【作者】 黄福安； 赵迎九； 宋一乐； 刘晓东；

【Author】 Huang Fuan;Zhao Yingjiu;Song yile;Liu xd;Huadian Heavy Industries Co., Ltd.;Institute of civil engineering, wuhan University;

【机构】 华电重工股份有限公司； 武汉大学土木建筑工程学院；

【摘要】 风机桥架是直接空冷系统动力设备的主要支承结构。目前风机桥架的形式主要有实腹梁式、倒门型桁架式和空间桁架式三种。由于诸方面因素,风机桥架抗振设计在我国没有进行过全面深入研究,没有现成的标准规定可遵循,风机桥架的设计大多套用国外的技术。时有因风机桥架抗振设计不合理,导致风机桥架振动过大而机组不能正常运行给电厂造成较大损失的情况发生。本文针对国内燃煤电厂三种最常用风机桥架结构形式,通过有限元计算和现场试验方法,分析了它们的动力特性和动力响应,为风机桥架结构抗振设计和选型提供指导。更多还原

【Abstract】 Fan-bridge is the main supporting structure of direct air cooling system of power plant. There are three main types of solid-web-beam, reversed portal truss and space truss. Due to all aspects factors, no full in-depth research haven’t been made and no ready-made of standard provides can be followed for fan bridge anti-vibration design in China. Fan bridge design most come from abroad of technology. Unreasonable anti-vibration design of fan bridge occasionally led to excessive vibration of it and bring about larger loss to power plant. This paper chose three kinds of the most commonly used fan bridge types, by the finite element calculation and field test methods, analyzed their dynamic characteristics and dynamic response, points out the more economic and reasonable anti-vibration type of fan bridge, and provide the guidance for fan bridge design and selection.更多还原