Validating MOTAN : Results from model-scale impact tests with the CCGS Terry Fox

• Main Authors: Johnston, M., Gagnon, R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2005
• Subjects: Arctic
• Online Access: https://nrc-publications.canada.ca/eng/view/ft/?id=eec8e813-465f-477b-b572-ad9040a5409d; https://nrc-publications.canada.ca/eng/view/object/?id=eec8e813-465f-477b-b572-ad9040a5409d; https://nrc-publications.canada.ca/fra/voir/objet/?id=eec8e813-465f-477b-b572-ad9040a5409d

This paper describes a model-scale test program that was designed to simulate the type of impacts that occurred during the Bergy Bit Trials. The model tests were conducted as part of a validation study of the inertial measurement system called MOTAN. Various types of controlled impact tests were conducted, during which global impact forces on a model of the TERRY FOX were compared to those measured independently on the impact plate. Percent differences between the two measurement systems ranged from 6.3 to 12.1% for the sway and pitch forces, depending upon whether the impact was symmetrical or oblique. The surge force from MOTAN was about 20% less than the longitudinal force measured on the impact plate. Results showed that MOTAN is a viable means of measuring ice-induced global impact forces and, therefore, is feasible for measuring loads on ships, at full-scale, during icebreaking operations. Peer reviewed: Yes NRC publication: Yes