Optimization design method for energy-absorbing composite structure with probabilistic uncertainty

被引：0
|
作者：
Feng Z. [1 ]
Su X. [1 ]
Zhao Y. [1 ]
Xie J. [1 ]
Mou H. [1 ]
机构：
[1] Key Lab of Civil Aircraft Airworthiness and Maintenance, CAAC, Tianjin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2019年 / 38卷 / 11期
关键词：
Energy-absorbing characteristics; Optimization design; Programming algorithm; Thin-walled composite energy-absorbing structure; Uncertainty;
D O I：
10.13465/j.cnki.jvs.2019.11.016
中图分类号：
学科分类号：
摘要：
Due to larger dispersity of mechanical performance and lower machining precision of composite materials, thin-walled composite energy-absorbing structures have uncertainties hard to ignore. Here, an optimization design method for thin walled composite energy-absorbing structures with parametric uncertainty was established to identify parametric uncertainty in design stage and design thin walled composite structures with the optimal energy absorption feature. Firstly, parametric ranges were acquired according to using conditions, and the central combined test design was used to determine the test matrix of designed parameters, calculate the mean value and standard deviation of each group of designed parameters' energy absorption characteristic index in the test matrix, and determine response surface equations between different design parametric groups and mean values, standard deviations of their energy absorption indexes, respectively. Finally, the sequence quadratic programming algorithm was adopted to get an optimization solution after substituting response surface equations and design requirements into the optimized mathematical expression. A T700/3234 composite thin-walled circular tube was taken as a study object. Within the specified ranges of feature sizes, under the specified peak load, the maximum ratio energy-absorbing problem and the ratio energy-absorbing's minimum standard deviation problem were solved, respectively to verify the applicability of the proposed method. © 2019, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：101 / 109and139
相关论文
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