冷却塔刚性地基和相互作用模型下的动力特性分析

Dynamic Characteristic Analysis of Cooling Tower Rigid Foundation and Interaction Models

通过建立冷却塔刚性地基和相互作用模型,分别对这两种结构模型的动力特性进行分析,并把结果进行对比.结果表明,这种大口径薄壁结构表现出:局部振型密集、数量多且阶数靠前,整体振型分散且靠后的特点.考虑相互作用后,冷却塔结构的自振周期延长、振型发生改变.因此,在结构设计中,要重视考虑相互作用的影响.

Rigid foundation and interaction models are established for cooling tower. Dynamic characteristic analysis has been made for two models of cooling tower respectively. Comparative analysis of the results has been made. The results show that local vibration modes that lie forward of modes and have great quantity are intensive, while overall vibration modes that lie rearward of modes are dispersed. The natural period is prolonged and the vibration modes are changed when interaction is considered. Attention should be paid to effect of interaction for structure design.