MARITIME Ice Load Monitoring Industry Seminar: Operational conditions for ships on the NSR Busan Håvard Nyseth 30 May 2016 1 DNV GL 2014 30 May 2016 SAFER, SMARTER, GREENER
Content Background Purpose of Ice Load Monitoring (ILM) systems Typical monitoring system components Examples from previous ILM projects 2
Reference projects KV Svalbard KBV002 Triton Pajuttaat UMIAK I S.A. Agulhas II Kronprins Haakon 3
Background 4
Operation in ice covered vs open water Shipping in ice covered waters is increasing Crews with limited experience on ice operations IMO Polar Code strengthens the requirements for polar shipping One of the main challenges in ship operations in ice covered waters is to ensure that the ship is operated within its actual capability limits Operations in ice include additional risk compared to global shipping risk levels World wide Polar Waters R R Identify Additional risk 5
Purpose of Ice Load Monitoring systems 6
Ice load monitoring for safe operation in ice covered waters Document and monitor actual loading on hull and machinery System provides information for the crew on the actual level of the hull capacity utilization and current ice conditions To limit potential damages and over loadings Improve operational efficiency in ice Route planning and optimization Fuel monitoring Training aid for crew Information from different systems integrated into a Decision Support Tool for safe operations in ice covered waters Risk reduction Polar Code 7
ILM system components 8
Sensors. Global ship motions (MRU) Noise and vibration recording Strain sensors on hull girder Strain sensors on propulsion and steering structure: - Propeller and shaft - Thruster/pod structure - Rudder Ice thickness Strain sensors on local hull structure 08 June 2016 Slide 9
Gathering of data Navigational data: - Speed - Position - Heading Wave radar Ice radar Satellite images Ice charts 08 June 2016 Engine data: - Power - RPM - Fuel consumption Slide 10 Propulsion data: - Power - RPM - Pitch - Steering angles
.may be integrated into a Decision Support System for safe and efficient operation in ice 08 June 2016 Slide 11
Structural response assessment of local structure based on strain measurements Measuring system mounted on local structural members Based on spot checks of critical frames in ice belt region Complex hull geometry and random load patterns complicate the response and strength assessment structural response not explicitly determined Procedures developed to convert response signals into a measure of structural utilization of ship structure. Slide 12
Instrumentation Plan 08 June 2016 Slide 13
Raw strain signals A3n45RAW A3p45RAW B3n45RAW B3p45RAW 08 June 2016 Slide 14
Electro-magnetic ice thickness measurement device 08 June 2016 Slide 15
Visualization at bridge 08 June 2016 Slide 16
Ice Load Monitoring and full scale measurement projects 17
KV Svalbard Ice loads on hull structure Global motions Inboard noise and vibration Fuel efficiency Ice conditions and forecast Built in 2002 at Aker Langsten, Norway POLAR-10 Icebreaker Ice Load Monitoring 2007-2009 Coldtech 2010-2013 18
SA Agulhas II Ice loads on hull structure Ice loads on propulsion system Global motions Inboard noise and vibration Underwater noise Built in 2012 at STX Rauma, Finland PC-5 /ICE-10 Ice trial in Bay of Bothnia 2012 Antarctica 2012-2016 19
UMIAK I Torque in propeller shaft Thrust in propeller shaft Bending moment in propeller shaft Built in 2004 at Univarsal, Japan ICE-15 Measurements carried out during the whole season 2010-11 08 June 2016 Slide 20
SafeArc project Pajuttaat, Royal Arctic Line (Greenland) propulsion parameters underwater noise Swedish Coast Guard vessel KVB 002 Triton (Bay of Bothnia) Propulsion machinery torque rpm structural strength, ice conditions and consumption Hull structure Photo: Knut Espen Solberg Photo: Knut Espen Solberg 21
Kronprins Haakon A total of 24 frames to be instrumented: Bow Bow shoulder Midship Aft shoulder Aft Norwegian research vessel currently under construction at Fincantieri To be delivered in 2017 PC-3 Icebreaker 22
Håvard Nyseth Havard.Nyseth@dnvgl.com +47 951 72 256 www.dnvgl.com SAFER, SMARTER, GREENER 23