Abstract
In winter navigation, a viable ice load scenario for azimuthing propulsor is an ice block impact to the propulsor structure. Such scenario is featured in the new Finnish-Swedish Ice Class Rules. This case can be considered as a dynamic process, where the ice contact and the structural deflection are contributing factors towards the net load on the propulsor structure.
The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.
With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.
In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.
The ice contact between the propulsor and ice together with the propulsor structure dynamics were implemented in a dynamic impact model. The model was validated with small-scale testing and full-scale reference cases.
With the dynamic model, the effect of operational and dimensional parameters to the ice impact load were studied. However, the use in ice class rules requires simplified formulation. This formulation should take easily understandable physical parameters as input, and provide a rule-of-thumb- results for ice impact load.
In this paper, the development of the simplified approach is presented, the simplified model is tested and its key parameters are identified.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions |
| Publisher | Luleå University of Technology |
| Number of pages | 10 |
| Volume | 2019-June |
| Publication status | Published - 2019 |
| MoE publication type | A4 Article in a conference publication |
| Event | 25th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2019 - Delft, Netherlands Duration: 9 Jun 2019 → 13 Jun 2019 Conference number: 25 |
Publication series
| Series | POAC Proceedings |
|---|---|
| Volume | 2019-June |
| ISSN | 0376-6756 |
Conference
| Conference | 25th International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2019 |
|---|---|
| Abbreviated title | POAC |
| Country/Territory | Netherlands |
| City | Delft |
| Period | 9/06/19 → 13/06/19 |
Keywords
- Ice
- Impact
- Load
- Azimuthing thruster