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(1 中國科學(xué)院高能物理研究所, 北京 100049; 2 中國科學(xué)院大學(xué)核科學(xué)與技術(shù)學(xué)院, 北京 100049;3 江蘇湯臣新材料有限公司, 泰興 225434)
摘要: 有機(jī)玻璃材料越來越廣泛地應(yīng)用于建筑結(jié)構(gòu)、海洋工程、粒子物理實(shí)驗(yàn)等各個(gè)領(lǐng)域. 對某廣場一直徑為24m 的大型有機(jī)玻璃碗進(jìn)行結(jié)構(gòu)設(shè)計(jì),為縮短施工工期,有機(jī)玻璃碗采用多環(huán)形結(jié)構(gòu),各有機(jī)玻璃環(huán)可平行獨(dú)立制作. 為了保證結(jié)構(gòu)的可靠性,采用 ABAQUS 有限元軟件進(jìn)行摩擦邊界的非線性力學(xué)分析. 建立有機(jī)玻璃碗和鋼網(wǎng)殼支撐結(jié)構(gòu)模型,探索了兩者接觸面接觸形式和接觸摩擦系數(shù)對結(jié)構(gòu)的受力影響. 采用單一安全系數(shù)法對結(jié)構(gòu)在不同邊界條件下進(jìn)行分析校核,結(jié)果顯示,摩擦系數(shù)對有機(jī)玻璃碗受力影響很小,有機(jī)玻璃碗各工況下的應(yīng)力小于5. 5MPa,滿足設(shè)計(jì)要求.
關(guān)鍵詞: 有機(jī)玻璃碗; 環(huán)形結(jié)構(gòu); 鋼網(wǎng)殼; 摩擦系數(shù); 支撐邊界設(shè)計(jì)
中圖分類號:TU382,TU311. 41 文獻(xiàn)標(biāo)志碼:A 文章編號: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
∗中國科學(xué)院青年創(chuàng)新促進(jìn)會(2920200000087),中國科學(xué)院先導(dǎo)專項(xiàng)(XDA10010200), 中國科學(xué)院高能物理研究所謝家麟基金(512020000107).
第一作者:錢小輝,博士,高級工程師,主要從事有機(jī)玻璃材料測試研究,中微子探測器設(shè)計(jì)工作, Email:qianxh@ ihep.ac.cn.
[引用本文] 錢小輝,馮益,陳海霞,等. 大型有機(jī)玻璃碗結(jié)構(gòu)多工況有限元分析[ J]. 建筑結(jié)構(gòu),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.
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