Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 217 - 226 |
| Number of pages | 10 |
| Journal | Computers and Structures |
| Volume | 86 |
| Issue number | 3-5 |
| DOIs | |
| Publication status | Published - 2008 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Impact load mitigation
- Semi-active control
- Conical structures
- Ice loading
- Off-shore wind turbine
- Structural dynamics
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Mitigation of ice loading on off-shore wind turbines : Feasibility study of a semi-active solution. / Mróz, Arkadiusz; Holnicki-Szulc, Jan (Corresponding Author); Kärnä, Tuomo.
In: Computers and Structures, Vol. 86, No. 3-5, 2008, p. 217 - 226.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Mitigation of ice loading on off-shore wind turbines
T2 - Feasibility study of a semi-active solution
AU - Mróz, Arkadiusz
AU - Holnicki-Szulc, Jan
AU - Kärnä, Tuomo
PY - 2008
Y1 - 2008
N2 - This paper focuses on mitigation of dynamic loading induced on off-shore towers by drifting ice. Conical structures attached to off-shore towers at water level are widely used to reduce static and dynamic ice actions. The level of remaining forces is enough to cause severe tower vibrations, therefore a need for an additional device to reduce the remaining actions is recognized. Present study introduces a new, compliant connection between the cone and the tower. Parameters of the connection are controlled semi-actively to optimize the effect. Numerical studies are made to roughly estimate the effectiveness of the new solution. First, contact problem of ice sheet and cone is simulated using simplified material model for ice. Then a numerical model of a wind turbine tower is constructed. Dynamic interaction between cone and tower is simulated and the new solution effectiveness is discussed.
AB - This paper focuses on mitigation of dynamic loading induced on off-shore towers by drifting ice. Conical structures attached to off-shore towers at water level are widely used to reduce static and dynamic ice actions. The level of remaining forces is enough to cause severe tower vibrations, therefore a need for an additional device to reduce the remaining actions is recognized. Present study introduces a new, compliant connection between the cone and the tower. Parameters of the connection are controlled semi-actively to optimize the effect. Numerical studies are made to roughly estimate the effectiveness of the new solution. First, contact problem of ice sheet and cone is simulated using simplified material model for ice. Then a numerical model of a wind turbine tower is constructed. Dynamic interaction between cone and tower is simulated and the new solution effectiveness is discussed.
KW - Impact load mitigation
KW - Semi-active control
KW - Conical structures
KW - Ice loading
KW - Off-shore wind turbine
KW - Structural dynamics
U2 - 10.1016/j.compstruc.2007.01.039
DO - 10.1016/j.compstruc.2007.01.039
M3 - Article
VL - 86
SP - 217
EP - 226
JO - Computers and Structures
JF - Computers and Structures
SN - 0045-7949
IS - 3-5
ER -