Searched for: author%3A%22Tsetas%2C+A.%22
(1 - 15 of 15)
document
Molenkamp, T. (author), Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
Vibratory offshore pile driving offers a potential solution for reducing the underwater noise generated during the installation of foundation piles compared to using impact hammers. Existing noise prediction models are specifically tailored to impact pile driving scenarios. This paper introduces a novel methodology for underwater noise...
journal article 2024
document
Tsetas, A. (author)
The ambitious goals towards the decarbonization of the global energy sector have amplified the demand for renewable energy resources. Amongst the renewables, offshore wind possesses a pivotal role in this endeavour, showcasing remarkable growth in recent years. However, this rapid expansion has been accompanied by a series of technical...
doctoral thesis 2023
document
Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
This paper presents a computationally efficient model for vibratory pile installation. A semi-analytical finite element (SAFE) model for thin cylindrical shells is derived to represent the pile. The linear dynamic response of the soil medium is described by means of Green's functions via the Thin-Layer Method (TLM) coupled with Perfectly...
journal article 2023
document
Kementzetzidis, E. (author), Pisano, F. (author), Tsetas, A. (author), Metrikine, A. (author)
Gentle driving of piles (GDP) is a new technology for the vibratory installation of tubular (mono) piles that aims to achieve both efficient installation and low noise emission by combining axial and torsional vibrations. To provide a preliminary demonstration of the GDP concept, onshore medium-scale tests in sand were performed in late 2019...
journal article 2023
document
Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
In this paper, the characteristics of the induced ground motion are studied for two pile installation methods. Specifically, the classical axial vibratory driving is compared with the Gentle Driving of Piles (GDP) method, to investigate the effect of high-frequency torsional excitation in the soil response. For that purpose, a non-linear 3-D...
conference paper 2023
document
Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
Gentle Driving of Piles (GDP) is a new vibratory installation technology for tubular (mono)piles. It is characterized by the simultaneous application of low-frequency axial and high-frequency torsional vibrations, envisaged to achieve both high installation performance and reduced underwater noise emissions. The concept of GDP has been...
journal article 2023
document
Tsetas, A. (author), Tsouvalas, A. (author), Sánchez Gómez, S. (author), Pisano, F. (author), Kementzetzidis, Evangelos (author), Molenkamp, T. (author), Elkadi, A.S.K. (author), Metrikine, A. (author)
Gentle Driving of Piles (GDP) is a new technology for the vibratory installation of tubular (mono)piles. Its founding principle is that both efficient installation and low noise emission can be achieved by applying to the pile a combination of axial and torsional vibrations. Preliminary development and demonstration of the proposed technology...
journal article 2023
document
Sánchez Gómez, S. (author), Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
For offshore wind turbines (OWTs), the monopile comprises the most common type of foundation and vibratory driving is one of the main techniques for monopile installation (and decommissioning). In practice, prior to pile installation, a pile driving analysis is performed to select the appropriate installation device and the relevant settings....
conference paper 2023
document
Tsetas, A. (author), Tsouvalas, A. (author), Molenkamp, T. (author), Metrikine, A. (author)
In the original publication, Eqs. (11) and (17) are published incorrectly, and this has been corrected as follows: (Formula presented.) The original article has been revised.
journal article 2022
document
Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
The Alternating Frequency-Time (AFT) Harmonic Balance method has been widely applied in the analysis of non-linear mechanical systems under periodic excitation. Customarily, a periodic displacement is considered as ansatz in a harmonic balance analysis. In the present work, a deviation from the latter ansatz is realized and the periodicity is...
conference paper 2022
document
Tsetas, A. (author), Tsouvalas, A. (author), Molenkamp, T. (author), Metrikine, A. (author)
This paper presents a computationally efficient mode-matching method to predict the relative axial motion of two elastic rods in frictional contact. The motion is of the stick-slip type and is non-uniform along the rods. The proposed method utilizes the piecewise linearity of the problem in time and space. The original set of nonlinear...
journal article 2022
document
Sánchez Gómez, S. (author), Tsetas, A. (author), Metrikine, A. (author)
In this paper, the energy flux in a pile modeled as an elastic shell, is studied theoretically and experimentally. Based on this analysis, a new procedure is proposed to quantify the pile installation efficiency. This procedure is of importance for vibratory installation of the foundations of offshore wind turbines and it is believed to be...
journal article 2022
document
Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
During the last decade the offshore wind industry grew ceaselessly and engineering challenges continuously arose in that area. Installation of foundation piles, known as monopiles, is one of the most critical phases in the construction of offshore wind farms. Prior to installation a drivability study is performed, by means of pile driving...
journal article 2021
document
Molenkamp, T. (author), Tsetas, A. (author), Tsouvalas, A. (author), Metrikine, A. (author)
In this paper, a new model is developed to describe the nonlinear dynamics of twoaxially deformable bars sliding relative to each other in which the interaction is governed byfriction. The first bar is fixed at one end and is subjected to a distributed normal force perpen-dicular to its axis to activate friction at the common interface, while...
conference paper 2020
document
Tsetas, A. (author), Sánchez Gómez, S. (author), Tsouvalas, A. (author), van Beek, C. (author), Sadeghi Tehrani, F. (author), Kementzetzidis, E. (author), Pisano, F. (author), Elkadi, A.S.K. (author), Segeren, M.L.A. (author), Molenkamp, T. (author), Metrikine, A. (author)
A novel pile-driving technique, named Gentle Driving of Piles (GDP), that combines axial low-frequency and torsional high-frequency vibrations has been developed and tested recently. During the experimental campaign, several piles were installed onshore, making use of the GDP shaker. Besides those, a number of additional piles were installed...
conference paper 2020
Searched for: author%3A%22Tsetas%2C+A.%22
(1 - 15 of 15)