ABSTRACT:

When ice-resistant platforms for the development of the Russian Arctic deposits are designed, the accurate estimation of the ice loads is the most important for the operational reliability of the structure during all lifetime cycle. In whole, the ice cover of the freezing seas represents a composite spatially-non-uniform body consisting of various ice features, such as the level ice fields, drifting first-year or multi-year hummocks and solid hummocky fields, stamukhas and other ice features. The purpose of this study is mathematical modeling of the interaction and failure inside agglomeration of drifting ice features in front of offshore engineering structures. This paper continues the investigations of the authors concerning the given problem (Bekker et al, 2007), thus the new tasks have been solved:

  • modeling of ice floe contact interaction inside agglomeration on basis of energy approach subject to the results of experimental research in ice deformation and failure process at different parameters (temperature, salinity, density, strain rate etc.);

  • determination of significant parameters influencing the ratio of elastic deformation work to fracture work;

  • probabilistic modeling of energy distribution at ice floe contact interaction.

INTRODUCTION

When designing ice-resistant platforms for the development of the largest Russian Arctic deposits is realized, it is necessary to estimate the reliable design ice loads with the target level of safety during all the lifetime of the structure. Generally the ice cover of the freezing seas represents the composite spatially-non-uniform body consisting of various ice features, drifting in water areas with various sizes and concentration (Bekker et al, 2007). In the previous studies (Bekker et al, 2007) the authors offered the deterministic model of local ice drift in the water area including contact interactions of ice fragments (level ice floes, ice pieces, etc.) with each other and with the fixed objects.

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