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(華南理工大學(xué)建筑學(xué)院，廣州510640)

［提要］分析了網(wǎng)殼結(jié)構(gòu)中自振頻率、阻尼比等因素對共振響應(yīng)在總風(fēng)振響應(yīng)中貢獻(xiàn)的影響，利用考慮高階振型共振響應(yīng)的綜合模態(tài)法計(jì)算了單層網(wǎng)殼的風(fēng)振響應(yīng)，討論了計(jì)算綜合模態(tài)時(shí)所需的振型數(shù)。針對結(jié)構(gòu)自振頻率密集的特性，研究了考慮振型互相關(guān)貢獻(xiàn)的必要性、影響振型互相關(guān)貢獻(xiàn)的因素和計(jì)算振型互相關(guān)貢獻(xiàn)所需的振型數(shù)。最后，通過具體的算例分析驗(yàn)證了相關(guān)結(jié)論。

［關(guān)鍵詞］單層網(wǎng)殼結(jié)構(gòu)；背景響應(yīng)；共振響應(yīng)；綜合模態(tài)；振型互相關(guān)

Quasi-mode Method with Resonance for Wind Vibration Response of Latticed Shell Structures/Wei Demin,Bian Jianfeng(College of Architecture & Civil Engineering,South China University of Technology,Guangzhou 510640,China)

Abstract:The effect of the factors such as self-vibration frequency and the damp ratios of the shell structures on the ratio of the resonance response is analyzed to the wind-induced vibration response. The quasi-mode method considering the resonance response of the high modes is used to calculate the wind-induced vibration response of single-layer latticed shell and the mode numbers needed for calculating the quasi-mode is discussed. Because the self-frequencies are very close,the necessity of considering the mode cross-correlation contribution,the effect factors to the mode cross-correlation contribution and the mode numbers for calculating the mode cross-correlation contribution are studied.At last,through the computation of the detailed example,some conclusions are verified.

Keywords:single-layer latticed shell; background response; resonance response; quasi-mode; mode cross-correlation