Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Bernt Johan Leira"'
Autor:
Mojtaba Mokhtari, Bernt Johan Leira
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 6, p 1021 (2024)
In marine engineering, understanding the compressive behaviour of ice is crucial for accurately modelling ice loads on ships and offshore structures in ice-prone waters. Over the past few decades, numerous studies have focused on numerically simulati
Externí odkaz:
https://doaj.org/article/fe856a86313a46b9b0f89ceace7c04bb
Publikováno v:
Brodogradnja, Vol 74, Iss 1, Pp 99-115 (2023)
Ship hull vibration is a major contributor to fatigue crack growth and main engine excitation is identified as an important vibration source. A general method to solve any vibration problem arising onboard a ship does not exist, which encourages the
Externí odkaz:
https://doaj.org/article/eab339371dce4f3986b4e82b0cc13228
Autor:
Weidong Zhao, Bernt Johan Leira, Knut Vilhelm Høyland, Ekaterina Kim, Guoqing Feng, Huilong Ren
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 4, p 611 (2024)
This paper presents a framework for structural analysis of icebreakers during ramming of first-year ice ridges. The framework links the ice-ridge load and the structural analysis based on the physical characteristics of ship–ice-ridge interactions.
Externí odkaz:
https://doaj.org/article/35979a073fe64748ad897ce3054e6e36
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 9, p 1797 (2023)
Three-dimensional path planning is instrumental in path decision making and obstacle avoidance for deep-sea mining vehicles (DSMV). However, conventional particle swarm algorithms have been prone to trapping in local optima and have slow convergence
Externí odkaz:
https://doaj.org/article/fd68c6a95fc2461e8b9dbc1175983755
Publikováno v:
Nordic Journal of STEM Education, Vol 4, Iss 2 (2021)
This paper reports on an action research study on curriculum design in an optional module at the Norwegian University of Science and Technology. There were two professors teaching their respective parts, henceforth termed “Part 1” and “Part 2
Externí odkaz:
https://doaj.org/article/17793ef670d14a40943dc08d60143f8f
Publikováno v:
Mechanical systems and signal processing
In marine operations, the performance of model-based automatic control design and decision support systems highly relies on the accuracy of the representative mathematical models. Model fidelity can be crucial for safe voyages and offshore operations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::011db086258ca9c0e92169cf11423936
https://hdl.handle.net/11250/3035216
https://hdl.handle.net/11250/3035216
Autor:
Martin Bergström, Thomas Browne, Sören Ehlers, Inari Helle, Hauke Herrnring, Faisal Khan, Jan Kubiczek, Pentti Kujala, Mihkel Kõrgesaar, Bernt Johan Leira, Tuuli Parviainen, Arttu Polojärvi, Mikko Suominen, Rocky Taylor, Jukka Tuhkuri, Jarno Vanhatalo, Brian Veitch
Publikováno v:
Ship Technology Research 69 (3): 129-157 (2022)
While society benefits from Arctic shipping, it is necessary to recognize that ship operations in Arctic waters pose significant risks to people, the environment, and property. To support the management of those risks, this article presents a compreh
Publikováno v:
Engineering structures
Fjord-crossing floating bridges are sophisticated structures subjected to complex environmental loadings including combined action of wave and current. However, the effect of wave-current action is often neglected in a conventional engineering practi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10f371750d07ae52d141bb695a778e52
https://hdl.handle.net/11250/3013542
https://hdl.handle.net/11250/3013542
Autor:
Martin Bergström, Thomas Browne, Sören Ehlers, Inari Helle, Hauke Herrnring, Faisal Khan, Jan Kubiczek, Pentti Kujala, Mihkel Kõrgesaar, Bernt Johan Leira, Tuuli Parviainen, Arttu Polojärvi, Mikko Suominen, Rocky Taylor, Jukka Tuhkuri, Jarno Vanhatalo, Brian Veitch
Publikováno v:
Volume 6: Polar and Arctic Sciences and Technology.
Arctic shipping is growing driven by a demand for natural resources, climate change, and technological development, among other factors. While this provides many benefits for society, it also entails risks for people, the environment, and property. T
Autor:
Weidong Zhao, Bernt Johan Leira, Knut Vilhelm Høyland, Ekaterina Kim, Guoqing Feng, Zhanyang Chen, Hongbin Gui
Publikováno v:
Volume 6: Polar and Arctic Sciences and Technology.
Sea ice ridges, formed by compression or shear in the ice cover, bring additional challenges to the structural safety of icebreakers navigating in polar regions. The purpose of this work is to carry out the structural analysis of an icebreaker during