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Ice region ship propeller blade optimization method for improving ice load resistance

A load capacity and optimization method technology, applied in the direction of rotating propellers, design optimization/simulation, ship construction, etc., can solve the problems that have not yet been formed and the methods of anti-ice load capacity of propellers in ice regions are less studied, so as to avoid redundant design The effect of surplus and low investment

Pending Publication Date: 2021-06-01
CHINA SHIP DEV & DESIGN CENT
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  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current relevant research literature, the research on the anti-ice load of the propeller in the ice area is mainly to check the strength and has not yet formed a complete specification standard, and there are few studies on the method of improving the anti-ice load capacity of the propeller in the ice area through the optimal design of the blade.

Method used

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  • Ice region ship propeller blade optimization method for improving ice load resistance
  • Ice region ship propeller blade optimization method for improving ice load resistance
  • Ice region ship propeller blade optimization method for improving ice load resistance

Examples

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Embodiment Construction

[0058] The specific implementation of the present invention will be described below by taking the strength optimization of an adjustable propeller blade of a PC6-class ship navigating in ice regions as an example.

[0059] Firstly, according to the propeller design parameters, the four working conditions of finite element analysis are obtained as shown in Table 1 below.

[0060] Table 1 Propeller blade load conditions

[0061] Condition Condition 1 Condition 2 Condition 3 Condition 4 Force (KN) 703.4 351.7 459.4 229.7

[0062] The geometric model of the propeller blade is established, and the finite element mesh is divided. Such as figure 1 As shown, hexahedral mesh is used in most areas of finite element mesh division, and tetrahedral mesh is used in leaf tip part to ensure calculation accuracy and mesh quality.

[0063] Carry out the loading of the 4 working conditions respectively, and set the corresponding boundary conditions, see Figure...

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Abstract

The invention discloses an ice region ship propeller blade optimization method for improving ice load resistance. The method is characterized in that the size and range of an ice load on a propeller are simulated through a finite element method, the stress distribution condition is calculated, the ultimate strength and fatigue strength analysis is carried out, the blade design scheme is iteratively corrected, and the ice load resistance of blades is improved on the premise of avoiding design redundancy and ensuring the hydrodynamic performance of the propeller. Compared with the prior art, the method has the advantages of short development period, controllable technical risk under manpower and material resource investment, and important help for improving the design quality and navigation safety of a ship in an ice region.

Description

technical field [0001] The invention relates to ship propulsion technology, in particular to a design method for optimizing propeller blades so as to improve the anti-icing load capacity of ship propeller blades in ice regions. Background technique [0002] When the propeller is working, the hydrodynamic force acting on the blade has axial thrust and resistance opposite to the steering, both of which cause the blade to bend and twist. When the propeller rotates, the quality of the blade itself produces a radial centrifugal force, which makes the blade stretched. If the blade is tilted or pitched, the centrifugal force will also make the blade bend; while the ship is navigating in ice or breaking ice During the process, the propeller blades will also be subjected to the force of the ice load. The impact of the ice cubes on the blades may also cause the propellers of the icebreaker to twist, crack or even break the propeller shaft. It can be seen that the loads borne by prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B71/10G06F30/15G06F30/23B63H1/26
CPCB63B71/10G06F30/15G06F30/23B63H1/26
Inventor 傅江妍陈曦贺懿丽朱江波赵阳
Owner CHINA SHIP DEV & DESIGN CENT