DESIGN LOAD PROPULSION SIMULATION (DLPS)

An enhanced propeller/ice interaction model was developed and implemented as a new Modular Ship Modelling (MSM) component. This Design Load Model (DLM) was derived from the Joint Research Project Agreement #6 (JRPA #6) work targeted at developing design standards for the propellers and propulsion system for the construction of Arctic Class and Type ships. The model is useful in that it relates dynamic propulsion system performance to time varying propeller ice-load conditions. The modelling environment is also well suited to varying key parameters and observing their effects on propulsion system performance. For propeller/ice interactions, propulsion drive train shafting inertia and ice load conditions such as thickness and duration of an ice milling event are parameters of key interest. The enhanced MSM propeller/ice interaction model was shown to correlate reasonably well with available full-scale measurements for the CCGS Louis St. Laurent and USCGC Polar Star. Shaft speed was found to be a very good parameter to characterize the behaviour and performance of the propulsion system as a whole and to provide a means of calibrating a propeller/ice interaction model. More specifically, the maximum drop in shaft speed and the time to reach that point during a propeller/ice interaction event are key characteristics to note. It is recommended that shaft speed be monitored as a useful condition indicator of propulsion system performance during propeller/ice interaction events for both Arctic Class and Type ships. Having this kind of information in a historical database can yield important information on the number of occurrences and severity of shaft speed deviations during propeller/ice interaction events. This would contribute to the progressive evolution of suitable design standards for Arctic Class and Type ships.

• Record URL:
  http://www.tc.gc.ca/tdc/summary/13100/13132e.htm
• Corporate Authors:

  Transport Canada

  Transportation Development Centre, 800 Rene-Levesque Boulevard West, Suite 600
  Montreal, Quebec  Canada  H3B 2X1

  GasTOPS Limited

  Ottawa, Ontario,   Canada 
• Authors:
  • Turner, J K
  • Dupuis, R J
• Publication Date: 1998

Language

• English

Media Info

• Features: References;
• Pagination: v.p.

Subject/Index Terms

• TRT Terms: Design load; Design standards; Ice; Milling; Performance; Propellers; Propulsion; Shafts (Machinery); Ships; Simulation; Speed; Thickness; Time duration
• Geographic Terms: Arctic Regions
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00936868
• Record Type: Publication
• Report/Paper Numbers: TP 13132E
• Files: TRIS
• Created Date: Jan 23 2003 12:00AM