复合载荷作用下火箭输送管动力特性试验与数值研究  

Tests and numerical simulation for dynamic characteristics of rocket transmission pipes under combined environmental loads

作　　者：韩文龙[1] 张明明[1] 卫国[1] 胡彦平[1] 王帅[1] HAN Wenlong;ZHANG Mingming;WEI Guo;HU Yanping;WANG Shuai(Beijing Institute of Strength ＆ Environment Engineering,Beijing 100076,China)

机构地区：[1]北京强度环境研究所环境可靠性中心,北京100076

出　　处：《振动与冲击》2018年第11期1-4,11,共5页Journal of Vibration and Shock

摘　　要：新型运载火箭多采用低温推进剂,增压输送系统作为火箭动力源头,其稳定性至关重要,因此新型增压输送管路的动力特性研究尤为关键。根据输送管路在箭上的实际安装状态,设计了大尺寸输送管路综合应力试验系统,此系统除传统的振动、控制系统之外,还包括低温液体加载系统、压力加载平衡系统、管路极限位移补偿系统、管路变形失稳防护系统。借助以上试验系统分析了管路结构在常温常压、充压、液氮充压状态下的管路结构的固有特性。依据试验分析结果建立并修正了管路有限元模型,结合试验对管路在箭上所经受的复合环境应力进行了仿真和试验研究,并对管路各部位动响应结果进行了分析。研究结果对不同类型的空间管路设计有着很强的指导意义。According to the actual installation state of a pipeline of a rocket,a rocket transmission pipe test system under combined environment loads was designed and constructed. This system contained a vibration control system,a low temperature liquid loading one,a pressure loading balance one,a pipeline limited displacement compensating one and a pipeline deformation instability protection one. Using the test system,natural frequencies of a pipeline structure under conditions of normal temperature and normal pressure,charging and liquid nitrogen charging were analyzed,respectively.Based on the test results,the finite element model of the pipeline was established and modified. Numerical simulation and tests for dynamic responses of the pipeline under comprehensive environment stresses of a rocket were conducted. The results were analyzed. They provided a strong guide for the design of different types of space pipelines.

关 键 词：输送管路 复合载荷试验系统 有限元模型 结构动力特性 

分 类 号：TJ7[兵器科学与技术—武器系统与运用工程]