绝热层对大型LNG储罐动力特性影响分析

英文篇名：Analysis on the influence of thermal insulation layer on the dynamical characteristic of large-scale LNG storage tank
中文刊名：低温与超导
英文刊名：Cryogenics & Superconductivity
作者：陈叔平 ; 马志鹏 ; 任金平 ; 刘福录 ; 李延娜 ; 任永平
英文作者：Chen Shuping ; Ma Zhipeng ; Ren Jinping ; Liu Fulu ; Li Yanna ; Ren Yongping ; College of Petrochemical Engineering ; Lanzhou University of Technology ; Lanpec Technology Limited
中文关键词：大型LNG储罐 ; 绝热层 ; 模态分析 ; 地震响应分析
英文关键词：Large-scale LNG storage tank ; Thermal insulation layer ; Modal analysis ; Seismic response analysis
出版日期：2015-04-20
机构：兰州理工大学石油化工学院;甘肃蓝科石化高新装备股份有限公司;
年：2015
期：04
出版单位：低温与超导

摘要

为了研究绝热层对大型LNG储罐动力特性的影响,基于ANSYS有限元软件,分别建立有绝热层和无绝热层的2×104m3LNG储罐模型,对这两种模型分别进行模态分析和地震响应分析,得到自振特性和动力响应情况。研究结果表明:有绝热层储罐模态振型主要发生在拱顶,无绝热层储罐在罐壁,绝热层的存在增大了储罐的固有频率,改变了储罐位移变形量、变形发生的部位及储罐的应力分布,并且减小了等效应力,对罐壁底部发生局部失稳具有很好改善作用。
In order to study the influence of thermal insulation layer on the dynamical characteristic of large-scale LNG storage tank,LNG storage tank models of 2 × 104m3 with thermal insulation layer and without thermal insulation layer were built,respectively,and modal analysis and seismic response analysis of these two models were carried out to obtain the vibration characteristics and dynamic response based on ANSYS finite element software. The results show that the modal shapes of the storage tank with thermal insulation layer occurs in the vault and without thermal insulation layer occurs in the tank wall. The thermal insulation layer increases the inherent frequency of the storage tank and changes the displacement deformation,the deformation position as well as the stress distribution. In addition,the thermal insulation layer also reduces the equivalent stress and effectively improves the occurrence of the local bucking on the tank wall near the bottom.

引文

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