3 . combined with practical engineering , the behavior discriminations between nonlinear and linear viscous dampers are compared and the effect of velocity exponent on earthquake - reduction effictiveness is studied . it ' s concluded that nonlinear viscous damper is better for structure earthquake - reduction 3 、结合实际工程，比较了非线性与线性粘滞阻尼器的性能差别及其速度指数对减震效果的影响；结果表明，采用非线性粘滞阻尼器进行结构消能减震控制更为有效。
Based on the analysis of the dynamic behavior of nanning bridge by means of spatial finite element models , the nonlinear dynamic time history method is used to conduct the sensitivity analysis of the parameters of viscous dampers ( damping constant c and damping exponent ? ) of the bridge and the laws of influence of the parameters on the seismic response thereof have been obtained 摘要在来用空间有限元模型对南宁大桥动力特性分析的基础上，采用非线性动力时程分析方法，对南宁大桥粘滞阻尼器参数（阻尼常数c 、阻尼指数? ）进行敏感性分析，得出粘滞阻尼器参数对南宁大桥地震响应的影响规律。
The vibration - reduction principle of viscous damper is to consume most portion of the input energy by viscous damping material during the earthquake and wind so as to diminish vibration response of structures and insure structures " safety , and this technique has been becoming one of the main tendency of earthquake - resistant engineering research 粘滞阻尼器的控振原理是通过粘滞阻尼来耗散输入结构的大部分振动能量，以减少结构的振动反应，保证结构在地震和风荷载作用下的安全；消能减震技术现已成为工程抗震研究的主要发展方向之一。
4 . based on energy equivalence and power equivalence method separately , the additional damping ratio formula of nonlinear viscous damper is derived and it ' s suggested power equivalence method is more suitable for nonlinear viscous damper . then the transforming equality between actual and spectra velocity of structure is derived , based on which , the additional damping ratio equation is revised 4 、分别采用能量等效方法和功率等效方法，推导了非线性粘滞阻尼器的附加阻尼比公式，指出功率等效法更适合于非线性阻尼器；推导了结构的实际速度和谱速度之间的转换公式，基于该转换公式修正了功率等效方法下的附加阻尼比计算公式。
