Analysis Of Interaction Probabilities Between Large Ice Features And Offshore Structures In The Canadian Beaufort Sea Microform PDF Download

"This report is a companion report to two further CMEL reports dealing with an ice/structure interaction computer model and probabilistic ice loads on offshore structures in the Beaufort Sea, (CMEL Report#'s 1008 and 1016). The intent of these reports is to collectively provide a preliminary probabilistic assessment of the global ice loads which may be applied to offshore production structures located on the Beaufort Sea Continental Shelf. These reports were initiated to demonstrate the feasibility of constructing structures to resist the ice loads in this area; they do not contain sufficient information for detailed design. For this report C.M.E.L. was requested to assemble the available information on ice statistics into one comprehensive document for the EIS submission. The information gathered for this report was obtained from a variety of sources. The ice statistic's contained in this report are representative of the Canadian Beaufort Sea and have been used in the computer production structures. The information presented in this report should not be used indicriminately for detailed design. ... This report concentrates on the larger ice features such as multi-year floes which may interact with fixed offshore structures in the region. A summary of the report is presented in Chapter 2. In Chapter 3, information on multi-year ice floe and hummock field size distributions is given along with multi-year ice concentrations in the southern Beaufort Sea during both summer and winter. The size distributions are transformed into possible impacting size distributions. Statistics on multi-year ice floe thickness and ridge keels are also presented. In Chapter 4, the possibility of future ice island calvings is discussed along with the probability of thick multi-year landfast ice calvings which are present in the fiords and bays of Northern Ellesmere Island. Possible size and thickness distributions for future ice islands are also presented. Measured and impacting ice floe speed distributions are given for both summer and winter in Chapter 5. In Chapter 6 interaction probabilities for multi-year floes, and ice islands impacting offshore structures are presented. Impacting kinetic energies, environmental forces and multi-year ice crushing pressure are presented in Chaters 7, 8 and 9 respectively"--ASTIS database.