Technical Name Smart viscous dampers with nano-particles
Project Operator National Applied Research Laboratories
Summary
Taiwan is located in the Ring of Fire, the earthquake occurred frequently. The current passive control system, only in accordance with the seismic design requirements to provide a single design damping coefficient, could not fully meet the structure in a variety of seismic performance requirements. Although the current active control system can be input plus energy, in time to change the physical parameters of the damper to accurately control the behavior of the structure. But it needs to consume huge amounts of energies; high cost does not meet the economic benefits.
The smart viscous dampers using interactions between nano-particles with their cluster effect and polymer fluid with their molecular chains, the fluid will change their viscosity with different shear rates and behave the shear thickening and thinning phenomenon, becoming shear thicking/thinning fluid. The fluid is filled in a simple damper structure to reach the characteristics of nonlinear damper, and meet the seismic demand for building and bridge structures.
Scientific Breakthrough
本發明之特點為(1)使用簡單的阻尼器構造,降低傳統阻尼器機械加工之複雜度;(2)以奈米粒子之群聚效應及其與高分子流體分子鏈間的交互作用,使流體隨不同剪切率改變而產生剪切增稠及減稀的現象,成為剪切稠變流體;(3)以剪切稠變流體之流變特性,達到適用於建築及橋梁等結構物耐震所需之非線性阻尼器特性需求。
因此,藉由調整智慧型奈米黏性阻尼器中剪切稠變液體的濃度、奈米顆粒的粒徑及含量及阻尼器環間隙狀通道或孔隙狀通之大小,可以設計流體阻尼器的阻尼係數(C)及非線性指數(α),以達到建築及橋梁等結構物之抗震需求。
Industrial Applicability
有阻尼及減震(振)需求之產業,如營建產業之建築及橋梁等公共工程、精密機具、車輛、船舶等減震要求高之技術領域應用。
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