Searched for: subject%3A%22High%255C%2BTech%255C%2BMaritime%255C%2Band%255C%2BOffshore%255C%2BSystems%22
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Park, S.J. (author), Lee, K. (author), Choung, J. (author), Walters, C.L. (author)
This study deals with ductile fracture prediction of a marine steel using new damage functions. The stress triaxiality and Lode angle are known to be governing parameters on the ductile fracture. Recent research has reported that loading path is also one of the important parameters. A three-dimensional fracture strain surface for EH36 steel was...
article 2018
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Kastelein, R.A. (author), Helder-Hoek, L. (author), Gransier, R. (author), Terhune, J.M. (author), Jennings, N. (author), de Jong, C.A.F. (author)
Acoustic mitigation devices (AMDs) are used to deter marine mammals from construction sites to prevent hearing injury by offshore pile-driving noise. In order to quantify the distance at which AMDs designed as ‘seal scarers’ are detected by seals, the 50% hearing thresholds for playbacks of their sounds were determined. The broadband hearing...
article 2015
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Dragt, R.C. (author), Van Den Heuvel, W. (author), Gelinck, E.R.M. (author), Slot, H.M. (author)
In the offshore industry, fibre reinforced sliding journal bearings are increasingly used due to their low-maintenance and self-lubricating characteristics. To be able to use the bearings in the rough offshore environment, under heavy loading, full scale tests are essential to assess the friction and wear rate development during use. For this...
conference paper 2015
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Pereboom, H.P. (author), van Beek, P.J.G. (author), Pijpers, R.J.M. (author), MacDonald, K. (author)
High cycle fatigue failure is likely to occur when a rather undamped offshore installation is operated over a long period of time. Especially welded parts are vulnerable to fluctuating stress ranges, if the structural components, such as the small bore side branches, are loaded in resonance. In particular, the welded connections at e.g. tie-in...
conference paper 2015
document
Kastelein, R.A. (author), Hoek, L. (author), Gransier, R. (author), de Jong, C.A.F. (author), Terhune, J.M. (author), Jennings, N. (author)
Acoustic Mitigation Devices (AMDs) are used to deter marine mammals from construction sites, in order to prevent hearing injury by offshore pile driving noise. To estimate the distance at which two AMDs designed as ‘seal scarers’ (Ace Aquatec and Lofitech) are detected by harbor porpoises, the 50% hearing detection thresholds for playbacks of...
article 2015
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Rahm, M. (author), Hiltz, J. (author), van der Wal, R. (author), Hertzberg, T. (author), Lindström, J. (author)
For three years Canada, Sweden and the Netherlands have been investigating new technologies for fire suppression on board naval crafts within the FiST project. The project has focused on a number of technologies. These included the evaluation of water based fire suppression systems and in particular the efficacy of such systems when damaged....
conference paper 2014
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Ainslie, M.A. (author), Dahl, P.H. (author), de Jong, C.A.F. (author), Laws, R.M. (author)
Geometrical spreading laws are widely used in underwater acoustics because they provide - if chosen carefully - an accuracy that is sufficient for many applications (source characterisation, impact assessment, sound mapping, regulation) for negligible computation time. The simplest and most widely used form is that corresponding to spherical...
conference paper 2014
document
Huntera, A. (author), Fillingera, L. (author), Clarijs, M. (author)
In December 2013, TNO made underwater measurements in Aruba to assess the feasibility of reef health monitoring using passive acoustics; this work was conducted in collaboration with Aruba Ports Authority, Aruba Marine Park, and Aruba Reef Care Foundation. Ambient noise recordings were made at various locations around the reef over a period of...
conference paper 2014
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Walters, C.L. (author), Przydatek, J. (author)
It is vely well-known that fracture toughness depends on loading rate. Higher strain rates can shift the ductile to brittle transition curve to higher temperatures, resulting in a more brittle structure at the same temperature. However, there is little effort to relate the testing rate to the loading rate within the offshore and maritime...
conference paper 2014
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Sertlek, H.O. (author), Aarts, G. (author), Brasseur, S. (author), Slabbekoorn, H. (author), ten Cate, C. (author), von Benda-Beckmann, A.M. (author), Ainslie, M.A. (author)
Regulations for protecting and preserving the marine environment (e.g. in the USA and EU) often require investigating the potential effect of anthropogenic sound on marine life. The origin of underwater sound can be natural as well as anthropogenic. To assess the potential importance of various types of sounds, we constructed sound maps for the...
conference paper 2014
document
Walters, C.L. (author)
Simulation of failure in plate materials (represented as shell elements) is critical for the correct determination of crash performance of ships and offshore structures. This need has traditionally been filled with failure loci that give the failure strain in terms of stress triaxiality. In recent years, a third dimension (Lode parameter) has...
conference paper 2014
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Voormeeren, L.O. (author), Atli-Veltin, B. (author), Vredeveldt, A.W. (author)
The increasing use of liquefied natural gas (LNG) as bunker fuel in ships, calls for an elaborate study regarding the risks involved. One particular issue is the vulnerability of cryogenic LNG storage tanks with respect to impact loadings, such as ship collisions and dropped objects. This requires an understanding of the impact resistance of the...
conference paper 2014
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van der Horst, M.P. (author), Kaminski, M.L. (author), Lepelaars, E.S.A.M. (author)
Growing applications of high strength steels, which are more sensitive to fatigue, harsher operative environments, and increasing economic value of ship- And offshore structures, such as FPSOs and FLNGs, increase the need for asset integrity management systems. Presently, there are many nondestructive testing methods available. Magnetic methods...
conference paper 2014
document
Walters, C.L. (author)
It is well-known that for fracture, ferritic steels undergo a sudden transition from ductile behavior at higher temperatures to brittle cleavage failure at lower temperatures. However, this phenomenon has not received much attention in the literature on fatigue. The so-called Fatigue Ductile-Brittle Transition (FDBT) has been identified in the...
article 2014
document
Binnerts, B. (author), von Benda-Beckmann, A.M. (author), van Beek, P.J.G. (author)
In the oil & gas industry there is a trend towards more subsea activities. To improve gas recovery from existing and new fields at greater depths, the produced gas will be compressed, processed and transported via subsea templates and underwater networks (pipelines, flexible risers, etc.). Besides the huge consequences for the subsea...
conference paper 2014
document
Voormeeren, L.O. (author), Tang, L. (author), Walters, C.L. (author), Vredeveldt, A.W. (author)
Crash analysis in the maritime and offshore industry typically relies on failure criteria that are based only on uniaxial states of stress. However, it is well known that the failure strain depends on the state of stress, and the state of stress in ship collisions is not necessarily uniaxial. Although more detailed failure models are routine in...
conference paper 2014
document
Colin, M.E.G.D. (author), Binnerts, B. (author), Ainslie, M.A. (author), Benda-Beckmann, A.M. (author), Booth, C. (author), Bouton, N. (author), Harris, C.M. (author), de Jong, C.A.F. (author), Sertlek, H.O. (author), Slabbekoorn, H.W. (author)
There is an increasing concern that anthropogenic underwater noise may have a negative impact on marine life. Governmental authorities are introducing regulations to address this problem. The European Commission, for instance, has adopted the Marine Strategy Framework Directive requiring EU Member States to achieve or maintain Good Environmental...
conference paper 2014
document
Walters, C.L. (author)
public lecture 2014
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Walters, C.L. (author), Dragt, R.C. (author), Romeijn, E. (author), van der Weijde, G.D. (author)
In this paper, the applicability of currently-available S355 and S690 steels to Arctic applications is estimated according to current classification rules. A database of results used for quality control for offshore structures that were not necessarily designed for Arctic operations was analyzed. The results needed to be extrapolated to lower...
conference paper 2014
document
Tang, L. (author), Walters, C.L. (author)
Cleavage fracture of steel is governed by micromechanical mechanisms, but it is modelled with simple continuumlevel models. These models are starting to reach the limits of their applicability, so there is interest to look deeper into micromechanical modelling of fracture processes. In order to model fracture on the microstructural level, a...
article 2014
Searched for: subject%3A%22High%255C%2BTech%255C%2BMaritime%255C%2Band%255C%2BOffshore%255C%2BSystems%22
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