Change search
ReferencesLink to record
Permanent link

Direct link
Probabilistic Design of Midship Panel based on Model scale compressive Ice Test
Norwegian University of Science and Technology, Faculty of Engineering Science and Technology, Department of Marine Technology.
2013 (English)MasteroppgaveStudent thesis
Abstract [en]

This thesis is investigating compressive ice loads acting on the mid- ship using a model experiment performed in Aalto ice tank where a tactile sensor was mounted on the side. In order to get insight in the very complex behavior of ice; the sea ice growth, mechanical prop- erties and failure mechanisms are presented. Further some previous work on the topic is presented, with discussion, in addition to regula- tions on local ice loads and structure requirements. The execution of the experiment is described, and the method for processing the data and based on this data using probabilistic design to design a midship panel. For datasets where the interaction area is semi-continuous a new event denition is proposed, based on temporal events consisting of spatial events. The maximum event method developed by [Jordaan et al., 1993] is applied in sampling data from the new temporal events. Data is sampled for increasing area sizes corresponding to number of connected triggered censor cells. The data is adjusted for exposure in order to have a standardized curve corresponding to the area in ques- tion. An exponential distribution is tted to the tail of the data, and presented in a Weibull probability plot. The parameters of the distri- butions, x0 and are functions of area. Assuming the area is acting in a line corresponding to the span of a longitudinally framed panel, and given a return period and a scenario, a design load is predicted. Based on this load, scantlings of a panel is recommended which also complies with Finnish-Swedish ice class rules. The integrity of the structure is checked using Monte Carlo analysis. To get more insight into the data set, a local pressure area curve, and an average pressure over total measured contact area relationship is presented for the entire data set, as well as spatial and process pressure area curves and pressure history for the biggest load event and the biggest pressure event.

Place, publisher, year, edition, pages
Institutt for marin teknikk , 2013. , 116 p.
URN: urn:nbn:no:ntnu:diva-22958Local ID: ntnudaim:9012OAI: diva2:655560
Available from: 2013-10-11 Created: 2013-10-11 Last updated: 2013-10-11Bibliographically approved

Open Access in DiVA

fulltext(7498 kB)419 downloads
File information
File name FULLTEXT01.pdfFile size 7498 kBChecksum SHA-512
Type fulltextMimetype application/pdf
cover(184 kB)16 downloads
File information
File name COVER01.pdfFile size 184 kBChecksum SHA-512
Type coverMimetype application/pdf
attachment(28 kB)12 downloads
File information
File name ATTACHMENT01.zipFile size 28 kBChecksum SHA-512
Type attachmentMimetype application/zip

By organisation
Department of Marine Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 419 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 59 hits
ReferencesLink to record
Permanent link

Direct link