Finite element analysis of the flange sealing structure in the reactor system

LI Yuan HE Yinbiao LIAO Jianhui HUANG Qing SHEN Rui

doi:10.11889/j.0253-3219.2013.hjs.36.040648

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Finite element analysis of the flange sealing structure in the reactor system

更新时间：2021-06-03

- Finite element analysis of the flange sealing structure in the reactor system
- NUCLEAR TECHNIQUES Vol. 36, Issue 4, Article number: 040648(2013)
- 作者机构：
  
  上海核工程研究设计院工程设备所
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2013.hjs.36.040648
  CLC： TM623
- Published：2013
- 稿件说明：
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[1]李源,贺寅彪,廖剑晖,黄庆,沈睿.核级承压设备密封结构的有限元分析[J].核技术,2013,36(04):251-255.

LI Yuan HE Yinbiao LIAO Jianhui HUANG Qing SHEN Rui. Finite element analysis of the flange sealing structure in the reactor system[J]. Nuclear techniques, 2013, 36(4): 040648
[1]李源,贺寅彪,廖剑晖,黄庆,沈睿.核级承压设备密封结构的有限元分析[J].核技术,2013,36(04):251-255. DOI： 10.11889/j.0253-3219.2013.hjs.36.040648.

LI Yuan HE Yinbiao LIAO Jianhui HUANG Qing SHEN Rui. Finite element analysis of the flange sealing structure in the reactor system[J]. Nuclear techniques, 2013, 36(4): 040648 DOI： 10.11889/j.0253-3219.2013.hjs.36.040648.

摘要

在AP1000反应堆系统中

很多设备具有承压的功能

其密封性能直接关系到系统能否正常运行

因而密封失效是较之弹塑性失效、疲劳失效等更为基本的失效形式。在ASME规范中采用的密封结构设计方法是华脱尔斯法

此方法采用了一些保守的经验和假设

无法对密封结构处的变形和应力进行细致的计算。本文采用ANSYS有限元分析软件对核承压设备典型的密封结构进行了建模计算

提出了在有限元模型中螺栓预紧力和垫片的等效处理方法

能够对密封结构处垫片的回弹量、法兰的变形及应力分布进行预测。模型分析了采用华脱尔斯法进行密封设计时的设计余量

得到了垫片回弹量与设备内压之间的关系

对于核级承压设备密封结构的设计具有一定的借鉴意义。

Abstract

Background: In the AP1000 Reactor system

many devices sustain the pressure.Purpose: The sealing function of these devices is essential to ensure the structural integrity of the reactor system.Methods: In the ASME code

Waters method is adopted for the design of sealing structure.Although Waters code is very reliable

it can’t show the details of the deflection and stress distribution of the sealing structure under pressure.In this paper

a finite element method is developed to evaluate the typical sealing structure.The preload of the bolt and the spring back behavior of the gasket are also simulated by a proposed equivalent method.Results: With the finite element model

the spring back of the gasket

the deflection of the flange and the stress distribution of the sealing structure are predicted.Conclusions: Finally

The quantitative correlation between gasket spring back and inner pressure of the device is obtained

which provide a useful reference for the design of the sealing structure.

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