Reduce Geotechnical Risk in Offshore Wind Foundation Design

How soil behaviour, SSI, and cyclic loading are redefining monopile design in the era of 15+ MW turbines

Download this technical whitepaper examining:

Soil–structure interaction (SSI) in large-diameter monopiles
Cyclic degradation and fatigue implications
Installation effects vs design assumptions
Case insights from Hornsea Project One, Borssele Wind Farm, and Hywind Scotland

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Overview

As offshore wind turbines exceed 15 MW and monopile diameters surpass 8–10 m, foundation design is increasingly governed by soil behaviour rather than structural capacity.

Small variations in geotechnical parameters now have measurable engineering impact:

±20–30% variation in stiffness
→ >10% shift in natural frequency
Proximity to 1P / 3P excitation
→ 20–40% increase in fatigue damage
Resulting design changes
→ Significant increases in monopile size and steel tonnage

This whitepaper examines how geotechnical uncertainty propagates through offshore wind design and how it is being addressed in current engineering practice.

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What You’ll Learn

Why SSI governs dynamic response in large monopiles
Where traditional p–y methods are no longer sufficient
How cyclic loading alters soil stiffness and long-term performance
The impact of installation on soil behaviour and stiffness
How leading projects are addressing uncertainty in practice

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This report is especially for engineers and technical specialists involved in:

Offshore wind foundation design
Geotechnical and geophysical engineering
Structural and load analysis
Site investigation and installation

What is geotechnical risk in offshore wind?

What is geotechnical risk in offshore wind?
Geotechnical risk refers to uncertainty in soil properties and behaviour, which affects foundation design, installation, and long-term performance.

Why is SSI important in offshore wind?

SSI governs how loads are transferred into the seabed and directly influences natural frequency, fatigue life, and foundation sizing.

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Tel: +49 30 52001534

E-mail: eq@iqpc.de

Imprint:
Company information according to § 5 Telemediengesetz
IQPC Gesellschaft für Management Konferenzen mbH
Address: Rosenstrasse 2, 10178 Berlin, Germany
Tel: 49 30 52 001 534
E-mail: info@iqpc.de
Registered at: Amtsgericht Charlottenburg, HRB 76720
VAT-Number: DE210454451
Management: Torben Haagh, Richard A. Worden, Michael R. Worden

Impressum:
Firmeninformationen entsprechend § 5 Telemediengesetz
IQPC Gesellschaft für Management Konferenzen mbH
Adresse: Rosenstrasse 2, 10178 Berlin, Germany
Telefonnummer: 030 52001534
Email Adresse: info@iqpc.de
Registereintragungen: Amtsgericht Charlottenburg HRB 76720
Umsatzsteuer- Indentifikationsnummer DE210454451
Geschäftsführung: Torben Haagh, Richard A. Worden, Michael R. Worden