Study On Wind Vibration-control Of Ferris Wheel Structure

With the sustaining development of our country economy and rapid rise of entertainment leisure industry, Ferris wheel is becoming popular all around the country. Ferris Wheel is a special form of high-rise structure which is different from the others. As an important project, it should not only meet requirements of structural strength, stiffness and stability, but that of structural deformation and degree of body comfort in paticular as well. Passive vibration control can be used to meet both aforesaid requirements and reduce the construction cost. Performance study of various passive control technique is relatively mature and the control has been applied extensively in high-rise buildings and long-span bridges, but theoretical research on vibration control of Ferris wheel have not been founded up to date. It is inharmonious with upsurge of construction of Ferris wheel in our country and there is urgent need to study its performance. In this thesis, modes and techniques of vibration control suitable for Ferris wheel are proposed on the basis of summaring previous vibration control analysis results. Useful conclusions are obtained by analyzing Shanghai Star Ferris Wheel as example, which have theoretical values and practical guide significance.First of all, a ring-type Ferris wheel which is innovative type of Ferris wheel is proposed. Nonlinear finite element analysis model is established by using structural analytical software-SAP2000. The structure is calculated and analyzed using integrated space truss method and subspace iteration method statically and dynamically.Characteristics of natural wind need to be simulated to study wind vibration response and its control of Ferris wheel. In the thesis, wind velocity in time domain is simulated based on Davernport's Spectrum and WAWS method. Hence, wind buffeting response of Ferris wheel is calculated by time-domain analysis method using revised Newmark method. Based on statistical analysis of stochastic wind vibration response, mean value, root-mean-square value and power spectrum of key...