控制棒驱动机构动态提升特性研究

基于控制棒驱动机构的磁路和电路方程以及对控制棒驱动机构动态提升过程分析,分别推导出系统静态过程和动态过程的磁路-电路-机械运动耦合方程.采用解析解的方法求解提升起始电流和提升起始时间.采用ASME规范推荐的动态分析的数值仿真方法模拟控制棒驱动机构动态提升过程,分析磁极和衔铁间不同设计间隙下系统的提升特性.结果表明,衔铁起始提升时间随着设计间隙增大而增大,且设计间隙越大,提升所需时间越长;提升速度随着时间的增加而增大,且随着时间的增加,提升加速度增大,设计间隙越小,提升结束时的冲击加速度越大.

Study on Dynamic Lifting Characteristics of Control Rod Drive Mechanism

Based on the equations of the electric circuit and the magnetic circuit and analysis of the dynamic lifting process for the control rod drive mechanism(CRDM),coupled magnetic-electric-mechanical equations both for the static status and the dynamic status are derived.The analytical method is utilized to obtain the current and the time when the lift starts.The numerical simulation method of dynamic analysis recommended by ASME Code is utilized to simulate the dynamic lifting process of CRDM,and the dynamic features of the system with different design gaps are studied.Conclusions are drawn as:(1) the lifting-start time increases with the design gap,and the time for the lifting process is longer with larger gaps;(2) the lifting velocity increases with time;(3) the lifting acceleration increases with time,and with smaller gaps,the impact acceleration is larger.