Dynamic ice contact load model for azimuthing thrusters
| Autor: | Aki Kinnunen, Pekka Koskinen, Maria Tikanmäki, Jaakko Heinonen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
ta212
ta214 Ice–structure interaction Mechanical Engineering 020101 civil engineering Ocean Engineering 02 engineering and technology Propulsion 01 natural sciences 010305 fluids & plasmas 0201 civil engineering ice load model ice impact load scenario 0103 physical sciences Environmental science Load model azimuthing thruster Marine engineering |
| Zdroj: | Kinnunen, A, Tikanmäki, M, Heinonen, J & Koskinen, P 2019, ' Dynamic ice contact load model for azimuthing thrusters ', Ships and Offshore Structures, vol. 14, no. 8, pp. 890-898 . https://doi.org/10.1080/17445302.2019.1578098 |
| ISSN: | 1754-212X 1744-5302 |
| Popis: | For ships operating in winter conditions, ice loads are important load scenarios for designing azimuthing main propulsion units. One such contact scenario is ice impacting into an azimuthing thruster. In this paper, the formulation of this type of load scenario is presented and existing calculation methods are investigated. A calculation method for dynamic contact load is proposed for ice impact against the main propulsion unit. The basic principle of the proposed load calculation method is an impact of moving bodies combined with dynamic reaction of the structure. The contact load determination is based on the contact pressure–area relationship between an ice block and a steel structure. The dynamic contact problem is solved with a forward difference method. The method is validated with a controlled laboratory-scale test and the test principle is introduced. The dynamic load model is applied to study the effect of dynamics on the response load level. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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