某大型风洞喷管动力学特性分析  

Dynamic Characteristic Analysis of Nozzle for a Large Wind Tunnel

作　　者：申江[1,2] 邵忍平[1] 李晶[1] 

机构地区：[1]西北工业大学机电学院,西安710072 [2]中国空气动力研究与发展中心,绵阳621000

出　　处：《机械科学与技术》2014年第4期469-473,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51275422);"十一五"国家批准建设的大型航空基础设施项目资助

摘　　要：基于有限元技术,运用大型有限元软件MSC.NASTRAN,进行了三维建模设计。采用模态和瞬态响应分析法对喷管的动力特性进行了分析计算,得到了喷管在工作过程之中的的动态响应与动力特性(固有频率及振型),并与风洞激振频率实验进行了对比验证。结果表明:该喷管模态频率分布良好,动态特性较好,避开了主要激振频率,使喷管能有效避免产生共振。Based on the finite element technology, using the finite element software MSC. NASTRAN, the three- dimensional model of a large wind tunnel nozzle is established and the dynamic characteristics were explored. The modal analysis and transient responses were analyzed to obtain the dynamic response and dynamic characteristics （natural frequency and vibration modal） , and then the analysis results are compared and verified by wind tunnel vibration frequency experiments. The results show that the nozzle modal frequency distribution and dynamic charac- teristics are better, avoiding the main wind tunnel vibration frequency.

关 键 词：风洞 喷管 三维建模 动态响应 动力特性 

分 类 号：V211.74[航空宇航科学与技术—航空宇航推进理论与工程]