(1 同济大学航空航天与力学学院，上海 200092； 2 中材科技风电叶片股份有限公司，北京 102101；3 上海建筑设计研究院有限公司，上海 200041)

［摘要］在风洞试验同步测压的基础上，拟合了越南广宁体育场悬挑屋盖脉动风压自谱和相干函数经验表达式，采用准确的屋盖随机风振计算方法分析了上、下风向下悬挑屋盖结构的风致动力响应，重点分析了竖向动位移根方差响应随参振振型数的变化，研究了多振型和振型交叉项对其响应的影响规律。研究表明，越南广宁体育场双侧悬挑屋盖可只考虑前5阶振型，无需考虑振型交叉项的影响。

［关键词］大型体育场；悬挑屋盖结构；风致动力响应；多振型；振型交叉项

Influence on wind-induced vibration response of multiple mode shape and cross part of mode displacement of Quang Ninh Stadium cantilever roof in Vietnam

Liu Dan1,2, Huang Bencai1, Wang Congjun1, Lin Gao3(1 School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China;2 Sinomatech Wind Power Blade Co.,Ltd., Beijing 102101, China;3 Shanghai Institute of Architectural Design and Research Co.,Ltd., Shanghai 200041, China)

Abstract:Based on the sync wind pressure measured in wind tunnel test, the authors integrated the power spectral density and the experience expression of coherent function of the cantilever roof of Quang Ninh Stadium in Vietnam，analyzed the response of wind-induced vibration of the windward roof and the leeward roof by the accurate computational method of random roof wind-induced vibration，especially the standard deviation response of vertical dynamic displacement change with the number of calculated modes，researched the laws of multiple mode shape and cross part of mode displacement to its response influence. Finally the result was got that only the fifth-order mode shape to the cantilevered roof of Quang Ninh Stadium in Vietnam should be considered and the influence of cross part of mode displacement can be ignored.

Keywords:large stadium; cantilever roof; wind-induced vibration response; multiple mode shape; cross part of mode displacement

作者简介：刘丹，硕士，Email:suns791201@163.com。

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