考虑材料烧蚀的整流罩结构热稳定性优化设计  

Thermal stability optimization design of fairing structure considering material ablation

作　　者：王志 岳振江 尹莲花 陈友伟 刘莉[1,2] Wang Zhi;Yue Zhenjiang;Yin Lianhua;Chen Youwei;Liu Li(School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China;Laboratory of Dynamics and Control of Flight Vehicle,Ministry of Education,Beijing 100081,China;Beijing Institute of Astronautical Systems Engineering,Beijing 100076,China)

机构地区：[1]北京理工大学宇航学院,北京100081 [2]飞行器动力学与控制教育部重点实验室,北京100081 [3]北京宇航系统工程研究所,北京100076

出　　处：《战术导弹技术》2023年第3期51-58,共8页Tactical Missile Technology

摘　　要：为提高整流罩设计过程中烧蚀热响应预测及热应力对临界承载能力影响的准确性,提出了一种考虑材料烧蚀的整流罩结构热稳定性优化设计流程。考虑整流罩防护层热传导、热解吸热、热解气体流动及烧蚀后退,结构层热传导,建立热响应分析模型;应用一阶剪应变理论建立热屈曲平衡方程得到锥壳热稳定性分析模型。对整流罩前锥段进行优化设计,获得了前锥段结构设计参数,减轻了前锥段结构质量。算例结果表明,所提方法可通过精细化分析有效缩减设计冗余,对整流罩结构设计具有指导意义。In order to improve the accuracy of the ablation thermal response prediction and the influence of thermal stress on the critical bearing capacity in the design process of the fairing,an optimal design process for thermal stability of fairing structure considering material ablation is proposed.Considering the thermal conduction,thermal desorption heat absorption,pyrolysis gas flow and ablation retreat of the fairing protective layer,the thermal response analysis model of the structural layer is established.The thermal buckling equilibrium equation is established by applying the first-order shear strain theory to obtain the thermal stability analysis model of the conical shell.The optimized design of the front cone section of the fairing is carried out,and the structural design parameters of the front cone section are obtained,which reduces the structural quality of the front cone section.The calculation example results show that the method proposed can effectively reduce the design redundancy through refined analysis,which has guiding significance for designing fairing structure.

关 键 词：整流罩 烧蚀 热响应 热应力 优化设计 稳定性 热解 

分 类 号：V421.1[航空宇航科学与技术—飞行器设计]