CRASH: Computerised Prediction of Ship-Platform Collision Risks

Spouge, J R

doi:10.2118/23154-ms

Cited by 3 publications

(3 citation statements)

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“…In this study, the values of P 1 are the same as those in the front-end engineering design (FEED) method and are taken from Spouge (1991). Table 1 presents the values for new platforms (mobile platforms) and platforms that have been in place for a long time (fixed platforms).…”

Section: Collision Diametermentioning

confidence: 99%

Probabilistic approach for collision risk analysis of powered vessel with offshore platforms

2018

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The continuous increase in marine traffic and the construction of several offshore installations has led to a serious concern regarding the risks to offshore platforms from ship collisions. The main aim of this study was to carry out a probabilistic collision-risk analysis for offshore platforms exposed to powered collisions with passing vessels using an automatic identification system (AIS) database. The paper first describes the statistical distribution of the ship traffic under study and then considers how this information can be effectively used to estimate collision frequencies and impact energies for various categories of vessel, based on a simple probabilistic method. The effects of various collision mitigation measures, such as the use of enhanced collision alarming devices and the ability of platforms to rotate using thrusters, are considered in the frequency calculations. The risk method presented in this paper can be applied in the design and development phase of both new and existing platforms.

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Section: Collision Diametermentioning

confidence: 99%

Probabilistic approach for collision risk analysis of powered vessel with offshore platforms

2018

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“…Previous research on modern ship design has now been able to consider several accidents after a collision or develop designs to reduce the impact of a collision. Prediction of the possibility of ship collisions in offshore construction was investigated by using computer simulations [4]. Several studies investigated shipbuilding double-hull designs to increase collision safety by using granular materials [5].…”

Section: Introductionmentioning

confidence: 99%

Development of fishing boat collision models in extreme weather using computer simulation

et al. 2023

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The incidence of fishing boat accidents in Indonesia is very worrying, with 342 people dying during 2018–2020. Based on this, it is crucial to investigate the construction strength of fishing vessels against the possibility of a collision. In this study, the fishing boat due to the impact load was investigated in extreme weather conditions using Finite Element Method (FEM) analysis. Traditional fishing boat was constructed by measuring the thickness of the hull, deck, keel, frames, and longitudinal structure of the fishing boat. The collision model is carried out with an impactor in the form of a mooring pole during extreme weather with a wave height of 6 meters and wind speeds 30 knots. Variations in velocity and frame spacing as in actual conditions are modeled to obtain differences in deformation, absorption energy values, and plasticity of boat construction due to collisions. The collision speed of 30 and 20 knots are set on the extreme weather conditions, while the collision speed of 7 knots is set on operating speed. Frame spacing of 0.5 and 0.6 meters is built according to the boat's frame spacing in the field. Computer simulation is carried out using application software ANSYS Research License. The fishing boat material used is mahogany wood with tested by using impact test with a toughness value of 39.1 kJ/m2. Based on the simulations results, the impact velocity has an effect deformation wider crash area and hull stress value. The speed of the ship collision was 7 knots, the collision did not damage the hull, but the construction failed at speeds of 20 and 30 knots. The closer of frame spacing, the higher collision performance of structure to withstand impact are indicated by the higher energy absorption. At a ship collision speed of 30 knots, the absorption energy of the construction at 0.5-meter frame spacing is 49.8 kJ, greater than 0.6-meter frame spacing with a value of 29.6 kJ

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“…The claim that the presence of offshore petroleum installations has an effect on the traffic pattern and location of shipping lanes has been accepted since the very first allision risk models, by Haugen and Vollen (1989) and Spouge (1991). Nevertheless, it has not been studied sufficiently, nor verified empirically.…”

Section: Introductionmentioning

confidence: 99%

Allision risk analysis of offshore petroleum installations on the Norwegian Continental Shelf—an empirical study of vessel traffic patterns

Hassel

Utne

Vinnem

2016

WMU J Marit Affairs

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The Norwegian Petroleum Safety Authority (PSA) requires offshore petroleum operators on the Norwegian Continental Shelf (NCS) to perform risk assessments of impacts (allisions) between passing ships and offshore installations. These risk assessments provide a basis for defining the allision accidental load that the installation shall be designed for. Even though the risk of allision is small, the potential consequences can be catastrophic. In a worst-case scenario, an allision may result in the total loss of an installation. The ageing industry standard allision risk model, COLLIDE, calculates the risk of impacts between passing (non-field-related) ships and installations based on Automatic Identification System (AIS) data. Both the COLLIDE risk model and a new Bayesian allision risk model currently under development are highly sensitive to variations in vessels' passing distances, especially close proximity passings. Allision risk assessments are typically performed during the design and development phase of an installation, which means that historical AIS data are used Bas is^, disregarding future changes to the traffic pattern when the new installation is placed on a location. This article presents an empirical study of one of the most important variables used to calculate the risk of allision from passing vessels, namely passing distance. The study shows that merchant vessels alter course to achieve a safe passing distance to new surface offshore petroleum installations. This indicates that the results of current allision risk assessments are overly conservative.

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CRASH: Computerised Prediction of Ship-Platform Collision Risks

Cited by 3 publications

References 0 publications

Probabilistic approach for collision risk analysis of powered vessel with offshore platforms

Probabilistic approach for collision risk analysis of powered vessel with offshore platforms

Development of fishing boat collision models in extreme weather using computer simulation

Allision risk analysis of offshore petroleum installations on the Norwegian Continental Shelf—an empirical study of vessel traffic patterns

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