地震载荷对核电阀门可运行性影响机理研究
Investigation on the Damage Mechanism of the Nuclear Power Valves Operability under Seismic Conditions
俞树荣 1李尤 1薛睿渊 1马子睿1
作者信息
摘要
核电阀门在地震期间可否运行主要通过试验进行鉴定,为了降低核电阀门设计成本,以某闸阀为例,总结基于分析法的核电阀门可运行性抗震鉴定流程,并阐明地震对阀门可运行性的影响机理.运用有限元法研究阀门启闭过程中遭受地震载荷时其各部位的应力与接触压力的变化,分别基于可运行性和结构完整性对阀门进行抗震校核.结论如下:地震对阀门可运行性的影响在于放大了阀门滑动摩擦部位的接触压力,导致阀门闭合所需要克服的摩擦力增加,延后阀门闭合动作;与结构完整性分析相比,基于可运行性分析的抗震鉴定过程更加全面、苛刻.
Abstract
The operability of nuclear power valves during earthquake is mainly evaluated with tests.In or-der to reduce the design cost of nuclear power valves,having the analysis method based and a gate valve taken as an example to summarize seismic qualification process for the nuclear power valve's operability was implemented,including expounding impact mechanism of earthquake on the operability of valves,making use of the finite element method to research both stress and contact pressure changes of each part of the valve when it is subjected to seismic load during opening and closing process,as well as conducting the seismic check of the valve based on the operability and structural integrity,respectively.It's concluded that,the earthquake's influence on the valve operability can amplify the contact pressure of sliding friction parts,enhance the friction on closing and postponing valve.The seismic identification process based on op-erational analysis is more comprehensive and demanding.
关键词
核电阀门/抗震鉴定/可运行性/分析法Key words
nuclear power valve/seismic qualification/operability/analysis method引用本文复制引用
基金项目
甘肃省青年科技基金计划(22JR5RA297)
出版年
2024
NETL
NSTL
维普
万方数据