充液大型储罐自振特性分析

英文篇名：Dynamic Characteristic Analysis of Large Scale Storage Tank
中文刊名：石油天然气学报
英文刊名：Journal of Oil and Gas Technology
作者：沈利英 ; 沈士明
英文作者：SHEN Li-ying (College of Mechanical and Power Engineering ; Nanjing University of Technology ; Nanjing 210009 ; Jiangsu ; China)SHEN Shi-ming (College of Mechanical and Power Engineering ; Nanjing University of Technology ; Nanjing 210009 ; Jiangsu ; China ; Research Center of Engineering Risk Analysis Technology ; SINOPEC ; Nanjing 210009 ; Jiangsu ; China)
中文关键词：大型储罐 ; 液罐耦合 ; 自振特性 ; 共振
英文关键词：large scale storage tanks ; liquid-tank coupling ; natural vibration characteristics ; resonance
出版日期：2008-06-15
机构：南京工业大学机械与动力工程学院;
年：2008
期：03
出版单位：石油天然气学报

摘要

结构的自振特性分析是大型储罐地震响应分析的重要组成部分,为给大型储罐的地震动力响应进一步分析提供依据,利用ANSYS软件建立了100dam3的大型储罐装有不同原油量时的有限元模型,考虑了液罐耦合作用,对罐内原油的晃动特性和液罐系统耦合自振特性进行计算。分析表明罐内原油高度对液罐系统的振动频率有影响,液罐系统本身的某些高阶振频率受到激发而产生共振效应,是矮胖型大型储罐罐壁底部在地震中遭破坏的一个重要原因。
Analysis of natural vibration characteristics was important for seismic response of large scale storage tanks.For further analysis of dynamic behaviors of large scale storage tanks in earthquake FEM models of 100 dam3 storage tank with different crude oil quantities were built with ANSYS program.Considering the coupling effect between the crude oil and tank,an analysis was made for the oil sloshing and natural vibration characteristics of a tank system.The results show that the height of crude oil is an important factor to vibration frequency of the tank system and resonance would happen when certain high order natural vibration frequencies of tank system are excited,which plays an important role in the seismic response of the large broad storage tanks.

引文

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