压力容器2025，Vol.42Issue(3)：37-43,7.DOI:10.3969/j.issn.1001-4837.2025.03.005
固定拉杆球罐整体结构水平刚度及自振周期分析计算
Overall structural horizontal stiffness and natural vibration period analysis and calculation for fixed stay rod spherical tanks
李永泰 1张雨晨 1李超 1耿永丰1
作者信息
- 1. 合肥通用机械研究院有限公司,合肥 230031
- 折叠
摘要
Abstract
To address the lack of specialized calculation methods for fixed stay rod structures in spherical tanks domestically and internationally,this study proposes calculation methods for the horizontal stiffness of fixed stay rods between adjacent and alternate columns,horizontal flexibility of the entire spherical tank structure,and natural vibration period of spherical tanks,with relevant calculation software developed.Computational results from three case studies were compared with finite element analysis,the U.S.Uniform Building Code UBC 1997,and GB 12337 methods.Results indicate that compared to finite element calculations with actual material constants,UBC 1997 overestimates the natural vibration period by 3.5%～42.27%,while the present method underestimates it by 17.4%～24.76%.Smaller diameter-thickness ratios(more rigid shells)yield smaller calculation errors.GB 12337 method overestimates the period by 3.47%～84.65%.Finite element calculations with rigidized elastic modulus increased by two orders of magnitude show less than 1.8%error versus the present method,verifying its accuracy.Finite element flexibility and eigenvalue methods show under 1%period error.Horizontal stiffness for stay rods between alternate columns is 1.402～1.553 times that between adjacent columns,reducing natural periods to 80.24%～84.46%.This research provides technical support for revising China's spherical tank design standard GB 12337(adding fixed stay rod calculations).关键词
球罐/支柱/固定拉杆/球罐整体水平刚度/球罐自振周期Key words
spherical tank/column/fixed stay rod/overall horizontal stiffness/natural vibration period分类
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李永泰,张雨晨,李超,耿永丰..固定拉杆球罐整体结构水平刚度及自振周期分析计算[J].压力容器,2025,42(3):37-43,7.
