Angle optimization analysis of variable stiffness laminates based on ant colony algorithm

doi:10.19936/j.cnki.2096-8000.20230128.001

Abstract

Abstract: In order to perform stiffness analysis of variable stiffness composite laminates, a discrete unitisation of the laminate vibration equation was carried out based on the differential quadrature method (DQM) in this study, which can facilitate frequency analysis. Meanwhile, the fundamental frequency is an essential research parameter of vibration. The ant colony algorithm (ACA) is used in conjunction with DQM to generate the initial angle randomly by the ACA to improve the frequency values calculated by DQM in the evolutionary iteration process. The results show that the evolutionary iteration process of ACA can optimize the selection of the beginning and termination angles of the pavement very well. Through updating the pheromone generation by generation and improving the ACA appropriately to achieve the final angle convergence, the optimal pavement start and end angles are found to be [<38°|62.75°>,<90°|72°>,<0°|5°>,<0°|5°>]_S. Moreover, the corresponding frequency value is 11.712 57 Hz. Also, the data statistics show that the initial angles are mainly concentrated around 0°, 38°and 90°, and the termination angles are loosely distributed but mainly concentrated around 10°~90°.

Key words: ant colony algorithm, differential quadrature method, variable stiffness, frequency, angle distribution, composites

CLC Number:

TB332

ZHANG Guiming, SHEN Zhiqiang, ZU Lei, WANG Huabi, ZHANG Qian, XIA Xianzhao, GENG Hongbo, PAN Jie, ZOU Liqing. Angle optimization analysis of variable stiffness laminates based on ant colony algorithm[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(1): 5-15.

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