A New Ice Load-Response Model for Structural Design of Ice Classed Ships

Intensive researches have been focused on the structural response under ice loads but repeated loads are not included. The ice impact problem is a dynamic process under repeated loads in reality. In this paper, a new ice load-response model for repeated impacts of ice loads is presented to study the structural response of ice ship plates. The analytical solutions obtained are validated by comparing against the experimental data and numerical analysis. The approach demonstrates the capability of simplified analytical methods for the repeated impact problems and their potential use for ice Rules. An illustrative example is given to determine plate thickness using generated design curves. Simple formulae of design plate thickness under two different design requirements are proposed to provide useful information for structural design of ice-classed ships subjected to repeated impact from drifting ice.