【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。更多还原

【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.更多还原