“…The aim of many papers is to rank the vessels entering and leaving the restricted channel of multiharbour basins and generate the optimal traffic scheduling schemes for each vessel, to ensure the safety and efficiency of vessel navigation. In these studies, through analysis of the characteristics of a restricted channel in ports, a general structure of a restricted channel in multiharbour basins is proposed, and the key areas of vessel traffic conflict are specified [13,[25][26][27][28][29].…”
Section: Previous Researches Analysis and Definition Of New Trends In...mentioning
Port tugs bring large vessels into the port and take them out of the port, assist them during mooring and unmooring, move vessels from one mooring to another, tilt vessels, tow port barges, transshipment mechanisms, dredgers and other floating objects. Calculation and evaluation methods of the optimal request for tugs bollard pull port operations, are very important in order to guarantee the navigational safety of the port and ships during the main ship operations in the port.
The most dangerous situations are situations of sudden failure of the power plant when maneuvering a vessel in the confined waters of ports, when tugboats become the only means of control that can prevent an accident. This is observed when the vessel moves in an area with hazardous sections of the waterway, calls into and out of the port, as well as when performing mooring operations. Line and / or port pilots, as well as tugs for escorting, escorting or when performing mooring operations of the vessel, are additionally involved in the process of navigating the vessel. In foreign ports, there are also very tense conditions in command management due to language barriers and the need for synergistic interaction of individual independent ship crews without prior preparation for a responsible mission.
In this paper done a focus to improve tug possibilities and decrease navigational risks in port areas by method of balance handling forces. Such decrease in risks at ports is important issue to overcome, since the correct and proper usage of port tugs could highly improve the situation there.
Keywords: tugs, emergency situation, port maneuvering, energy balance of the control force.
“…The aim of many papers is to rank the vessels entering and leaving the restricted channel of multiharbour basins and generate the optimal traffic scheduling schemes for each vessel, to ensure the safety and efficiency of vessel navigation. In these studies, through analysis of the characteristics of a restricted channel in ports, a general structure of a restricted channel in multiharbour basins is proposed, and the key areas of vessel traffic conflict are specified [13,[25][26][27][28][29].…”
Section: Previous Researches Analysis and Definition Of New Trends In...mentioning
Port tugs bring large vessels into the port and take them out of the port, assist them during mooring and unmooring, move vessels from one mooring to another, tilt vessels, tow port barges, transshipment mechanisms, dredgers and other floating objects. Calculation and evaluation methods of the optimal request for tugs bollard pull port operations, are very important in order to guarantee the navigational safety of the port and ships during the main ship operations in the port.
The most dangerous situations are situations of sudden failure of the power plant when maneuvering a vessel in the confined waters of ports, when tugboats become the only means of control that can prevent an accident. This is observed when the vessel moves in an area with hazardous sections of the waterway, calls into and out of the port, as well as when performing mooring operations. Line and / or port pilots, as well as tugs for escorting, escorting or when performing mooring operations of the vessel, are additionally involved in the process of navigating the vessel. In foreign ports, there are also very tense conditions in command management due to language barriers and the need for synergistic interaction of individual independent ship crews without prior preparation for a responsible mission.
In this paper done a focus to improve tug possibilities and decrease navigational risks in port areas by method of balance handling forces. Such decrease in risks at ports is important issue to overcome, since the correct and proper usage of port tugs could highly improve the situation there.
Keywords: tugs, emergency situation, port maneuvering, energy balance of the control force.
“…Considering the pilotage management problem and the tugboat optimization problem involved in the actual vessel scheduling, Abou K., O. et al [14] constructed a vessel scheduling model considering two constraints mentioned above, and designed an accurate solution method. Taking into account the unique water environment of Huanghua Port Coal Terminal, Li J., J et al [15] designed a vessel dispatching optimization model under the compound channel. Based on the waterway ship scheduling model proposed by Lalla-Ruiz E. [16], the vessel scheduling problem in the waterway is restated as a multi-mode resource-constrained project scheduling problem by Hill, A.…”
Section: Related Studiesmentioning
confidence: 99%
“…For example, 'Case_10_1' is case 1 of length 10. 22,7,11,20,5,19,9,17,12,14,1,3,23,24,6,8,16,13,4 Case_20_2 24,4,9,21,7,25,6,13,15,3,12,19,1,18,2,11,14,17,20,5 Case_20_3 15,14,19,1,8,6,9,5,4,24,13,10,16,22,11,...…”
Effective use of port waterways is conducive to enhancing port competitiveness. To minimize the waiting time of ships, improve traffic efficiency, and enhance the applicability of the model to the presence of uncertain factors, a fuzzy scheduling optimization method for ships suitable for one-way waterways is proposed based on fuzzy theory. Considering the ambiguity of the speed of ships entering and exiting the port or the time it takes to cross the channel, the previous research on vessel scheduling on one-way waterways has been extended by introducing a triangular fuzzy number and a method for determining the feasible navigable time window of a ship subject to the tide height constraint was proposed. In this study, the genetic algorithm is used to construct the mathematical model for solving fuzzy vessel scheduling problems based on time optimization, and the minimum delay strategy is used to determine the service sequence. Then, the parameters setting are discussed in detail to find the optimal settings. Finally, an experimental comparative analysis of the randomly generated cases was conducted based on the simulated data. The results show that the designed fuzzy vessel scheduling algorithm reduces the dependence on the port environment, is versatile, and can effectively improve the efficiency of ship schedules and traffic safety compared to other methods. Moreover, it can avoid the problem of the illegal solution occurring in the manual scheduling method.
“…A schematic view of three stages taking place at the port area. To address this issue, port managers usually adopt these strategies: (1) expanding investment, such as channel widening, increasing the number of berths and loading equipment [4]; (2) optimizing the loading operation planning [5]; and (3) scheduling vessel traffic scheme [6]. The first strategy does not provide a solution for all ports, particularly those involving fast-changing market demands in a short period.…”
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