有限元分析在大推力火箭动力系统试验台承力架结构优化中的应用  

Application of FEA in structure optimization of load-bearing frame of propulsion system test-bed for large-thrust rockets

作　　者：孔凡超[1] 沈冰妹[1] 胡旭坤[1] 

机构地区：[1]北京航天试验技术研究所,北京100074

出　　处：《火箭推进》2011年第5期41-46,共6页Journal of Rocket Propulsion

基　　金：中国航天科技集团公司支撑项目

摘　　要：采用通用有限元软件ANSYS建立了某火箭动力系统试验台承力架有限元模型,分析了该承力架在试验状态和试验准备状态下的应力分布,根据应力分析结果对承力梁的结构和布局作了相应优化,使结构强度满足工作要求。同时对局部结构——承力环支腿进行了应力分析和优化。最后分析了承力架的自身模态,其轴向一阶振型在试验件轴向一阶振型范围内,需进一步采取措施以避免共振。The FEA software ANSYS is used in this study to construct the finite element model of the load-bearing frame of a certain propulsion system test-bed,and analyze the stess distribution of the load-bearing frame under the test and ready-tested status.The structure and layout of the loadbearing beam are optimized according to the results of stress analysis to make the strength of the model meet the working requirements.The stress analysis and optimization are also made on the legs of the load-bearing ring,part of the frame.The mode of the frame is studied at last.Its axial first-order mode is within the range of the axial first-order mode of UUT,so further measures should be taken to avoid resonance.

关 键 词：有限元分析 承力架 动力系统试验 

分 类 号：V434-34[航空宇航科学与技术—航空宇航推进理论与工程]