某大型固体发动机T800碳纤维壳体封头结构仿真分析和优化设计  

Simulation analysis and optimization design of domestic T800 carbon fiber composite case dome of a large⁃scale SRM

作　　者：喻琳峰 任全彬[2] 张爱华 宋学宇 YU Linfeng;REN Quanbin;ZHANG Aihua;SONG Xueyu(Xi'an Institute of Aerospace Propulsion Technology,Xi’an710025,China;Aerospace Solid Propulsion Technology Institute,Xi’an710025,China)

机构地区：[1]西安航天动力技术研究所,西安710025 [2]航天动力技术研究院,西安710025

出　　处：《固体火箭技术》2023年第4期611-620,共10页Journal of Solid Rocket Technology

摘　　要：针对15 MPa内压载荷下某碳纤维复合材料壳体结构优化设计问题,采用代理模型辅助优化算法得到最大沿纤维方向的应变最小的后封头补强模型。基于Python对ABAQUS进行二次开发构建精细化的碳纤维壳体后封头模型并进行仿真分析,预测其破坏位置并得到优化目标参数。以碳纤维缠绕层带宽、纵向缠绕层退移距离和补强位置为优化变量,最大沿纤维方向应变为优化目标,利用LHS(拉丁超立方采样)方法建立关于优化变量的参数化组合样本,结合神经网络代理模型和遗传算法对国产T800碳纤维缠绕壳体后封头最大沿纤维方向应变进行寻优求解。结果表明,在纵向缠绕层退移半径为19.98 mm、带宽为25.96 mm、补强层起始半径为579.38 mm时,最大沿纤维方向应变可以达到最小的0.0158,相比未优化设计结构下降了4.2%,为今后的大型国产碳纤维缠绕壳体封头设计提供了设计方法参考。For the structure optimization design of a carbon fiber composite case dome under internal pressure load with 15 MP a,the reinforcement model of aft dome with minimum strain in the maximum fiber direction was obtained by means of the agent mod⁃el⁃assisted optimization algorithm.By using Python to conduct secondary development of ABAQUS,a refined carbon fiber case aft dome model was constructed and simulated,and the failure position was predicted and the optimized target parameters were obtained.For the domestic carbon fiber case aft dome,the bandwidth,the backward distance of the longitudinal winding layer and the rein⁃forcement position were taken as the optimization variables,and the maximum fiber direction strain was taken as the optimization ob⁃jective.LHS(Latin hyper cubic sampling)method was used to establish the optimization variables to parameterize the combined sam⁃ples.The model of case aft dome was optimized by using neural network agent model and genetic algorithm.The results show that when the longitudinal fiber displacement is 19.98 mm,the winding layer bandwidth is 25.96 mm,and the initial radius of reinforce⁃ment layer is 579.38 mm,the maximum fiber tangential strain reaches the minimum 0.0158,which is 4.2%lower than that of the structure without optimization.It provides a reference for the design of large size dome in the future.

关 键 词：碳纤维壳体 封头补强 仿真分析 纤维应变 神经网络代理模型 遗传算法 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]