核反应堆主系统管道的动力特性研究  

Research on the Dynamic Behaviour of Primary Loop Piping System in Nuclear Reactor

作　　者：赵国桥[1] 郑兆昌[1] 

机构地区：[1]清华大学工程力学系,100084

出　　处：《计算结构力学及其应用》1993年第1期85-91,共7页

摘　　要：本文系统研究了核反应堆主系统管道在局部破裂工况下的动力特性及非线性动力响应。采用统一动力子结构方法建立复杂管系的动力计算模型,采用Lanczos法和Arnoldi法分别求解系统的实、复特征值问题,分析了流速大小对系统固有频率的影响,在给定破口处的流体排放力后,采用Lanczos基矢量与模态综合相结合的自由度减缩技术,兼用伪力法、摄动法等技巧,求解管道系统的非线性动力响应。计算表明,采用本文的理论方法所研制的软件对核安全设计审批具有实用价值。文中给出了主系统管道的若干算例。The dynamic behaviour and nonlinear response of primary loop piping system in nuclear reactor under break-off conditions is studied in this paper. The unified dynamic substructure method is adopted to facilitate the computation. Lanczos algorithm and Arnoldi method are individually used to solve real and complex eigenvalue problems of the piping system considering the flow speed or not. The relationship between the natural frequencies and the flow speed is presented. When the force functions are given in the case of assumed guillotine or longitudinal break,some efficient numerical techniques, include combining Lanczos base and modal synthesis method to reduce the nonlinear DOF, and perturbation,pseduo-force method,are employed for nonlinear response analysis. It is shown that the computer software programmed by the theoritical methods mentioned in this paper is of practical value for the design and evaluation of primary piping system. Some numerical examples are presented in this paper.

关 键 词：管道系统 动力分析 反应堆 

分 类 号：TL353.11[核科学技术—核技术及应用]