http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Optimization of multiple tuned mass dampers for large-span roof structures subjected to wind loads
Zhou, Xuanyi,Lin, Yongjian,Gu, Ming Techno-Press 2015 Wind and Structures, An International Journal (WAS Vol.20 No.3
For controlling the vibration of specific building structure with large span, a practical method for the design of MTMD was developed according to the characteristics of structures subjected to wind loads. Based on the model of analyzing wind-induced response of large-span structure with MTMD, the optimization method of multiple tuned mass dampers for large-span roof structures subjected to wind loads was established, in which the applicable requirements for strength and fatigue life of TMD spring were considered. According to the method, the controlled modes and placements of TMDs in MTMD were determined through the quantitative analysis on modal contribution to the wind-induced dynamic response of structure. To explore the characteristics of MTMD, the parametric analysis on the effects of mass ratio, damping ratio, central tuning frequency ratio and frequency range of MTMD, was performed in the study. Then the parameters of MTMD were optimized through genetic algorithm and the optimized MTMD showed good dynamic characteristics. The robustness of the optimized MTMD was also investigated.
Optimization of multiple tuned mass dampers for large-span roof structures subjected to wind loads
Xuanyi Zhou,Yongjian Lin,Ming Gu 한국풍공학회 2015 Wind and Structures, An International Journal (WAS Vol.20 No.3
For controlling the vibration of specific building structure with large span, a practical method forthe design of MTMD was developed according to the characteristics of structures subjected to wind loads. Based on the model of analyzing wind-induced response of large-span structure with MTMD, theoptimization method of multiple tuned mass dampers for large-span roof structures subjected to wind loadswas established, in which the applicable requirements for strength and fatigue life of TMD spring wereconsidered. According to the method, the controlled modes and placements of TMDs in MTMD weredetermined through the quantitative analysis on modal contribution to the wind-induced dynamic responseof structure. To explore the characteristics of MTMD, the parametric analysis on the effects of mass ratio,damping ratio, central tuning frequency ratio and frequency range of MTMD, was performed in the study. Then the parameters of MTMD were optimized through genetic algorithm and the optimized MTMDshowed good dynamic characteristics. The robustness of the optimized MTMD was also investigated.
Field measurement and numerical simulation of snow deposition on an embankment in snowdrift
Wenyong Ma,Feiqiang Li,Yuanchun Sun,Jianglong Li,Xuanyi Zhou 한국풍공학회 2021 Wind and Structures, An International Journal (WAS Vol.32 No.5
Snow accumulation on the road frequently induces a big traffic problem in the cold snowy region. Accurate prediction on snow distribution is fundamental for solving drifting snow disasters on roads. The present study adopts the transient method to simulate the wind-induced snow distribution on embankment based on the mixture multiphase model and dynamic mesh technique. The simulation and field measurement are compared to confirm the applicability of the simulation. Furthermore, the process of snow accumulation is revealed. The effects of friction velocity and snow concentration on snow accumulation are analyzed to clarify its mechanism. The results show that the simulation agrees well with the field measurement in trends. Moreover, the snow accumulation on the embankment can be approximately divided into three stages with time, the snow firstly deposited on the windward side, then, accumulation occurs on the leeward side which induced by the wake vortex, finally, the snow distribution reaches an equilibrium state with the slope of approximately 7°. The friction velocity and duration have a significant influence on the snow accumulation, and the vortex scale directly affected the snow deposition range on the embankment leeward side.