塔器、烟囱等高耸结构诱导振动的振因、振害分析及减振对策  

THE INDUCED VIBRATION ANALYSIS AND COUNTERMEASURE FOR TOWERS AND STACKS

作　　者：元少昀[1] 

机构地区：[1]中国石化工程建设公司,北京100101

出　　处：《石油化工设备技术》2009年第6期5-8,4,共5页Petrochemical Equipment Technology

摘　　要：分析了塔器或烟囱在风载荷作用下的振动形式,重点分析了横风向振动的产生机理、发生条件、横风向共振的判定以及振动的危害;列举了因风诱导振动导致结构破坏的一些实例。对比了塔器在抗诱导振动方面比烟囱的有利条件;从设计的角度,简要分析了SW6软件在塔器诱导振动计算方面的不足,归纳了减振的主要途径是增加结构的固有频率、提高结构的阻尼或破坏卡门涡街的形成;并结合工程实际,提出、总结了工程中可行的多种减振措施。Analyzes the vibration type of towers and stacks under the condition of wind load,central on the creation mechanisms of crosswind vibration, creation condition,crosswind resonance oscillation judgment and vibration harm.List a series of structure damage examples caused by wind-induced vibration.Compares that towers has advantages over stacks on the aspect of resisting wind-induced vibration;View from point of design,SW6 software has disadvantage in wind-induced vibration calculation of towers; Points out th...

关 键 词：塔器 烟囱 诱导振动 机理 共振条件 危害 对策 

分 类 号：TB53[理学—物理]