地震下双曲线冷却塔的响应分析

Seismic Response Analysis of Hyperbolic Cooling Towers

摘要:

借助ANSYS软件建立双曲线冷却塔的有限元分析模型，讨论自重、风荷载和地震作用下冷却塔的力学性能，通过计算、分析探讨塔筒局部开洞对冷却塔整体及洞口局部强度的影响，主要考虑洞口尺寸和开洞高度对冷却塔整体及洞口局部应力分布规律的影响。结果表明：在一定尺寸范围内，开设洞口对冷却塔的整体强度影响较小，但在洞口局部出现明显的应力集中效应；90 m高度处洞口的应力集中效应低于15 m高度处洞口的应力集中效应，但应力集中效应不容忽视。分析结果为冷却塔结构抗震的设计、加固和施工提供了理论依据和实用的参考建议。

Abstract:

This work applies the finite element analysis software ANSYS to establish a finite element analysis model of hyperbolic cooling towers. The model is used to explore the mechanical properties of hyperbolic cooling towers under the action of self-weight, wind load, and earthquakes and to investigate the effect of local opening on the overall and local strength of the tower. The influences of the size and height of the opening hole on the stress distribution of the whole tower and local opening holes are analyzed. Results show that under the action of wind load, the displacement of the cooling tower is large, and wind load acts as the control load of the cooling tower. The opening has negligible effect on the overall strength of the cooling tower within a certain size range. A pronounced stress concentration effect, however, exists around the hole. The stress concentration effect around a hole with a height of 90 m is lower than that around a hole with a height of 15 m but cannot be ignored.