摘要
以某石油化工工程中的大长径比框架式高塔为对象,对这类框架塔设备的自振特性进行分析。分析表明,框架塔设备结构是一种由塔设备和框架组成的多系统静耦合结构,在模态(振型)上仍保持单塔和框架原有的模态特征,但受相互间的变形协调耦合影响而发生周期改变;耦合作用对弯曲型模态影响较大,对扭转型模态无影响;变形协调约束的数量对框架塔设备的耦合程度有影响,但对基频的影响可忽略。框架塔设备这种形式的工程设计已不能按单塔来计算,而应按多体系组合结构进行分析计算。
This paper takes a practical flamed high-column in large long-diameter ratio as aanalysis object in petro-chemical engineering, and free-vibration analysis have been done for this typecolumn. The analysis indicated that framed high-column structure is a multi-system static-couplingstructure composed of column and frame. It keeps a original mode behavior of single column andpure frame structure, and period will be changed due to the effect of deformation coupling mutually.The coupling effect influence to bend mode, and not to torsion mode. The numbers of deformationcoordinate constraint will influence the degree of coupling of column and frame, but not to fundamentalfrequency. Analysis also indicated engineering design for this type structure cannot referred to singlecolumn, and shall be based on multi-system composed structures.
出处
《建筑技术》
北大核心
2017年第5期527-531,共5页
Architecture Technology
关键词
框架塔设备
自振特性
模态
耦合
framed high-column
flee-vibration behavior
mode
coupling
