高层煤气工业厂房复合减振技术及其有限元分析

发布时间：2018-05-30 05:30

本文选题：模态分析 + 地震时程分析　；参考：《河南理工大学》2015年硕士论文

【摘要】：目前,在减振控制技术中调谐质量阻尼器(TMD)和粘滞流体阻尼器(VFD)可以说是较为突出实用的控制技术。然而,高层煤气工业厂房在两种阻尼器共同作用下控制效果的研究,还比较欠缺。因此,本文研究工作如下:(1)本文运用ANSYS有限元软件建立了与实际建筑结构相似的三维煤气化厂房空间模型,并进行了模态分析。(2)根据煤气厂房结构的固有特性,设计出含有钢支撑、TMD、VFD以及同时加装TMD和VFD的有限元模型;研究四种模型在天津波、迁安波等地震波作用下的动力响应;通过数值计算,对比分析了四种模型的顶层位移时程曲线、加速度时程曲线和角加速度时程曲线;研究发现TMD和VFD共同作用时,对煤气工业厂房的振动控制效果最好。(3)最后,为了验证TMD对建筑结构的实际减振效果,设计了三层钢架缩尺模型。首先,运用振动台与数据采集仪对振动试验框架依次进行扫频、施加简谐激励和随机地震波,进而得到结构的振动频率与顶层加速度时程曲线等相关数据;其次,在试验框架上加装TMD;然后,对钢结构施加同样的荷载,得到结构的顶层加速度时程曲线和TMD加速度时程曲线等相关数据;最后,对两组试验数据进行对比分析,验证了TMD对三层钢结构框架具有良好的减振控制效果。
[Abstract]:At present, tuned mass dampers (TMD) and viscous fluid dampers (VFDs) are widely used in vibration control techniques. However, the research on the control effect of high-rise gas plant under the joint action of two dampers is still lacking. Therefore, the research work of this paper is as follows: (1) in this paper, the spatial model of three-dimensional coal gasification powerhouse similar to the actual building structure is established by using ANSYS finite element software, and modal analysis is carried out on the basis of the inherent characteristics of the gas plant structure. A finite element model with steel bracing TMD and VFD is designed, the dynamic response of four models under the action of Tianjin wave and Qian'an wave is studied, and the numerical calculation is carried out. The displacement time history curve, acceleration time history curve and angular acceleration time history curve of the four models are compared and analyzed. It is found that when TMD and VFD work together, the vibration control effect of the gas industrial building is the best. In order to verify the actual damping effect of TMD on building structure, a three-story steel frame scale model is designed. First of all, the vibration test frame is scanned by vibration table and data acquisition device, and the vibration frequency and the acceleration time history curve of the top layer are obtained by applying harmonic excitation and random seismic wave. Secondly, the vibration frequency of the structure and the acceleration time history curve of the top layer are obtained. Add TMD to the test frame, then apply the same load to the steel structure to get the top acceleration time history curve and TMD acceleration time history curve of the structure. Finally, the two groups of test data are compared and analyzed. It is verified that TMD has good vibration control effect on three-story steel frame.
【学位授予单位】：河南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.1

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