火电厂房结构煤斗基于DTMD及MTMD调谐策略的减震控制分析

发布时间：2018-01-27 10:14

本文关键词： 双调谐质量阻尼器多重调谐质量阻尼器火电厂房煤斗减震　出处：《建筑结构》2016年S1期 　论文类型：期刊论文

【摘要】：TMD的减振效果对调谐频率的波动十分敏感,而在实际工程中其频率很难达调谐到最优,这导致其有效性明显降低。有鉴于此,本文立足于双调谐质量阻尼器(DMTD)及多重调谐质量阻尼器(MTMD)研究理论,通过SAP2000软件建立结构整体模型,并采用集中质量的方式模拟煤斗重量,研究了将DTMD、2重TMD、5重TMD调谐策略应用于某大型火电厂房煤斗,由于DTMD在Y向的作用退化为TMD,主要分析其单向(X向)动力反应的减震效果。结果表明,DTMD对结构X向的减震效果优于2重TMD及5重TMD;2重TMD及5重TMD对于结构X向及Y向位移响应均具有一定的减震效果,对于煤斗层及顶层也存在失效情况;罕遇地震作用下,DTMD的残余变形要小于2重TMD和5重TMD。
[Abstract]:The damping effect of TMD is very sensitive to the fluctuation of tuning frequency, but it is difficult to tune to the optimal frequency in practical engineering, which results in its effectiveness obviously reduced. Based on the theory of double tuned mass dampers (DMTD) and multiple tuned mass dampers (MTMDD), a structural model is established by SAP2000 software. The weight of coal hopper is simulated by means of lumped mass, and the tuning strategy of DTMD2 heavy TMD5 TMD is applied to the coal hopper of a large thermal power plant. Since the action of DTMD in Y direction degenerates to TMD, the vibration absorption effect of the unidirectional (X) dynamic response of DTMD is mainly analyzed. The results show that. The effect of DTMD on X direction of structure is better than that of double TMD and 5 TMD. 2) TMD and 5 TMD have a certain damping effect to the displacement response of the structure in X direction and Y direction, and there are also failure conditions for the coal hopper layer and the top floor. The residual deformation of TMD under rare earthquake is less than 2 TMD and 5 TMD.
【作者单位】：北京市建筑设计研究院有限公司;
【分类号】：TU352.1
【正文快照】： 0引言火力发电厂由于生产工艺的需要,厂房多为多层,个别为单层。厂房平面及竖向布置不规则,存在如扭转等诸多抗震不利因素。按照工艺布置的要求对每台锅炉一般都要配备5~6个煤斗,由于煤斗的质量巨大,作用位置较高,因此对整个主厂房结构产生的水平地震作用也会很大,特别是在高

【相似文献】