不同气动措施对特大型冷却塔风致响应及稳定性能影响分析

为研究不同气动措施对特大型冷却塔结构风致强度及稳定性能的影响，以内陆某核电特大型冷却塔为例，对无气动措施和增设3种气动措施冷却塔进行刚体测压风洞试验.基于试验结果对比分析了不同气动措施下冷却塔表面平均和脉动风压特性，然后采用有限元方法进行不同气动措施下特大型冷却塔的动力特性、风致响应、局部和整体稳定性能研究，最终提炼出不同气动措施对特大型冷却塔结构抗风性能的影响规律.
To study the wind-induced strength and stability properties of large cooling towers with different aerodynamic measures, the pressures of the rigid-body models without or with three different aerodynamic measures were measured by the wind tunnel tests. A nuclear super-large cooling tower inland was considered as the test specimen. The surface wind mean and fluctuating pressure characteristics were investigated from the test results. Furthermore, finite element analysis was conducted to evaluate the dynamic characteristics of natural vibration, the wind-induced response, and the overall and local stability. Finally, the effective rules of the different aerodynamic measures on wind resistance for super-large cooling tower were proposed.