Parameter Relationships of Ice-Structure Interaction Process

A quarter of the world's undiscovered petroleum resources can be located in the Arctic and Far Eastern seas. The plans of exploration of these areas make real the problems of ice forces analysis for more severe conditions than were met earlier. The experience of operation of four platforms in north-eastern Sakhalin offshore gave a base to improve several analysis procedures of ice-structure analysis. Ice mechanics and numerical simulation of ice-structure interaction are major research interests today. The main aim of designing practice for ice-resistant platforms is estimation of maximum ice force on structure. ISO 19906 recommends to calculate it by multiplication of contact work area and the ice pressure on the contact σ_c at which it failed. A formula for calculation accounts for fracture mechanism and three dimensional stress-strain state on interface by combination of several geometric ratios but the dynamic nature of this process is ignored in ISO 19906.