大直径整流罩运载火箭选型抖振试验研究  

Study on buffeting test of large diameter fairing launch vehicles selection

作　　者：王国辉[1] 闫指江 季辰[3] 唐伟 魏远明 WANG Guohui;YAN Zhijiang;JI Chen;TANG Wei;WEI Yuanming(China Academy of Launch Vehicle Technology,Beijing 100076,China;Beijing Institute of Astronautical System Engineering,Beijing 100076,China;China Academy of Aerospace Aerodynamics,Beijing 100074,China)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]北京宇航系统工程研究所,北京100076 [3]中国航天空气动力技术研究院,北京100074

出　　处：《北京航空航天大学学报》2023年第12期3230-3236,共7页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金(11872128)。

摘　　要：运载火箭在研制初期会根据卫星的包络需求提出整流罩的包络尺寸,进而提出火箭的初步构型设计。为了预示火箭设计构型的抖振风险,需针对火箭具体的外形尺寸、箭体频率、刚度数据开展跨声速抖振试验研究的相关工作。采用全弹性模型的抖振试验技术,以某型火箭3种5 m级直径整流罩构型为研究目标,通过开展2个方向的抖振试验,采用特征系统实现算法,评估3种火箭构型的抖振风险。研究结果表明:5.2 m直径整流罩+3.35 m直径三级构型一阶弹性模型对来流的响应时间短、响应幅值低,一阶和二阶弹性模型的气动阻尼值均大于零,可作为中国未来中型运载火箭大直径整流罩构型的外形设计方案。The envelope size of the fairing will be recommended during the first stage of launch vehicle design in accordance with the satellite’s envelope size requirements,which also affects the launch vehicle’s basic configuration design.To predict the buffeting risk of this configuration,the aerodynamics design team will carry out transonic aerodynamic buffeting test research in the aspect of the specific launch vehicle configuration size,frequency,and stiffness data.In this paper,the buffeting test technology of the full elastic model is adopted,and the research goal is to carry out the buffeting test in two directions for three configurations of 5 m diameter fairing of a certain rocket.The buffeting risk of the three configurations is evaluated by using the eigen system realization algorithm.The research findings indicate that the first-order elastic model of the 5.2 m diameter faring+3.35 m diameter three-stage configuration has a quick response to incoming flow and a small response amplitude,and that the aerodynamic damping values of the first and second free-free bending modes are both positive.As a result,it can be used as the shape design solution for the large-diameter fairing of the medium-sized launch vehicle in our country.

关 键 词：整流罩 运载火箭 跨声速 抖振 特征系统实现算法 全弹性模型 风洞试验 

分 类 号：V434.14[航空宇航科学与技术—航空宇航推进理论与工程]