海上交通流シミュレーションを用いた安全対策の評価例(<特集>海上安全イニシアティブ)
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概要
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Marine Traffic Simulation is a ship automatic navigating system which models of automatic avoiding for target ships were incorporated. This simulation system has some models for generating ships, the rules of marine traffic and navigational judgments etc. If simulation input data based on actual conditions are prepared, simulation near actual marine traffic flow can be performed. Automatic Identification System (AIS) has to be equipped to more than 500 gross tonnage for coasters and more than 300 gross tonnage for oceangoing ships. If AIS receivers were installed ashore, the navigational data of ships equipped AIS (AIS data) can be obtained. Then three AIS receivers were installed in the Southern Area of Tokyo-bay and AIS data were collected. The AIS data were analyzed and made some of the input data, such as origin destination (OD) data etc. Simulation for one week was carried out for the Southern Area of Tokyo-bay. Simulation results were compared to results from AIS data to certificate of validation for the simulation. Marine traffic simulation not only can express near actual marine traffic flow, but change of marine traffic can evaluate. Two examples were prepared to evaluate the change of marine traffic. First, OD data were changed and simulated. The simulation results were compared to original simulation results (before results), and collision risks were reduced about 20 %. Second, ship route data were changed and simulated. The simulation results were compared to before results and the rectification effect of marine traffic flow was acquired. Therefore, marine traffic simulation can evaluate the effect of safety measures quantitatively.
- 2012-09-28
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