Finite element damage analysis of an underwater glider–ship collision

Drücker, Sven; Steglich, D.; Merckelbach, Lucas; Werner, Albert H.; Bargmann, Swantje

doi:10.1007/s00773-015-0349-7

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…Intense commercial and recreational shipping traffic significantly increases the likelihood of a glider-ship collision (Merckelbach, 2013). This will almost certainly result in the loss of the glider and possibly in a hull rupture, if a fast lightweight craft is involved (Drücker et al, 2015). Therefore, COSYNA collaborates closely with the authority responsible for safety regulations in the German sector of the North Sea (Wasser-und Schifffahrtsamt) to develop prediction methodologies to mitigate the risk at sea involving gliders (Merckelbach, 2016).…”

Section: Ocean Glidersmentioning

confidence: 99%

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

et al. 2017

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Abstract. The Coastal Observing System for Northern and Arctic Seas (COSYNA) was established in order to better understand the complex interdisciplinary processes of northern seas and the Arctic coasts in a changing environment. Particular focus is given to the German Bight in the North Sea as a prime example of a heavily used coastal area, and Svalbard as an example of an Arctic coast that is under strong pressure due to global change.The COSYNA automated observing and modelling system is designed to monitor real-time conditions and provide short-term forecasts, data, and data products to help assess the impact of anthropogenically induced change. Observations are carried out by combining satellite and radar remote sensing with various in situ platforms. Novel sensors, instruments, and algorithms are developed to further improve the understanding of the interdisciplinary interactions between physics, biogeochemistry, and the ecology of coastal seas. New modelling and data assimilation techniques are used to integrate observations and models in a quasi-operational system providing descriptions and forecasts of key hydrographic variables.

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Section: Ocean Glidersmentioning

confidence: 99%

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

et al. 2017

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“…Methods have been developed in order to plan trajectories for optimal sampling purposes (e.g. Garau et al, 2009) or to reconstruct the underwater trajectory to localise the data that are gathered by the glider (e.g. Smith et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…This involves the application for permission to run gliders in a given region within a certain time frame. Since there is a risk of a ship-glider collision (Merckelbach, 2013), which may damage vulnerable fast off-shore vessels (Drücker et al, 2015), WSA requires mitigating measures to be taken by providing the German Vessel Traffic Control Centre (Seewarndienst) with 12-hourly forecasts of the region where the glider will be, given by the four coordinates defining a rectangle. The system that has been set up to provide these forecasts (not discussed herein) relies on a model simulating the behaviour of the glider by emulating the glider software and hardware, as well as modelling the dynamics (i.e.…”

Section: Introductionmentioning

confidence: 99%

Depth-averaged instantaneous currents in a tidally dominated shelf sea from glider observations

Merckelbach

2016

Biogeosciences

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Abstract. Ocean gliders have become ubiquitous observation platforms in the ocean in recent years. They are also increasingly used in coastal environments. The coastal observatory system COSYNA has pioneered the use of gliders in the North Sea, a shallow tidally energetic shelf sea. For operational reasons, the gliders operated in the North Sea are programmed to resurface every 3–5 h. The glider's dead-reckoning algorithm yields depth-averaged currents, averaged in time over each subsurface interval. Under operational conditions these averaged currents are a poor approximation of the instantaneous tidal current. In this work an algorithm is developed that estimates the instantaneous current (tidal and residual) from glider observations only. The algorithm uses a first-order Butterworth low pass filter to estimate the residual current component, and a Kalman filter based on the linear shallow water equations for the tidal component. A comparison of data from a glider experiment with current data from an acoustic Doppler current profilers deployed nearby shows that the standard deviations for the east and north current components are better than 7 cm s−1 in near-real-time mode and improve to better than 6 cm s−1 in delayed mode, where the filters can be run forward and backward. In the near-real-time mode the algorithm provides estimates of the currents that the glider is expected to encounter during its next few dives. Combined with a behavioural and dynamic model of the glider, this yields predicted trajectories, the information of which is incorporated in warning messages issued to ships by the (German) authorities. In delayed mode the algorithm produces useful estimates of the depth-averaged currents, which can be used in (process-based) analyses in case no other source of measured current information is available.

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“…CC-BY 3.0 License. certainly result in the loss of the glider and possibly in a hull rupture, if a fast light-weight craft is involved(Drücker et al, 2015). Therefore, COSYNA collaborates closely with the authority responsible for safety regulations in the German sector of the North Sea (Wasserund Schifffahrtsamt) to develop prediction methodologies to mitigate the risk at sea involving gliders(Merckelbach, this issue).…”

mentioning

confidence: 99%

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

Baschek¹,

Schroeder²,

Brix³

et al. 2016

Preprint

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Abstract. The Coastal Observing System for Northern and Arctic Seas (COSYNA) was established in order to better understand the complex interdisciplinary processes of northern seas and the arctic coasts in a changing environment. Particular focus is given to the German Bight in the North Sea as a prime example for a heavily used coastal area, and Svalbard as an example of an arctic coast that is under strong pressure due to global change. The automated observing and modelling system COSYNA is designed to monitor real time conditions, provide short-term forecasts and data products, and to assess the impact of anthropogenically induced change. Observations are carried out combining satellite and radar remote sensing with various in situ platforms. Novel sensors, instruments, and algorithms are developed to further improve the understanding of the interdisciplinary interactions between physics, biogeochemistry, and the ecology of coastal seas. New modelling and data assimilation techniques are used to integrate observations and models in a quasi-operational system providing descriptions and forecasts of key hydrographic variables. Data and data products are publically available free of charge and in real time. They are used by multiple interest groups in science, agencies, politics, industry, and the public.

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Finite element damage analysis of an underwater glider–ship collision

Cited by 10 publications

References 14 publications

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

Depth-averaged instantaneous currents in a tidally dominated shelf sea from glider observations

The Coastal Observing System for Northern and Arctic Seas (COSYNA)

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