胶囊形气膜结构风致气弹响应及风振系数研究  

Wind-induced aero-elastic response and vibration coefficients of capsule inflatable membrane structure

作　　者：陈昭庆[1,2] 宋鹏飞 闫科晔 武岳 苏宁[4] 曾聪 CHEN Zhao-qing;SONG Peng-fei;YAN Ke-ye;WU Yue;SU Ning;ZENG Cong(School of Civil Engineering and Architecture,Northeast Electric Power University,Jilin 132012,China;Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province,Northeast Electric Power University,Jilin 132012,China;Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]东北电力大学吉林省电力基础设施安全评估与灾害防治重点实验室,吉林吉林132012 [3]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,黑龙江哈尔滨150090 [4]交通运输部天津水运工程科学研究所,天津300456

出　　处：《振动工程学报》2024年第1期31-39,共9页Journal of Vibration Engineering

基　　金：国家自然科学基金面上项目(51878129);吉林省科技厅重点研发计划项目(20210203165SF);哈尔滨工业大学结构工程灾变与控制教育部重点实验室开放基金资助项目(HITCE202004)。

摘　　要：针对1/3矢跨比胶囊形气膜结构进行了气弹模型风洞试验,研究了结构的风致气弹响应变化规律,并给出了可供设计参考的风振系数。研究发现:结构平均变形呈迎风面凹陷,顶部隆起,横风向向外凸出的趋势,且这种变形趋势随着内压减小和风速增大越来越明显。0°风向角时的平均变形和振幅大于45°风向角时的平均变形和振幅大于90°风向角时的平均变形和振幅,结构合位移均值的极值出现在迎风面与顶面中心点;0°和45°风向角下,顶点竖向振幅>顺风向振幅>横风向振幅,结构以1阶模态振动为主;90°风向角下,顶点横风向振幅大于其他两个方向,结构以1阶和2阶模态叠加振动为主。各工况下结构的内压均有不同程度的减小。最后给出了考虑流固耦合效应的响应风振系数。Aero-elastic model wind tunnel test is carried out for a 1/3 rise-span ratio capsule-shaped pneumatic membrane struc-ture,the characteristics of the wind-induced aero-elastic response of the structure are studied and the wind-induced dynamic vibra-tion coefficients for practical design reference are given.The research confirms that the averaged deformation of the structure shows a trend of windward depression,top uplift and outward bulge in the transverse direction.This deformation trend is increasingly ob-vious with the decrement of internal pressure and the increment of wind speed.The averaged deformation and vibration amplitude decrease when the wind direction ranges from 0°up to 45°,then to 90°,and the extreme value of structural mean total displace-ments tends to appear at the center points of windward surface and top surface.Under 0°and 45°wind directions,the sort of vibra-tion amplitudes of different components is vertical component,along-wind component and cross-wind component in descending or-der.Moreover,the structural vibration is dominated by the first-order mode.Under 90°wind direction,the amplitude of the cross-wind direction is greater than two other directions,and the wind-induced vibration is dominated by the superposition of the first and second order modes.The internal pressure of the structure decreases in different extents under all cases.The response-based wind-induced dynamic vibration coefficients considering the fluid-structure interaction effect are given.

关 键 词：风致气弹响应 胶囊形气膜 气弹模型 风洞试验 响应风振系数 

分 类 号：TU311.3[建筑科学—结构工程]