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Title: | ICE-INDUCED VIBRATIONS OF OFFSHORE STRUCTURES | Authors: | YU BOWEI | Keywords: | Ice-induced vibrations, offshore structures, phenomenological model, stress-strain relationship, correlation, quantitative criteria | Issue Date: | 16-Aug-2019 | Citation: | YU BOWEI (2019-08-16). ICE-INDUCED VIBRATIONS OF OFFSHORE STRUCTURES. ScholarBank@NUS Repository. | Abstract: | Level ice acting on vertically sided structures may cause damage due to the considerable ice load and structural ice-induced vibrations. However, the existing models are usually validated for very limited cases and give largely discrepant predictions with measurements. In this study, a new physical mechanism is proposed that can explain the interaction between level ice and vertically sided structures, based on which, a new phenomenological model is developed that can give more accurate predictions and applicable to rigid and compliant structures with different scales, at a wide range of ice indentation velocities. The capability of the model is achieved by three components considered. The strain-rate dependent stress-strain relationship, the randomness in ice failure length and the spatial correlation of failure lengths. A set of quantitative criteria for identifying different ice-induced vibration modes are developed, which helps better assess the capability of the developed model for capturing different vibration modes. | URI: | https://scholarbank.nus.edu.sg/handle/10635/162831 |
Appears in Collections: | Ph.D Theses (Open) |
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