COMPARISON OF CHARACTERISTIC FAILURE FREQUENCY MODELS FOR ICE INDUCED VIBRATIONS

Abstract Several modelling approaches have been proposed for the modelling of ice-induced vibrations. Part of the differences in these approaches stem from the difference in the failure mode of the ice, whether in compression or bending. Within the spectre of crushing-failure models, different analytical models have been proposed. To investigate the differences, similarities and ease of implementation of models based on the crushing failure, two specific crushing failure frequency models are chosen for solution, simulation and comparison. These models are solved and then simulated with the same set of parameters. Corrections to one of the model are proposed and it is shown that although based on a similar modelling approach, the models do not predict the same behaviour. 1. Introduction Ice-induced vibrations (IIVs) have been investigated through analytical and numerical modelling. Historically, modelling approaches to IIVs were broadly characterized into two types, a characteristic failure frequency approach or a negative damping type approach. These theoretical models were proposed by