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推导出振型能量贡献系数计算方法,以某体育会展中心会展馆和体育场的飘带形大跨屋盖系统模型风洞试验结果为基础,由贡献系数挑选了主导振型,分析体育馆振型能量,提出振型背景位移响应与共振位移响应耦合系数的计算方法,并通过体育馆数值算例进行分析验证。结果表明:飘带形大跨屋盖中耦合系数的数值范围要比简单单层球面网壳大许多,在使用能量贡献法挑选振型时,忽略耦合效应时飘带结构响应产生的误差范围较大,需要进行模态补偿。
Based on the wind tunnel test results of a ribbon-shaped long-span roof system model of a convention center and a sports stadium in a certain stadium, the dominant mode shapes are selected from the contribution coefficients, and the energy of vibration modes , A method to calculate the coupling coefficient between the response of mode shapes and the response of resonance displacement is proposed and verified by the numerical example of the gymnasium. The results show that the range of the coupling coefficient in the span-shaped long-span roof is much larger than that of the simple single-layer spherical reticular shell. When the energy contribution method is used to select the vibration mode, the error range of the streamer structure response is neglected when the coupling effect is neglected. Modal compensation required.