蒸汽发生器传热管堵头结构敏感性分析

Sensitivity Analysis of Heat Transfer Tube Plug Structure of Steam Generator

核电厂蒸汽发生器(SG)传热管堵头是维修传热管常用的部件,采用二维轴对称模型弹塑性分析对堵头封堵过程进行模拟,研究拉伸距离、胀块与堵头摩擦系数、堵头内壁斜度与胀块斜度、牙宽、牙高、槽宽以及胀块长共7个参数对封堵过程中拉杆力、胀块接触力以及牙最大接触力的影响,并分别进行了敏感性分析,得出单个参数敏感性变化预测公式,建立了所有敏感性参数对堵头封堵过程的敏感性影响工程估算式。研究结果可为SG传热管堵头结构设计提供参考。

The heat transfer tube plug of steam generator(SG) in nuclear power plant is a common component to maintain the heat transfer tube.Two-dimensional axisymmetric model elastic-plastic analysis was used to simulate the plugging process.The influence and sensitivity analysis of seven parameters(stretching distance,friction coefficient between expander and plug,inclination of plug inner wall and expansion block,tooth width,tooth height,groove width,and expander length) on the tension rod force,expansion block contact force and maximum contact force during plugging process were studied,and the prediction formula for the sensitivity change of each parameter to the plugging process was obtained.The sensitivity effect engineering estimation formula of all sensitivity parameters on the plug plugging process was established.The research results can provide reference for the structural design of SG heat transfer tube plug.