核电站冷却管接头的热应力及振动分析
刘涛，邓强，刘源，龙超
（西南交通大学 机械工程学院，四川 成都 610031）
摘要：核电站冷却管接头在冷热混流和外界机械载荷的作用下会产生热疲劳和振动破坏，严重影响核电站设备的安全运行。针对该问题，通过对冷却管接头有限元模型进行研究，重点从冷热混流引起的热疲劳和模态参数两方面进行研究，确定了冷却管接头三维温度场和热应力场的分布情况，提出了因冷热混流而产生热疲劳的防治措施，获得了冷却管接头的模态参数，为研究人员在冷却管接头疲劳强度设计、避免对固有频率激励、振动故障诊断和预报时提供了依据，从而降低冷却管接头因热疲劳和过度振动而引起的破坏。
关键词：热疲劳；振动；模态分析；温度场；热应力
中图分类号：TH114 文献标志码：A doi：10.3969/j.issn.1006-0316.2015.11.007
文章编号：1006－0316 (2015) 11－0022－05
The thermal stress and vibration analysis of cooling pipe joint in nuclear power plant
LIU Tao，DENG Qiang，LIU Yuan，LONG Chao
( School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China )
Abstract：The heat and cold mixed flow and the external mechanical loads will cause thermal fatigue and vibration damage to the cooling pipe joints in the nuclear plant related more to the safe operation of the equipments. To solve the problem, the finite element model of cooling joint pipe was studied mainly by two aspects of thermal fatigue and modal parameters caused from the mixed flow. To determine the distribution of three dimensional temperature field and thermal stress field of the cooling pipe joint. The measures was taken to prevent thermal fatigue generated from the mixed flow. The determination of modal parameters for the cooling pipe provides a basis for researchers in the design of fatigue strength of connecting pipe, avoiding incentives on the natural frequency, the diagnosis and forecast for vibration breakdowns. Thereby the damage to the cooling pipe joints due to thermal fatigue and excessive vibration was minimized.
Key words：thermal fatigue；vibration；modal analysis；temperature field；thermal stress
———————————————
收稿日期：2015－05－20
作者简介：刘涛（1988－），男，羌族，四川绵阳人，硕士，主要研究方向为机械结构强度分析。
- 上一篇：基于流固耦合法的一种新型过滤器的结构优化
- 下一篇：热泵式风能制热试验分析
设为首页 | 加入收藏 | 免责条款
《机械》杂志版权所有 Copyright©2008-2012 Jixiezazhi.com All Rights Reserved
电话：028-85925070 传真：028-85925073 E-mail：jixie@vip.163.com
地址：四川省成都锦江工业开发区墨香路48号 邮编：610063
Powered by PageAdmin CMS