上海航天（中英文）2026，Vol.43Issue(3)：182-191,209,11.DOI:10.19328/j.cnki.2096-8655.2026.03.017
PBO/BMI复合材料的霍尔推力器支架轻量化设计与力学性能研究
Lightweight Design and Mechanical Performance of Hall Thruster Brackets Based on PBO/BMI Composites
摘要
Abstract
To enhance the lightweight performance and mechanical properties of Hall thruster brackets and overcome the limitations of conventional metallic materials in terms of specific stiffness,thermal conductivity,and weight reduction,the mechanical properties of poly(p-phenylene benzobisoxazole)fiber-reinforced bismaleimide resin(PBO/BMI)composites are systematically investigated,and the failure mechanisms are analyzed.Based on this material,the lay-up optimization and finite element simulations are conducted for the thruster bracket design.The bracket specimens are fabricated via compression molding,and their dynamic performance is validated through modal testing.The results indicate that the modified composites exhibited a 40.6% increase in the through-thickness compressive strength and a 30.4%improvement in the interlaminar shear strength,with superior tensile strength retention at elevated and low temperatures compared with unmodified materials.The measured mass of the Hall thruster bracket is only 0.62 kg,representing a 61.3%reduction relative to the design limit.The first natural frequencies of the assembly are in the range of 49.9 Hz to 123.0 Hz,satisfying the≥40 Hz design requirement,and the discrepancies between the simulation and experimental results are less than 3%.These findings demonstrate the feasibility of applying modified PBO/BMI composites in the lightweight structural design of electric propulsion components.关键词
霍尔推力器支架/聚对苯撑苯并二噁唑(PBO)纤维/纤维复合材料/轻量化设计/模态分析Key words
hall thruster bracket/poly(p-phenylene benzobisoxazole)(PBO)fiber/fiber composite material/lightweight design/modal analysis分类
通用工业技术引用本文复制引用
史汉夫,陈筠力,奚镓倩,王占一,焦琨,张锦..PBO/BMI复合材料的霍尔推力器支架轻量化设计与力学性能研究[J].上海航天（中英文）,2026,43(3):182-191,209,11.基金项目
中国航天科技集团有限公司第八研究院产学研合作基金资助项目(SAST2025-031) （SAST2025-031）
国家自然科学基金资助项目(52403345) （52403345）
