复合材料连接结构的钉载均匀化快速寻优方法
收稿日期: 2024-03-04
修回日期: 2024-03-21
录用日期: 2024-04-07
网络出版日期: 2024-04-19
基金资助
国家自然科学基金(12172077)
Fast optimization method for nail load homogenization of composite joint structures
Received date: 2024-03-04
Revised date: 2024-03-21
Accepted date: 2024-04-07
Online published: 2024-04-19
Supported by
National Natural Science Foundation of China(12172077)
提出了一种基于最优曲线概念的钉孔间隙参数优化方法，该方法可以实现对任意双搭接复合材料连接结构钉载均匀化的快速寻优。本文针对钉孔间隙，将最优拉丁超立方算法和NLPQL算法相结合，采用组合优化策略，实现了连接结构螺栓的均匀承载。之后基于最优钉孔间隙的分布，提出最优曲线概念。并基于最优曲线，实现了对双搭接复合材料连接结构钉载均匀化的快速寻优。然后，分别针对拧紧力矩、螺栓个数、结构参数对最优曲线的影响，设计了多种连接结构，通过数值仿真，对最优曲线的适用性进行研究。研究表明利用最优曲线均可以将连接结构螺栓载荷最大程度均匀分布，对于六排螺栓连接结构可将承载能力提升达15%以上。
李伟 , 宋鑫 , 林湘齐 , 苏智琳 , 王成波 , 李桐 . 复合材料连接结构的钉载均匀化快速寻优方法[J]. 航空学报, 2024 , 45(23) : 230345 -230345 . DOI: 10.7527/S1000-6893.2024.30345
A parameter optimization method for bolt-hole clearance based on the concept of optimal curve is proposed to achieve a fast optimization search for the uniformity of nail load of any double-lap composite joint structure. The optimal Latin hypercube algorithm and NLPQL algorithm are combined for the bolt-hole clearance， and a combined optimization strategy is used to achieve the uniformity of the bolt load of the composite joints. We further propose the concept of optimal curve based on the distribution of the optimal bolt-hole clearance， according to which a fast optimization search is conducted to achieve uniformity of the nail load in the double-lap composite joint structure. Then， various joint structures are designed to study the effects of fastening torque， number of bolts and structural parameters on the optimal curve， and the applicability of the optimal curve is verified by numerical simulation. The study shows that the optimal curve can be utilized to maximize the uniform distribution of bolt load in the composite joints. For the six-row bolt composite joints， the load-carrying capacity can be increased by over 15%.
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