KaMeWa type water-jet hydrofoil motion mathematic model for navigation simulator

Abstract

The invention relates to the establishment of ship motion mathematic models for navigation simulators, in particular to the establishment of a KaMeWa type water-jet hydrofoil motion mathematic model for navigation simulator. Firstly, a calculation method for a hydrofoil lift force, a hydrofoil attack angle and a hydrofoil inertia force considering free surface effect of hydrofoil is established according to the hydrodynamic characteristic of hydrofoil, then a calculation method for the wave surface at hydrofoil is established considering the interference of outside wind and waves, and a ship body parameter of buoyant center position, buoyancy, water plane area and waterline length are calculated in real time in the condition of variable draft. The model also comprises a method for calculating the hydrodynamic force of a KaMeWa type water-jet unit of an inverted navigation bailing bucket. By adopting the mathematic model, the requirements of the navigation simulator operating the KaMeWa type water-jet hydrofoil in the conditions of various operation situations and interference of outside wind and wave in training and scientific research can be met.

Description

technical field [0001] The invention relates to the field of building a ship motion mathematical model in a navigation simulator, in particular to the building of a KaMeWa type water jet propelled hydrofoil ship's motion hydrodynamic mathematical model. Background technique [0002] The navigation simulator is essentially a human-computer real-time interaction system, which simulates the response of the ship to various operations on the control equipment (that is, the change of the ship's motion state) online through the simulation model, so as to achieve the goal of navigation education or scientific research. Purpose. The change of the ship's motion state is obtained in real time by the model solving program according to the motion mathematical model of each ship, the navigation environment and the ship's operating instructions. Each type of ship has a large structural difference due to different design purposes, resulting in different types of ships having their own mane...

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Problems solved by technology

[0004] It should be pointed out that these studies are all about the performance of a certain aspect of water-jet propulsion hydrofoils, and are carried out for the purpose of ship construction, which also makes it difficult to apply to navigation simulators

As a ship with special structure and performance characteristics, the KaMeWa water jet propulsion hydrofoil vessel cannot continue to apply the modeling methods and empirical formulas of ordinary merchant ships[7-9]

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