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Kristjan Tabri
Tallinn University of Technology
CollisionEngineeringFinite element methodGeotechnical engineeringStructural engineering
38Publications
11H-index
469Citations
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Publications 35
Newest
#1Kristjan TabriH-Index: 11
#2Heikki RemesH-Index: 15
#1Kristjan Tabri (Tallinn University of Technology)H-Index: 11
#2Martin Heinvee (Tallinn University of Technology)H-Index: 4
Last. Floris Goerlandt (Dal: Dalhousie University)H-Index: 22
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Abstract The risk of oil spills is an ongoing societal concern. Whereas several decision support systems exist for predicting the fate and drift of spilled oil, there is a lack of accurate models for assessing the amount of oil spilled and its temporal evolution. In order to close this gap, this paper presents an online platform for the fast assessment of tanker grounding accidents in terms of structural damage and time-dependent amount of spilled cargo oil. The simulation platform consists of t...
Source
#1Jonas W. Ringsberg (Chalmers University of Technology)H-Index: 17
#2Jørgen Amdahl (NTNU: Norwegian University of Science and Technology)H-Index: 4
Last. Shengming ZhangH-Index: 12
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This paper presents a benchmark study on collision simulations that was initiated by the MARSTRUCT Virtual Institute. The objective was to compare assumptions, finite element models, modelling techniques and experiences between established researchers within the field. Fifteen research groups world-wide participated in the study. An experiment involving a rigid indenter penetrating a ship-like side structure was used as the case study. A description of how the experiment was performed, the geome...
7 CitationsSource
#1Monika Kollo (Tallinn University of Technology)H-Index: 1
#2Janek Laanearu (Tallinn University of Technology)H-Index: 7
Last. Kristjan Tabri (Tallinn University of Technology)H-Index: 11
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Abstract Hydraulic models for one- and two-layer flows are combined in different oil spill scenarios for tanker accidents. Four oil spill model versions are used to determine oil-leak quantities in six test cases. Five test cases are verified by comparison to the laboratory results of Tavakoli et al. (2011). One test case is presented as a demonstration of the modelling approach developed here. In the hydraulic modelling, it was found that a descending oil surface in the leaking tank yields a un...
4 CitationsSource
#1Otto-Ville Sormunen (Aalto University)H-Index: 5
#2Mihkel Kõrgesaar (Aalto University)H-Index: 7
Last. Pentti Kujala (Aalto University)H-Index: 27
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Abstract Groundings are among the most common and destructive maritime accidents. Sea bottom shape influences greatly what kind of damage the ship structure suffers and whether this leads to loss of water tightness. Sormunen et al. [21] presented and statistically compared rock models used in grounding damage analysis with detailed bottom shape data from two Finnish harbour fairways. The results were promising in terms of statistical fit especially for the binormal rock model, which also showed ...
7 CitationsSource
#1Kristjan TabriH-Index: 11
#2Pentti KujalaH-Index: 27
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Last. Heikki RemesH-Index: 15
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#1Risto Toming (Tallinn University of Technology)
#2Els-Hedvig Kerge (Tallinn University of Technology)
Last. Heikki RemesH-Index: 15
view all 6 authors...
#1Martin Heinvee (Tallinn University of Technology)H-Index: 4
#2Kristjan Tabri (Tallinn University of Technology)H-Index: 11
Abstract This paper presents a set of analytical expressions for the calculation of damage opening sizes in tanker groundings. The simplified formulas were given for the grounding force, longitudinal structural damage and the opening width in the inner and outer plating of a tanker's double bottom. The simplified formulas derived are based on a set of numerical simulations conducted with tankers of different dimensions- 120, 190 and 260 m in length. The simulations were performed for five penetr...
9 CitationsSource
#1Sander Nelis (Aalto University)H-Index: 1
#2Kristjan Tabri (Tallinn University of Technology)H-Index: 11
Last. Pentti Kujala (Aalto University)H-Index: 27
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The maritime transportation system in the Northern Baltic Sea (NBS) is complex and operates under varying environmental conditions. The most challenging conditions relate to the presence of ice-cover, which for the NBS e.g. for the Gulf of Finland or Bay of Bothnia, can remain up to several months. The number of maritime accidents in these two areas is the highest during winter season, which can involve accidents like groundings, collisions, damages due to the ice etc. The paper presents the mod...
4 CitationsSource
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