不同阻尼体系的大跨屋盖结构风振控制研究及mtmd阻尼体系的优化-建筑与土木工程专业毕业论文.docx

厦门大学硕士学位论文 ABSTRACT
ABSTRAcT
In recent years,with the development of domestic economy and the need of social development,large span spatial structure in Our country has been rapidly developed,and the span is more and more the large-span spatial structures have the characteristics of light weight,small damping,large flexibility, low natural frequencies,they are easily influenced by the wind the action of wind load,these structures would have large deformation,severely reducing their safety order to suppress the dynamic response of these structures,it is suggested that certain control devices should be installed at the proper position of their present,studies on the vibration control of high-rise buildings under wind load have achieved fruitful results,and there are a great number of engineering
application ,there are relatively little research on the
wind-induced vibration control of large-span spatial ,it is necessary to study the wind—induced vibration control of large-span spatial structures.
In this paper,three--dimensional wind··induced vibration control is investigated by using multiple tuned mass dampers(MTMD),viscous damper and tuned mass damper(TMD).A large—span arch—supported reticulated shell structure is take as a numerical example pare the control effects by the three different damping
addition,the mass ratio,the center frequency ratio,the frequency band width and the damping ratio of the MTMD has been results are summarized as follows:
on the AR model,a MATLAB-based code is developed for putation of the large—span roof structures,and the spatial correlation of ponents of fluctuating wind speed is results show that the obtmned power spectral density function are in good agreement with the target power spectrum.
dynamic characteristics and wind-induced dynamic response of large—span arch-supported reticulated shell