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Hingeless rotor blade model and layer pavement design method thereof

A technology of rotor blades and design methods, applied in computing, special data processing applications, instruments, etc., to achieve the effect of improving aeroelastic stability

Inactive Publication Date: 2014-07-16
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of aeroelastic stability in the present composite material hingeless helicopter rotor system, the present invention proposes a hingeless helicopter composite rotor blade model and its layer design method

Method used

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  • Hingeless rotor blade model and layer pavement design method thereof
  • Hingeless rotor blade model and layer pavement design method thereof
  • Hingeless rotor blade model and layer pavement design method thereof

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Embodiment

[0036] The proposed method is used to study the composite rotor blade layup method, and the structure and aerodynamic parameters of a certain type of helicopter rotor system are selected, specifically the number of blades is 4, the radius of the blade is 5m, and the chord length of the blade is 0.08m. Speed ​​40s -1 . In order to simplify the calculation, an angle between the horizontal flexible beam and the vertical flexible beam is selected as the design parameter here. The angle A in the initial design is 90°, and the influence of the number of composite material layers is not considered.

[0037] Table 1 Lamination design scheme of flexible beams

[0038]

[0039] The layup design scheme is expressed as 3 layers of composite material with layup angle A, then 3 layers of 15° and -15° double-layer structure, and finally 2 layers of 0° layup. The value range of A is between 0° and 90°. By calculation, it can be obtained as image 3 The functional relationship sh...

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Abstract

The invention discloses a hingeless rotor blade model and a layer pavement design method thereof. The hingeless rotor blade model comprises a paddle hub, a vertical flexible beam, a horizontal flexible beam, a main paddle blade and a distance-variable hinge. According to the layer pavement design method, the number of composite material layers and layer pavement angles of the composite material layers are adopted as design variables. The layer pavement design method comprises the following steps: firstly, determining a design space, then analyzing the aeroelastic stability on every design situation in the design space so as to obtain functions of real parts of characteristic indexes of the aeroelastic stability of the paddle blade which are relative to design points, and solving the functions to obtain an optimal design scheme of the aeroelastic stability. The aeroelastic stability can be enhanced with the adoption of the layer pavement design method of a composite material rotor blade.

Description

technical field [0001] The invention belongs to the field of helicopter structure design, and in particular relates to a hingeless helicopter composite material rotor blade aeroelastic stability model and a layup design method thereof, which can be applied to composite material hingeless helicopter rotor blade aeroelastic stability design . Background technique [0002] The rotor is one of the most important components of the helicopter system, consisting of structures such as the hub and blades. It is mainly used to generate lift and operating force, etc., which determine the flight performance, flight quality and vibration level of the helicopter. The motion of the rotor blade is extremely complex, in addition to the rotation around the hub itself, there are also flapping, shimmy and pitch changing motions. In order to realize three kinds of movements, horizontal hinges, vertical hinges and pitch-variable hinges are all set on the propeller hubs of the initial articulate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 向锦武任毅如罗漳平郭俊贤张亚军黄明其
Owner BEIHANG UNIV
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