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针对某空间科学探测器采用木星借力方式进入太阳极轨,若采用CZ-5运载火箭与上面级组合发射,探测器允许质量无法满足有效载荷需求的情况,为确保探测器质量可达1 350kg,创新提出大承载高燃重比薄壁贮箱一体化结构设计。先确定贮箱构型为6只球形贮箱焊接形成六边形整体。再通过分析承力杆内倾角、数量、是否贯穿贮箱内部等因素对承力效果的影响,确定承力杆最佳构型为正八边形构型,承力杆内倾25°,电子仪器贮箱各自与2根承力杆连接,内部贯穿;推进剂贮箱对应的承力杆不贯穿,变为贮箱上下两端的接头。既有贮箱组合承力,又有杆件集中承力。对整器的模态分析和一体化球形贮箱的静力分析表明均满足结构强度要求。燃重比从传统推进结构的12.5提高至20.7,增幅为65.6%,满足木星、太阳等深空探测任务变轨携带大量推进剂的需求。
For a space science detector using Jupiter leveraging approach into the polar orbit, if using CZ-5 launch vehicle combined with the above-level launch, the detector allows the quality of the payload can not meet the needs of the situation, in order to ensure the quality of the detector up to 1 350kg , Innovation proposed large load-bearing high-density thin-walled tank integrated structural design. First determine the tank configuration for the six spherical tank welded to form a hexagonal whole. Then by analyzing the influence of the bearing angle, the number and whether it penetrates the inside of the tank on the bearing effect, the optimal configuration of the bearing rod is determined to be a regular octagonal configuration, the inclination of the bearing rod is 25 °, Each of the boxes is connected with two load-bearing rods and runs through the inside. The corresponding supporting rods of the propellant tanks do not penetrate and become the joints at the upper and lower ends of the tank. Both the combination of tank bearing capacity, but also focus on the strength of the rod. The modal analysis of the integrator and the static analysis of the integrated spherical tank indicate that all satisfy the structural strength requirements. Fuel-to-heavy ratio increased from 12.5 to 20.7, an increase of 65.6% from the traditional propulsion structure to meet the demand of carrying a large amount of propellant through the orbit of deep space exploration missions such as Jupiter and the Sun.