(1 北京航化节能环保技术有限公司, 北京 100176;2 北京交通大学土木建筑工程学院, 北京 100044)

摘要: 北京 2022 年冬奥会和冬残奥会场内主火炬是典型的舞美造型结构体,区别于传统火炬,此次主火炬需要实现部分表演功能,而且在表演过程中要完成提升、翻转和旋转等动作. 主火炬结构区别于传统结构,有限元分析包括多种设计工况,设计工况根据实际工作状态确定. 同时,整体结构造型特殊,呈大面积薄壁状,为典型的风敏感结构,结构设计规范中并没有给出明确的风荷载数值供参考,采用了风洞试验方法获取了不同工作状态下 0° ~360°各个风向角的风荷载,确立了真实的设计工况. 然后通过 ANSYS 有限元软件建立主火炬结构的有限元模型,计算了结构在各种不同设计工况下的应力与位移,结果显示:各个工况下主火炬应力满足强度要求,位移满足刚度要求. 在四场仪式上,主火炬结构完美地完成了表演任务.

关键词: 冬奥会; 冬残奥会; 主火炬; 有限元分析; 薄壁结构; 风洞试验

中图分类号:TU311. 41,TU395 文献标志码:A 文章编号:1002-848X(2023)09-0085-06

DOI:10. 19701 / j. jzjg. 20221265

Finite element analysis of Beijing 2022 Olympic Winter Games and Winter Paralympic Games cauldron in National Stadium under multi-load cases

HU Tao1, WANG Ruifang1, LIU Yue1, SONG Xiaofeng1, LI Bo2

(1 Beijing Aerospace-Petrochemical Energy Conservation & Enviroment Protection Technology Co. , Ltd. , Beijing100176, China; 2 School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

Abstract: Beijing 2022 Olympic Winter Games and Winter Paralympic Games cauldron in National Stadium is a typicaldance beauty modeling structure, which takes on part of the performance function different from traditional cauldron. Theperformance process must complete the lifting, the turning and the rotation and so on. The cauldron structure is differentfrom the traditional structure. The finite element analysis includes a variety of design cases which is determined according tothe actual working condition. At the same time, the structure is a special shape and a large area thin-walled structure,which is a typical wind-sensitive structure. There is no explicit wind load in the structural design code for reference, so thewind tunnel test was used to obtain the loads of 0 ° ~ 360 ° wind direction angles under different working cases, then thereal design cases were established. The finite element model of the cauldron structure was established by software ANSYS,and the stress and displacement of the structure were calculated. The results show that the stress meets the requirement ofstrength and the displacement meets the requirement of stiffness. The whole structure completed the performance taskperfectly in the four ceremonies.

Keywords:Olympic Winter Games; Winter Paralympic Games; cauldron; finite element analysis; thin-walled structure;wind tunnel test

∗ 国家重点研发计划项目(2021YFF0308000) .

第一作者:胡涛,硕士,高级工程师,主要从事节能环保装置和非标结构设计与研发,Email:hut@ calt11. cn.

[引用本文] 胡涛,汪瑞方,刘悦,等. 北京 2022 年冬奥会和冬残奥会场内主火炬结构多工况有限元分析 [ J]. 建筑结构,2023,53(9):85-90,6. HU Tao,WANG Ruifang,LIU Yue,et al. Finite element analysis of Beijing 2022 WinterGames and Winter Paralympic Games cauldron in National Stadium under multi-load cases[ J]. Building Structure,2023,53(9):85-90,6.