## Irregular Wave Forces on Monopile Foundations. Effect af Full Nonlinearity and Bed Slope

Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

### Standard

**Irregular Wave Forces on Monopile Foundations. Effect af Full Nonlinearity and Bed Slope.** / Schløer, Signe; Bredmose, Henrik; Bingham, Harry B.

Publication: Research - peer-review › Article in proceedings – Annual report year: 2011

### Harvard

*Proceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering.*vol. 5, American Society of Mechanical Engineers, pp. 581-588.

### APA

*Proceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering.*(Vol. 5, pp. 581-588). American Society of Mechanical Engineers.

### CBE

### MLA

*Proceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering.*American Society of Mechanical Engineers. 2011. 581-588.

### Vancouver

### Author

### Bibtex

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### RIS

TY - GEN

T1 - Irregular Wave Forces on Monopile Foundations. Effect af Full Nonlinearity and Bed Slope

AU - Schløer,Signe

AU - Bredmose,Henrik

AU - Bingham,Harry B.

PY - 2011

Y1 - 2011

N2 - Forces on a monopile from a nonlinear irregular unidirectional wave model are investigated. Two seabed profiles of different slopes are considered. Morison’s equation is used to investigate the forcing from fully nonlinear irregular waves and to compare the results with those obtained from linear wave theory and with stream function wave theory. The latter of these theories is only valid on a flat bed. The three predictions of wave forces are compared and the influence of the bed slope is investigated. Force-profiles of two selected waves from the irregular wave train are further compared with the corresponding forceprofiles from stream function theory. The results suggest that the nonlinear irregular waves give rise to larger extreme wave forces than those predicted by linear theory and that a steeper bed slope increases the wave forces both for linear and nonlinear waves. It is further found that stream function theory in some cases underestimate the wave forces acting on the monopile.

AB - Forces on a monopile from a nonlinear irregular unidirectional wave model are investigated. Two seabed profiles of different slopes are considered. Morison’s equation is used to investigate the forcing from fully nonlinear irregular waves and to compare the results with those obtained from linear wave theory and with stream function wave theory. The latter of these theories is only valid on a flat bed. The three predictions of wave forces are compared and the influence of the bed slope is investigated. Force-profiles of two selected waves from the irregular wave train are further compared with the corresponding forceprofiles from stream function theory. The results suggest that the nonlinear irregular waves give rise to larger extreme wave forces than those predicted by linear theory and that a steeper bed slope increases the wave forces both for linear and nonlinear waves. It is further found that stream function theory in some cases underestimate the wave forces acting on the monopile.

M3 - Article in proceedings

SN - 9780791844373

VL - 5

SP - 581

EP - 588

BT - Proceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering

T2 - Proceedings of the ASME 30th 2011 International Conference on Ocean, Offshore and Arctic Engineering

PB - American Society of Mechanical Engineers

ER -