Study On Vibration Reduction Of High-Rise Petrochemical Equipment Implemented With The Tuned Mass Damper

To this issue that heavy wind-induced vibration of high-rise petrochemical equipment of some petrochemical enterprise in Yueyang City, Hunan Province, the author plans to use the tuned mass damper (TMD), which is a more and more mature vibration control technology for high-rise structure, to reduce equipment vibration in order to ensure safety operation and prolong service life. So this paper has finished following tasks:(1) It is theoretically studied that how three parameters of TMD influence control effectiveness of steady dynamic response of main structure under harmonic excitation. Dynamic magnification factor (DMF) has been deduced under different conditions. DMF is regarded as the objective function to seek for optimal matching parameters of TMD using programmed Matlab genetic algorithm. Optimal matching parameters are verified by programmed MapleSim block diagram.(2) By experiment, the changing tendencies of the natural frequency, the damping ratio and the top maximum displacement have been studied after the simulator is implemented with TMD under the existing experimental condition. It is verified that whether TMD is feasible for wind-induced vibration control of high-rise petrochemical equipment.(3) Discuss in detail main characteristics of fluctuating wind load and deduce strictly the basic theory. On this basis, fluctuating wind loads are simulated by Matlab using harmonic superposition method for high-rise petrochemical equipment. The main statistical characteristics of simulation results are verified.(4) The high-rise petrochemical equipment is properly simplified, and simplified model is researched by Newmark method under simulated fluctuating wind loads. The results show that wind-induced vibration control is very necessary for high-rise petrochemical equipment.(5) TMD wind-induced vibration control is numerically simulated and optimal matching parameters are sought for. Wind-induced vibration control effect has been calculated under optimal matching parameters for high-rise petrochemical equipment.(6) Considering the actual limited space of installation and running of TMD generally, the author gives top vibration energy reduction rate contour and TMD maximum relative displacement contour under different mass ratios. Therefore, the problem of limited space can be solved by coordinating these two contours.