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A propeller static strength calculation method

A calculation method and technology for propellers, applied in the direction of calculation, computer-aided design, design optimization/simulation, etc., can solve problems such as insufficient interface stability, unfavorable propeller design, complex modeling, meshing process, etc., to improve design efficiency , the effect of high calculation efficiency and simple implementation program

Inactive Publication Date: 2019-01-08
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

Although this method can accurately predict the stress distribution of propeller blades, it requires complex modeling and meshing processes, which is not conducive to the design of propellers, and there is a problem of insufficient interface stability when connecting boundary element programs with finite element software

Method used

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  • A propeller static strength calculation method
  • A propeller static strength calculation method
  • A propeller static strength calculation method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] A propeller static strength calculation method adopts the combination of surface element method and finite element method to calculate the propeller static strength, which has the advantages of high efficiency and accurate calculation results. First, the propeller to be calculated is divided into panel meshes and unit meshes of the solid structure, and the overall stiffness matrix and equivalent nodal force are formed after meshing, and then the surface element method is used to calculate the surface pressure distribution and hydrodynamic performance of the propeller , using the finite element method to calculate the propeller stress and displacement, so that the deformed propeller model can be obtained. Finally, iterative calculation is carried out, and the final propeller static strength calculation result is calculated by judging whether the maximum displacem...

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Abstract

The invention belongs to the field of propeller static strength calculation, in particular to a propeller static strength calculation method. The combination of panel method and finite element methodfor static strength calculation of propeller has the advantages of high efficiency and accurate calculation results. Firstly, the panel mesh and the element mesh of the solid structure of the propeller need to be calculated are divided. After meshing, the total stiffness matrix and equivalent nodal force are formed. Then the surface pressure distribution and hydrodynamic performance of the propeller are calculated by panel method, and the stress and displacement of the propeller are calculated by finite element method, so the deformed propeller model can be obtained. Finally, the final staticstrength of the propeller is calculated by iterative calculation and judging whether the maximum displacement is convergent or not. The method can realize the static strength calculation of the propeller, improve the shortcomings of the existing calculation method such as complex mesh division, long calculation time and the like, and provide a reference for the design of the propeller.

Description

technical field [0001] The invention belongs to the field of propeller static strength calculation, and in particular relates to a propeller static strength calculation method. Background technique [0002] The propeller, as the power source in the process of sailing, has always been an important focus of ship design. The reliability of the propeller structure is a prerequisite to ensure that the ship's navigation performance meets the requirements, so it is of great significance to navigation safety. However, with the development of large-scale and high-speed ships, the application of high-power main engines leads to an increase in the surface load of propeller blades, and the wide application of large-skew propellers makes the strength of propellers more prominent. When the propeller is working, the thrust and rotational resistance generated by it will bend and twist the blade, and the centrifugal force generated by the rotation of the propeller will also cause the blade ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06Y02T90/00
Inventor 王超韩康李鹏翁凯强马开放胡笑寒汤佳敏郭欣雨
Owner HARBIN ENG UNIV
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