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(1 同濟(jì)大學(xué)航空航天與力學(xué)學(xué)院，上海 200092； 2 中材科技風(fēng)電葉片股份有限公司，北京 102101；3 上海建筑設(shè)計研究院有限公司，上海 200041)

［摘要］在風(fēng)洞試驗同步測壓的基礎(chǔ)上，擬合了越南廣寧體育場懸挑屋蓋脈動風(fēng)壓自譜和相干函數(shù)經(jīng)驗表達(dá)式，采用準(zhǔn)確的屋蓋隨機(jī)風(fēng)振計算方法分析了上、下風(fēng)向下懸挑屋蓋結(jié)構(gòu)的風(fēng)致動力響應(yīng)，重點分析了豎向動位移根方差響應(yīng)隨參振振型數(shù)的變化，研究了多振型和振型交叉項對其響應(yīng)的影響規(guī)律。研究表明，越南廣寧體育場雙側(cè)懸挑屋蓋可只考慮前5階振型，無需考慮振型交叉項的影響。

［關(guān)鍵詞］大型體育場；懸挑屋蓋結(jié)構(gòu)；風(fēng)致動力響應(yīng)；多振型；振型交叉項

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

作者簡介：劉丹，碩士，Email:suns791201@163.com。

參考文獻(xiàn)

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［3］黃本才，齊輝，陳勇.越南國家體育場大懸挑屋蓋脈動風(fēng)振型力譜與位移譜［J］.同濟(jì)大學(xué)學(xué)報(自然科學(xué)版)，2004，32(5)：622-626.

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［5］顧明，周毅.大跨度屋蓋結(jié)構(gòu)等效靜力風(fēng)荷載方法及應(yīng)用［J］.建筑結(jié)構(gòu)學(xué)報，2007(28)：125-129.

［6］汕頭大學(xué)風(fēng)洞實驗室.越南廣寧體育場風(fēng)荷載風(fēng)洞試驗研究報告［R］.2007.

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