(1 中国科学院高能物理研究所, 北京 100049; 2 中国科学院大学核科学与技术学院, 北京 100049;3 江苏汤臣新材料有限公司, 泰兴 225434)

摘要: 有机玻璃材料越来越广泛地应用于建筑结构、海洋工程、粒子物理实验等各个领域. 对某广场一直径为24m 的大型有机玻璃碗进行结构设计,为缩短施工工期,有机玻璃碗采用多环形结构,各有机玻璃环可平行独立制作. 为了保证结构的可靠性,采用 ABAQUS 有限元软件进行摩擦边界的非线性力学分析. 建立有机玻璃碗和钢网壳支撑结构模型,探索了两者接触面接触形式和接触摩擦系数对结构的受力影响. 采用单一安全系数法对结构在不同边界条件下进行分析校核,结果显示,摩擦系数对有机玻璃碗受力影响很小,有机玻璃碗各工况下的应力小于5. 5MPa,满足设计要求.

关键词: 有机玻璃碗; 环形结构; 钢网壳; 摩擦系数; 支撑边界设计

中图分类号:TU382,TU311. 41 文献标志码:A 文章编号:1002⁃848X(2022)08⁃0042⁃06

DOI:10. 19701 / j.jzjg.20200887

Finite element analysis of large polymethyl methacrylate bowl⁃shaped structure under multi⁃load condition

QIAN Xiaohui1,2, FENG Yi3, CHEN Haixia3, ZHANG Gaofeng3, XIAO Jianxia3,CHENG Wei3, MA Xiaoyan1, HENG Yuekun1,2

(1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China; 2 School of NuclearScience and Technology, University of Chinese Academy of Science, Beijing 100049, China;3 Jiangsu Donchamp New Material Technology Co., Ltd., Taixing 225434, China)

Abstract: The materials of polymethyl methacrylate(PMMA) have been widely used in the field of building structures,marine projects, particle physic experiments, and so on. A large PMMA bowl⁃shaped structure with a diameter of 24m wasdesigned. In order to shorten construction period, the PMMA bowl adopts multi⁃ring structure, and each PMMA ring can bemade independently in parallel. In order to ensure the long⁃term reliability of the structure, the finite element analysissoftware of ABAQUS was used for the nonlinear mechanical analysis of the friction boundary. A model of PMMA bowl andits steel latticed shell supporting structure was established, and the influence of the contact boundary condition and frictioncoefficient between PMMA bowl and steel structure was explored. Single safety factor method was used to analyze and verifythe structural stress of different contact boundaries. The results show that the friction coefficient has little effect on the stressof PMMA bowl. The stress of the PMMA bowl is less than 5. 5MPa under various working conditions, which meets thedesign requirement.

Keywords:polymethyl methacrylate bowl; ring structure; steel latticed shell; friction coefficient; support boundary design

∗中国科学院青年创新促进会(2920200000087),中国科学院先导专项(XDA10010200), 中国科学院高能物理研究所谢家麟基金(512020000107).

第一作者:钱小辉,博士,高级工程师,主要从事有机玻璃材料测试研究,中微子探测器设计工作, Email:qianxh@ ihep.ac.cn.

[引用本文] 钱小辉,冯益,陈海霞,等. 大型有机玻璃碗结构多工况有限元分析[ J]. 建筑结构,2022,52(8):42⁃47. QIAN Xiaohui, FENG Yi, CHEN Haixia, et al. Finite element analysis of large polymethyl methacrylate bowl⁃shapedstructure under multi⁃load condition[J]. Building Structure,2022,52(8):42⁃47.