工程可靠性与随机力学国际联合研究中心

2023年第11期（总第73期）学术报告

工程力学研究中心第20期报告

文远讲坛272期

报告主题

TOPIC

海上风力发电机设计中的若干岩土工程问题

Some geotechnical aspects regarding the design of offshore wind turbines

报告人

SPEAKER

Prof. Lars Andersen

丹麦奥胡斯大学教授、土木与建筑工程系主任

报告时间

TIME

2023年12月14日（周四）上午10:00-11:00

报告地点

VENUE

同济大学土木大楼 A305

主持人

CHAIR

张自立教授、彭勇波教授

报告内容

Abstract

To meet the Sustainability Development Goals of the United Nations, and to reduce the greenhouse gas emission to a level conforming with the Absolute Planetary Boundaries, renewable energy must fully replace fossil fuels within the next few decades, aiming at net-zero emission energy production. From a system-efficiency point-of-view, offshore wind power will be one of the main players in many countries having coastal regions, and countries like Denmark plan to invest in large offshore wind farms for the export of electricity and Power-to-X. This requires wind turbines that are reliable and cost effective.

Despite two decades of dedicated research within the area, offshore wind turbines (OWTs) and their foundations are today still designed using an approach where the geotechnical aspects are largely treated separately from the design of the turbine itself. An integrated design approach, accounting for the correct soil–structure interaction in the load simulation, may be advantageous to avoid sub-optimization of the OWTs and their foundations. Also, a potential may exist for a better utilization of the soil data obtained by the experimental site assessment campaigns carried out before and during the design and installation of the wind farms. This could reduce the number of tests necessary to obtain a reliable soil model.

Within this context, this lecture will address the geotechnical aspects related to the design of OWTs. This will include the statistical treatment of soil data and how uncertain soil properties can be incorporated into numerical analyses of foundations for OWTs. Further, various approaches to the modelling of monopiles for OWTs will be considered. The overall strategy and appropriateness of the models will be discussed with focus on the static and dynamic soil–structure interaction as well as the possibility of analysing the structural performance of the foundation system.

报告人简介

Speaker Bio

Lars Vabbersgaard Andersen, b. 1975, is MSc in Structural and Civil Engineering from Aalborg University, 1999. He graduated as PhD in Civil Engineering after defending his thesis “Wave Propagation in Infinite Structures and Media” at Aalborg University, 2002. After three years as Assistant Professor in Coastal Engineering, he became Associate Professor in Geotechnical Engineering, at Department of Civil Engineering, Aalborg University, Denmark. In 2017, he was appointed Full Professor of Computational Methods in Civil Engineering at Department of Engineering, Aarhus University. After a major reorganization of the faculty, Prof. Andersen was Head of Section for Structural Engineering within the newly formed Department of Civil and Architectural Engineering 2021–22, building up a new organization.

Prof. Andersen’s main fields of teaching and research are numerical methods, ground vibration and building acoustics, timber structures, soil–structure interaction, and offshore wind. He has supervised 20 PhD students and more than 75 MSc students within these areas, and he has published over 150 papers in high-ranking scientific journals and international conference proceedings. He has been involved in several research projects focused on the cost reduction of foundations for offshore wind turbines as well as dynamic soil–structure interaction, building acoustics, and timber structures.