Fatigue Assessment of Complex Riveted Connections: A study on old steel bridges using Advanced Finite Element Analysis

Numerous traffic bridges have been constructed over the last 150 years. Because bridges are commonly built based on an expected lifetime of 75 to 100 years, a large quantity of bridges are reaching the end of their design lifetime, or even are far overdue. To ensure these bridges remain operational without experiencing catastrophic failures,...

Installation of perforated monopiles: And the associated fatigue damage

The European offshore wind industry has experienced significant growth in the past decade, mainly focusing on shallow areas in the North Sea to reduce the Levelised Cost of Electricity (LCoE) and compete with fossil fuels. However, as shallow areas become scarcer and the industry seeks greater independence from government subsidies, a shift...

A Finite Element Analysis Investigation of Fatigue and Corrosion of Floating Offshore Wind Turbine Mooring Lines

With the rising demand for renewable energy, floating offshore wind turbines have gained importance, particularly in regions where deep waters prevent the use of traditional monopile structures. These floating turbines rely on mooring lines for stability against environmental conditions, particularly when facing strong winds and high waves....

Advantages and Challenges of Perforated Monopiles in Deep Water Sites: Comprehensive study of stress concentrations and fatigue loads of monopile foundations in deep water sites

The potential for developing more efficient offshore wind support structures becomes increasingly critical as the offshore wind sector is faced with challenges such as rising commodity prices and shrinking profit margins. These challenges not only impact the industry’s capacity to meet growing global demand but also hinder efforts to address the...

Examining Fatigue and Discomfort: Assessing the Impact of Innovative Technologies on Car Seat

The objective of this project is to examine the effects of new technology in car seats on fatigue and discomfort. The first step involves defining the fatigue framework and selecting an appropriate assessment method. Since different studies suggest that the definition of fatigue can vary in different situations, a street interview was conducted...

Inertial and Frequency Response of an Offshore Wind Turbine: Effect on Extreme and Fatigue Loads

The replacement of conventional generation units with variable renewable energy sources could have a negative impact on the balance of supply and demand of electricity. Moreover, since the variable renewable energy sources are inverter based and therefore decoupled from the grid, the overall grid inertia will decrease. To solve this problem, the...

Characterization of High Fiber Volume Fraction Glass Pultruded Plates for Wind Turbine Blades

In recent years, the wind energy industry shows more and more interest in composite materials manufactured with a new process called pultrusion. The advantage of pultruded composite plates includes high fiber volume fraction, low price and simplified blade manufacturing. However, pultruded plates are fully cured and crosslinking is absent at...

Fatigue Load Emulation of Offshore Wind Turbines Using Advanced Surrogate Models

Understanding the fatigue load history of wind turbines is critical for taking decisions regarding the lifetime of a project. However, direct measurement of fatigue loads at each turbine in a wind farm is unfeasible. For this reason, surrogate models offer a useful alternative. In this thesis, a methodology for creating surrogate models for...

Multi-axial fatigue assessment of a lemniscate crane

The main purpose of this report is to investigate flaws within Cornelis Tromp 25T lemniscate crane upper arm joint. This is done in order to figure out why the joint structure is experiencing significant crack propagation and what potentially could have led to a structural joint failure and death of an operator within a crane of the same model....

Frequency Domain Fatigue Analysis of Offshore Wind Monopile Support Structure: For the Purpose of Offshore Wind Farm Optimization

The preliminary design of wind turbine support structures within an offshore wind farm plays a significant role in decreasing the costs involved and is pivotal in establishing the wind sector as a leading contributor towards a sustainable future. During the early design stages, the optimization of structural dimensions, which involves a large...

Exploration of LiDAR measured turbulence via met mast comparison, fatigue analysis & Measure Correlate Predict

Several factors play a role in the ongoing process of the acceptance and eventual universal use of LiDAR remote sensing technology in wind site assessment. Especially turbulence parameter 푇퐼 is still giving food for thought. Three important aspects of LiDAR measured 푇퐼 that are considered key are picked out and feature in this work, which...

Fatigue analysis for offshore power cable installation

Over the last decade, the demand for offshore power cables has increased significantly due to, in particularly, the emergence of offshore wind. Despite this growth, industry-wide rules and guidelines to analyse fatigue during cable installation operations are yet to be developed, even though fatigue can become an important...

Mitigation of Ice-induced vibrations of Offshore Wind Turbines by Control Idling

Offshore wind farms are being developed at locations with moderate ice conditions such as the Baltic Sea, where drifting sea ice upon interacting with offshore structures could lead to the development of a phenomenon known as Ice-induced vibrations (IIV). These vibrations are especially severe when the turbine is idling. Current mitigation...

Investigation of Wind Turbine Fatigue Loads under Wind Farm Control: Analysis of Field Measurements

Wind energy is one of the most promising sources of renewable energy and has experienced a very rapid growth in the last 15 years. In order to maintain and sustain this growth wind energy needs to be competitive with the other sources of energy, especially with fossil fuels. A major factor keeping the competitiveness of wind energy is the...

Defining a solid approach for designing a bridge landing against fatigue

Offshore oil and gas projects usually require the presence of more than one facilities in the same location. These facilities need to be connected with each other in order to enable the transfer of personnel among each other. As a result, bridges are implemented for such purposes with their ends being positioned at extensions of the two...

Optimal Wind Farm Lifetime Power Production

This project is a collaboration between Goldwind, Technical University of Denmark (DTU) and Delft University of Technology (TUDelft), of which focusing in developing an optimization model that could determinate the optimal operation schedule for wind turbine under the uncertainty of the electricity price and limitation in life-time equivalent...

Fatigue analysis of discharge area of 26kl tank container under railway transportation

Tank containers are intermodal containers for the transport of liquids, gases, and powders as bulk cargo However, hazardous vibration during transportation would generate fatigue damage at discharge area. This thesis aims at calculating fatigue damage at discharge area of a specified tank container. <br/><br/>The calculation is performed in time...

Structural Optimization of the Monopile Installation Frame Design

Wind energy plays an important role in the global energy supply and is obtained by wind turbines placed on- and offshore. The expected growth of offshore wind farms will generate a lot of work in the future. Seaway Heavy Lifting is an offshore company which offers Engineering, Procurement, Construction and Installation (EPCI) solutions worldwide...