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A structural design method for helicopter blades based on 3D metal printing

A technology for structural design and helicopter, which is applied in the direction of rotorcraft, motor vehicles, and the improvement of process efficiency, which can solve the problems of cumbersome process, high cost, and complex composite blade structure.

Active Publication Date: 2021-05-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Composite material blades have complex structures and are generally manufactured by molding, which is cumbersome and expensive

Method used

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  • A structural design method for helicopter blades based on 3D metal printing
  • A structural design method for helicopter blades based on 3D metal printing
  • A structural design method for helicopter blades based on 3D metal printing

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Such as Figure 1~4 Shown are a variety of lattice structures that have evolved from space cubes, including: figure 1 Array vertex structure lattices in figure 2 The edge-structured lattice in image 3 The triangular prism structure lattice in, Figure 4 The body-centered structure lattice in . The mechanical properties of the lattice structure are analyzed by commercial software: firstly, the Figure 5 The cuboid model composed of various lattice structure arrays shown in the figure should keep the total mass of the model equal; secondly, treat the cuboid test piece as a whole, fix one end, and apply a unit load to the other end. The test data include bending load, pressure load, Torsional load; finally, through finite element analysis, compare its maximum deformation, stress and strain. A comprehensive comparison shows that the triangular prism lattice ...

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Abstract

The invention discloses a structural design of a helicopter blade based on 3D metal printing, which includes: dividing the whole blade into several identical sections, obtaining the airfoil data of the section, and extending the section curve along the span direction to form a skin surface ;According to the requirements of aerodynamic distribution, several lattice points are generated on and within the profile airfoil curve, and the lattice points on the same section are connected through the lattice skeleton to form several triangular lattices; The lattice points form the skeleton of the lattice structure. The skeleton section is assigned a value and the thickness of the skin is assigned to form a section section. Multiple section sections form a half-filled paddle. In the present invention, the lattice structure is filled into the inside of the blade, and works together with the skin, which can well withstand loads such as tension, bending, torsion, etc., so that the design of the blade is simpler and more effective, the weight of the blade is lighter, and industrial batch production is realized, which is effective Advance the integrated design and processing of 3D metal printing helicopter blades.

Description

technical field [0001] The invention relates to a helicopter blade structure design based on 3D metal printing, and belongs to the technical field of 3D printing blade structure design. Background technique [0002] As one of the important components of the helicopter rotor system, the blade starts from a wooden structure or a steel-wood hybrid structure, and gradually develops into a metal girder glued structure, and now a composite material structure is commonly used. Composite material blades have complex structures and are generally manufactured by molding, which is cumbersome and expensive. 3D printing technology breaks through the constraints of traditional blade design, gives helicopter rotor designers a better design space, and manufactures blades with more practical value. It is necessary to develop a new type of paddle structure that can be rapidly prototyped and relatively inexpensive. This patent is sponsored by the Jiangsu Provincial Postgraduate Research and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64C27/473B22F10/28B33Y70/00B33Y10/00B33Y80/00
CPCB64C27/473B33Y10/00B33Y70/00B22F10/00B22F10/28B22F10/20Y02P10/25
Inventor 周丞马佳郭涵涛刘勇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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