Dynamic Ice Force Analysis on a Conical Structure Based on Direct Observation and Measurement

Abstract

In order to study dynamic ice force induced by icestructure interaction, we adopted the most reliable method to directly measure ice force on fullscale structure. This paper mainly demonstrates the qualitative description on the basic model for dynamic ice forces based on direct measurement on the jackets with icebreaking cone in the Bohai Sea. Temporal variations of ice force are recorded by the ice load panels, and corresponding ice failure processes on conical structures are recorded by video camera. It is found that, when an ice sheet acts on the upward narrow cone, bending failure occurs and broken ice pieces are completely cleared up by the side of the cone. The basic form of dynamic ice force in time domain is a series of impulse signals with minimum load of zero.