摘要
核电设备的抗震性能是衡量其安全可靠性的重要指标之一。本文针对一种大型核电站用楔形双闸板闸阀进行了抗震性能分析。首先,基于ANSYS平台对该阀门的基频进行分析,确定了抗震分析的方法,即等效静力法;其次,基于所采用的方法,对其在承受工况载荷、地震载荷以及自身重力情况下的受力进行了分析,得到了阀门的等效应力应变,在该过程中,为减少单纯载荷反应产生的叠加误差,采用了将各个方向的振型进行综合开方的方法;最后,根据ASME应力评价规范,在阀门组件危险点处划定路径并进行评定。结果表明,所划定的3条危险路径应力分布均未超过阀门所能承受的应力极限值,即所设计的阀门符合设计规范,能够满足工况要求。论文分析结果为该类核一级电站阀门的抗震分析以及进一步结构优化设计提供了参考依据。
Seismic performance of nuclear power equipment is one of the important indexes measuring its safety and reliability analysis system.In this paper,the seismic performance of a wedge-shaped double-gate for nuclear power plant is analyzed.First of all,the seismic analysis method,namely the equivalent static method,is determined by analyzing the basic frequency of the valve based on ANSYS platform.Secondly,based on the adopted method,the stress analysis of the valve under working condition load,seismic load and its own gravity is carried out,and the equal stress and deformation are obtained.In this process,in order to reduce the superposition error caused by the simple load reaction,the method of taking the comprehensive square root of the vibration modes in all directions is adopted.Finally,according to the ASME stress evaluation code for pressure vessels,the valve components are evaluated along the path of the danger point.The results show that,the stress distribution in the three defined danger paths does not exceed the limit value of the stress that the valve can withstand,which means that the designed method conforms to the design specification and can meet the requirements of working conditions.The analysis results provide a reference for seismic analysis and further structural optimization design of this kind of nuclear first class valves in power stations.
作者
董学莲
廖佳敏
张聪林
赵雄
费凌
DONG Xuelian;LIAO Jiamin;ZHANG Conglin;ZHAO Xiong;FEI Ling(College of Mechanical Engineering,Xihua University,Chengdu 610039,China)
出处
《热力发电》
CAS
北大核心
2019年第10期111-116,共6页
Thermal Power Generation
基金
四川省教育厅项目(182494)
西华大学校重点项目(217222)~~
关键词
楔形双闸板
闸阀
核电
抗震性能分析
等效静力法
应力评价
ANSYS
wedge-shaped double-gate
gate valve
nuclear power
seismic performance analysis
equivalent static method
stress evaluation
ANSYS
作者简介
第一作者:董学莲(1993),女,硕士研究生,主要研究方向为机械结构设计与机电控制技术,dongxuelian11@163.com;通讯作者:张聪林(1993),男,硕士研究生,主要研究方向机械制造与自动化技术,ZCL554411@163.com。
