwegian west cast 13 th t 17 th f Nvember 2014 Step respnses Maneuvering Statin-keeping Onbard measurements taken by MARINTEK Psitin, velcity, heading Heave, rll and pitch Pwer distributin and generatin DP thruster cmmand and feedback Wind speed and directin Sea state measured by a wave buy Current speed and directin nly estimated

9 ENVIRONMENTAL CONDITIONS Head wind Bw quartering wind Beam wind Stern quartering wind Fllwing wind

10 HEAVE, ROLL AND PITCH RESULTS Case Descriptin Head sea Bw quartering sea Beam sea Stern quartering sea Fllwing sea Exp Sim Exp Sim Exp Sim Exp Sim Exp Sim Max heave (m) Std heave (m) Max rll (deg) Std rll (deg) Max pitch (deg) Std pitch (deg)

11 HEAVE, ROLL AND PITCH TIME SERIES

12 STATION-KEEPING RESULTS SURGE, SWAY AND YAW Case Descriptin Head wind Bw quartering wind Beam wind Stern quartering wind Fllwing wind Exp Sim Exp Sim Exp Sim Exp Sim Exp Sim Max psitin deviatin (m) Std psitin deviatin (m) Max heading devatin (deg) Std heading devatin (deg) Average pwer all thrusters (kw)

13 FOOTPRINT COMPARISON

14 DYNCAP POWER ENVELOPE

15 DYNCAP WIND ENVELOPE Clse t capability limit

16 SUMMARY Summarized a brief histry and ratinale f the DynCap cncept Shared experiences in cnfiguring, running and analysing results Key cntributin: full-scale validatin with MV Island Cndr Step respnses DP statin-keeping Results shw satisfactry crrelatin between experiments and simulatins Obtaining sufficient data frm full-scala trials is challenging Cmplete pwer envelpe and wind envelpe demnstrated added value Demnstrated that DynCap is a valuable tl fr in-depth DP capability studies

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