大型储罐的模态分析  

MODEL ANALYSIS OF LARGE STORAGE TANKS

作　　者：沈利英[1] 沈士明[2] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏省南京市210009 [2]中国石油化工股份有限公司工程风险分析技术研究中心,江苏省南京市210009

出　　处：《炼油技术与工程》2008年第5期59-62,共4页Petroleum Refinery Engineering

基　　金：中国石油化工股份有限公司科技开发项目(306005)

摘　　要：大型储罐的抗震研究显得日益重要,为了给储罐地震动力响应的进一步分析提供数据,利用ANSYS通用软件,建立了大型储罐的简化模型,分析了大型储罐空罐的自振特性,分别提取了锚固和非锚固罐的前30阶固有模态。对所提取的两种储罐的模态进行了分析对比,结果表明:大型储罐空罐的主要振型为环向多波振型,各种振型中罐壁上部的相对位移较大,锚固罐的各阶频率略大于非锚固的各阶频率。Anti-seismic research is becoming increasingly important for large storage tanks. For further analysis of dynamic behaviors of the tanks in earthquake, simplified models were built with ANSYS program, and the first 30 modes of anchored and unanchored tanks were extracted to analysis the characteristics of natural vibration for large storage tanks. Analysis and comparisons are made for modes of the two different kinds of tanks. It is concluded that, most models of the empty large storage tanks show multiple circumferential waves, and the upper parts of the tanks in these models show relative large displacement, and the frequencies of anchored tanks are a little higher than those of unanchored tanks.

关 键 词：大型储罐 地震 有限元模型 模态分析 

分 类 号：TE972[石油与天然气工程—石油机械设备] TU435[建筑科学—岩土工程]