【摘要】 贮液结构主要用于工业企业贮存清水、污水、石油和化学液体等。为了计算这类结构的地震响应,首先必须知道结构的自振频率和相应的振型。因此,针对无液贮液结构,考虑弯曲变形和剪切变形,推导了振型和频率方程。为方便工程应用,利用MATLAB软件,得到了前三阶振型的计算图表,并对不同高度不同变形理论的自振特性进行了分析。通过数值算例表明了文中结论的正确性,从而为这类结构的自振和地震响应分析奠定了基础。更多还原

【Abstract】 Liquid-storage tanks,mostly used to reserve rinsing,sewerage,petroleum and chemistry liquid,are broadly applied in such industry corporations as water-supply and drainage industry,sewerage-disposal industry,petroleum industry,chemistry industry and so on.For the sake of computing preferably earthquake responding of these structures,the characteristics of their free vibration,like frequency of free vibration and corresponding oscillation-mode,have to be known beforehand.Therefore,for the liquid-storage tanks without liquid,the equations about oscillation-mode and frequency based on bending-shearing model are deduced,and at the same time,the calculation tables and chart of former three oscillation-modes are presented by using MATLAB program,and free vibration characteristics using different deformation theory in different heights are analyzed.The correctness of the result is proved by calculation example,and a theory base is provided for analyzing subsequent free vibration and earthquake responding of this type of structure.更多还原