复合材料双钉胶螺混合连接接头多参数优化设计

Multi-parameter Optimal Design of Composite Double-bolt Hybrid Bolted/bonded Joints

为提高复合材料双钉胶螺混合连接接头的承载能力,本文结合实验和有限元方法,利用ABAQUS建立了有限元模型并验证了其可行性,基于代理模型和遗传算法,对碳纤维复合材料板与钛合金板双钉混合连接结构的板宽、端距和孔距等参数开展了多参数优化设计。结果表明:二次多项式代理模型的预测结果精度最高;与优化前试验得到的常规混合连接接头的载荷性能相比,优化后的结构承载能力提升了44.35%。

In order to improve the load-bearing capacity of the composite double-bolt hybrid bolted/bonded joints,model was built on ABAQUS and the feasibility was verified based on experiments and finite element methods.Then,the accuracy of proxy model was studied,and a multi-parameter optimization design was carried out on the plate width,end distance and hole distance of hybrid joints based on genetic algorithm.The results show that the quadratic polynomial surrogate model has the highest accuracy.Compared with the load performance of the conventional double-bolt hybrid bolted/bonded joints obtained in the test,the load-bearing capacity of the structure after parameter optimization has been increased by 44.35%.