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基于声-固耦合算法考虑液体晃动的日用油箱的抗震分析

Seismic Analysis of Daily Fuel Tank Considering Liquid Sloshing Based on Acoustic-Structure Coupling Algorithm
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摘要 为了分析核电厂日用油箱在承受地震载荷时液体晃动对支座、支座螺栓的结构强度影响,本文基于声—固耦合算法,建立了日用油箱在空罐、30%液位、50%液位、80%液位、100%液位的有限元模型,采用ANSYS软件对各模型进行模态分析,输入SSE工况地震反应谱,采用谱分析法进行抗震计算。分析结果表明:模态分析各模型的一阶频率分别为28.36Hz、27.99Hz、26.06Hz、22.03Hz、18.32Hz,流体的附加质量效应大幅度降低了结构的固有频率值,下降幅度高达35.3%;谱分析SSE工况50%液位模型支座的应力最大,承受地震载荷时液位高度对支座应力的影响并不是线性的,其与结构的一阶频率、地震谱最大加速度对应频率区段有关。最后,按RCC-M评定准则对支座及支座螺栓进行了评定,其应力满足标准限值要求。 To analyze the effect of liquid sloshing on the structural strength of the support and support bolts of the daily fuel tank of the nuclear power plant when it is subjected to seismic load,based on acoustic-structure coupling algorithm,this paper establishes finite element model of the daily fuel tank in the empty cans,liquid level of 30%,50%,80%,100%,uses ANSYS software to conduct modal analysis of each model,inputs the seismic response spectrum of SSE working condition,and uses the spectral analysis method to calculate the seismic resistance..The analysis results show that the first-order frequencies of each model of the modal analysis are 28.36Hz,27.99Hz,26.06Hz,22.03Hz,and 18.32Hz.The additional mass effect of fluid greatly reduces the natural frequency of the structure by 35.3%.The stress of the 50%liquid level model support of the spectral analysis SSE is the largest,and the influence of lthe iquid level height on the stress of the support when bearing the seismic load is not linear is not linear,which is related to the first-order frequency of the structure and the frequency brand corresponding to the maximum acceleration of the seismic spectrum.Finally,the support and bolts are evaluated according to RCC-M evaluation criteria,and the stress meets the standard limit requirements.
作者 罗欢 韩娟 陈雪瑶 施少波 LUO Huan;HAN Juan;CHEN Xueyao;SHI Shaobo(China Nuclear Power Operation Technology Corporation,Ltd.,Wuhan,Hubei Province,430223 China)
出处 《科技创新导报》 2022年第4期10-13,共4页 Science and Technology Innovation Herald
关键词 声—固耦合 液体晃动 模态分析 谱分析 Acoustic-structure coupling Liquid sloshing Modal analysis Spectrum analysis
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