主蒸汽隔离阀地震概率易损性分析

兰州理工大学学报 ›› 2020, Vol. 46 ›› Issue (3): 70-74.

主蒸汽隔离阀地震概率易损性分析

俞树荣, 陈栋然, 薛睿渊, 张希恒

兰州理工大学石油化工学院, 甘肃兰州 730050

收稿日期:2019-01-08 出版日期:2020-06-28 发布日期:2020-08-19
作者简介:俞树荣(1962-),男,甘肃兰州人,博士,教授,博导.

Seismic probability fragility analysis of main steam isolation valve

YU Shu-rong, CHEN Dong-ran, XUE Rui-yuan, ZHANG Xi-heng

College of Petroleum and Chemical Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2019-01-08 Online:2020-06-28 Published:2020-08-19

摘要/Abstract

摘要： 采用有限元软件对主蒸汽隔离阀进行等效静力计算,确定其抗震薄弱点,并运用概率易损性方法计算主蒸汽隔离阀的抗震裕度.计算结果表明:主蒸汽隔离阀的抗震薄弱点随着地震震动的放大会发生转移.经过计算,确定主蒸汽隔离阀的抗震薄弱点为支架,计算出支架在95%置信度、5%失效概率下的抗震能力为11.14g,在此基础上绘制了主蒸汽隔离阀在弹性失效模式下的不同置信水平的易损性曲线,梳理了核电阀门抗震裕度的计算方法,论证了在超设计基准地震发生时,抗震裕度对于抗震安全的重要性.

关键词: 超设计基准, 主蒸汽隔离阀, 抗震裕度, 抗震薄弱点, 易损性曲线

Abstract: The finite element software is used to calculate the equivalent static force of a main steam isolation valve to predict its seismic weak point, and to calculate seismic margin of the main steam isolation valve by using probability vulnerability method. The results show that a seismic weak point of the main steam isolation valve may shift with amplification of seismic vibrations. By doing calculations, the seismic weak point of the main steam isolation valve is determined to be supporting bracket, and the seismic capacity of the supporting bracket under 95% confidence along with 5% failure probability is calculated to be 11.14g. On this basis, fragility curves of the main steam isolation valve with different confidence levels under elastic failure mode were drawn. The calculation method of seismic margin of nuclear power valves was combed out, and the importance of seismic margin for seismic safety was demonstrated when the earthquake occurs beyond the design benchmark.

Key words: over design benchmark, main steam isolation valve, seismic margin, seismic weakness, fragility curve

中图分类号:

俞树荣, 陈栋然, 薛睿渊, 张希恒. 主蒸汽隔离阀地震概率易损性分析[J]. 兰州理工大学学报, 2020, 46(3): 70-74.

YU Shu-rong, CHEN Dong-ran, XUE Rui-yuan, ZHANG Xi-heng. Seismic probability fragility analysis of main steam isolation valve[J]. Journal of Lanzhou University of Technology, 2020, 46(3): 70-74.

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