Abstract
Objective. The article deals with aspects of modeling the working processes occurring in marine thrusters of amphibious vehicles, taking into account the specifics of their operation. Methods. The methods of 3D modeling of propellers in CAD and CAE packages are applied, which can determine and optimize the parameters of ongoing work processes with reliable accuracy. Results. A mathematical construct is proposed that allows calculating the characteristics of marine thrusters of amphibious vehicles. The propeller is designed to provide more thrust compared to the original design, making it possible to increase the speed of movement on the water and reduce the radius of circulation when moving through the water. The calculated version of the propeller provides an increase in thrust by 36%, allows developing a high speed on the water, and significantly reduces the radius of circulation of the ferry-bridge machine when maneuvering on the water. Conclusion. The proposed option for increasing the speed and maneuverability of ferry vehicles on the water is the most effective and least expensive; a promising direction for further research to achieve maximum efficiency is the creation and verification of software, hardware, and methodological complexes for modeling the joint operation of the "marine thruster - hull - power plant" system.
Highlights
The article deals with aspects of modeling the working processes occurring in marine thrusters of amphibious vehicles, taking into account the specifics of their operation
A mathematical construct is proposed that allows calculating the characteristics of marine thrusters of amphibious vehicles
The propeller is designed to provide more thrust compared to the original design, making it possible to increase the speed of movement on the water and reduce the radius of circulation when moving through the water
Summary
Повышение скоростных характеристик можно обеспечить несколькими путями: изменение параметров водоходного движителя, уменьшение сопротивления паромной техники за счет изменения обводов корпуса машины в сочетании повышением мощностных характеристик двигателя. Параметры водоходного движителя определяются с учетом полного сопротивления и буксировочной мощности корпуса ПММ [2 - 4] на основе исходных данных, к которым относятся габаритные размеры и значение осадки ПММ (табл.1). Величину смоченной поверхности корпуса ПММ необходимо определять с наиболее возможной точностью, поскольку сопротивление движению изменяется прямо пропорционально величине смоченной поверхности, при этом очевидно, что поверхность подводной части данной машины нельзя представить в виде явной функции от координат, вычислить её площадь аналитически невозможно, поэтому для вычисления смоченной поверхности необходимо применять приближённые методы расчета.
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