Random normal distribution based composite laminate stacking layer optimization method

A composite material layer and normal distribution technology, applied in design optimization/simulation, computer-aided design, special data processing applications, etc., can solve problems such as large amount of calculation and slow convergence, achieve high confidence, rapid convergence, and reduce Effect of Structural Weight Ratio

Inactive Publication Date: 2016-03-16
CHINA HELICOPTER RES & DEV INST
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[0003] The present invention provides a composite material laminate layer optimization method based on random normal distributi

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  • Random normal distribution based composite laminate stacking layer optimization method
  • Random normal distribution based composite laminate stacking layer optimization method
  • Random normal distribution based composite laminate stacking layer optimization method

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[0014] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below ...

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Abstract

The invention discloses a random normal distribution based composite laminate stacking layer optimization method, and relates to the technical field of machinery. The random normal distribution based composite laminate stacking layer optimization method comprises the following steps of: step 1: according to a ratio requirement of each stacking layer angle, determining a basic stacking layer sequence; step 2: performing digital coding on each stacking layer sequence, and then performing random transformation and decoding on the basic stacking layer sequence by adopting a normal distribution function to obtain a new stacking layer sequence in a next round of iteration; step 3: according to a target function formula defined in the specification, determining an optimal solution of the basic stacking layer sequence; and step 4: comparing optimal solutions of basic stacking layer sequences, and selecting a maximum value as an optimal stacking layer. The method has the beneficial effects that the basic stacking layer sequence is reconstructed by utilizing the random normal distribution function, an optimal axial compression bearing capacity of a flange of a composite laminate can be obtained, a structural weight ratio is reduced, the confidence degree is high, and the convergence is quick.

Description

technical field [0001] The invention relates to the technical field of design machinery, and specifically relates to a method for optimizing the layering of composite material laminates based on random normal distribution. Background technique [0002] As the basic structural form of a helicopter, composite laminates can increase their load-bearing capacity through proper lay-up design. Composite flange structures can be treated as long laminates with one long side free and the other simply supported. In practical applications, regarding the selection of laminate layup methods, various factors such as layup angle, layup ratio, and layup sequence should be considered. From the perspective of the limitation of process conditions and the simplification of design, the laying angle is usually selected within the range of π / 4 angle. Therefore, the design variable of the layup optimization design of composite laminates is the layup sequence, which belongs to the optimization prob...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20G06F2113/24
Inventor 吕乐丰吴文科吴远飞张桥
Owner CHINA HELICOPTER RES & DEV INST
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