瑞利法在耦合系统振动固有频率计算中的应用  

Applications of the Rayleigh Method in Computing Vibratory Natural Frequencies of Coupled Systems

作　　者：廖剑晖[1] 贺寅彪[1] 

机构地区：[1]上海核工程研究设计院,上海200233

出　　处：《机械工程师》2014年第7期22-24,共3页Mechanical Engineer

基　　金：国家重大科技专项(2010ZX06002)

摘　　要：以由堆芯吊篮和反应堆压力容器组成的耦合振动系统的扭转振动问题为例,介绍瑞利法求解耦合振动系统固有频率的基本步骤,并利用瑞利法求解该系统的一阶固有频率;通过与精确解的比较,说明瑞利法求解结果的基本性质,分析假设振型对该结果的影响,说明瑞利法可作为初步分析方法,用于核电设备耦合振动系统固有频率的估算。For studying the torsional vibration of a coupled system composed of a core barrel and a reactor pressure vessel, the basic procedures of the Rayleigh method are presented for computing natural frequencies of templed systems. The first-order natural frequeney is calculated for such a core barrel-reactor pressure vessel system. Compared with the accurate solution, the basic attributes of resuhs from the Rayleigh method are illustrated. Effects of the postulated modes on the computational results are evaluated. As a preliminary estimation approach, tile Rayleigh method is applicable for calculating natural frequencies of nuclear power coupled vibration systems.

关 键 词：瑞利法 耦合振动系统 固有频率 扭转振动 假设振型 

分 类 号：TL35[核科学技术—核技术及应用]