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

A water-jet propulsion and mathematical model technology, applied in the field of ship motion mathematical model construction, can solve the problems that ordinary merchant ship modeling methods and empirical formulas cannot continue to be applicable, and it is difficult to apply navigation simulators

Inactive Publication Date: 2009-12-30
DALIAN MARITIME UNIVERSITY
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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...

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

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0046] 1. Mathematical model of heave and pitch motion of KaMeWa water jet propulsion hydrofoil

[0047] Taking the center of gravity of the hull as the origin of the coordinate system, establish as figure 1 The attached body coordinate system is shown. Considering the hull as a rigid body, considering the influence of ship trim and waves on ship motion, the mathematical model of heave and pitch motion can be obtained as follows

[0048] m ( ξ · · + u θ · ) = ...

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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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Application Information

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IPC IPC(8): G09B9/06
Inventor 任俊生金一丞尹勇任鸿翔张秀凤刘秀文李志华张百安张显库张新宇孙霄峰马烈
Owner DALIAN MARITIME UNIVERSITY
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