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为减少土木工程结构中的振动,设置附加黏滞阻尼器。阻尼器的设计方法经常留下悬而未解的问题:结构的固有阻尼,附加黏滞阻尼器所能达到的阻尼程度。从这些问题出发,基于动力系统状态矢量空间的表示方法,提出计算非经典及非比例阻尼方案阻尼比的方法论。根据所提出的方法论,对文献中一系列附加黏滞阻尼器系统设计方法进行分析。分析显示,很多设计方法给出了第一模式阻尼比大约为20%的类似结果。采用该方法论同时显示,在设计黏滞阻尼器系统时,较高模式的贡献一般可忽略不计;随着对附加装置个数的限定,能够获得所需的阻尼程度。
To reduce vibrations in civil engineering structures, additional viscous dampers are provided. The design of dampers often leaves unanswered questions: the inherent damping of the structure, and the degree of dampening that can be achieved with the additional viscous damper. Based on these problems, a method to calculate the damping ratio of non-classical and non-proportional damping schemes is proposed based on the representation of state space in dynamical systems. According to the proposed methodology, a series of additional viscous damper system design methods in the literature are analyzed. Analysis shows that many design methods give similar results for the first mode with a damping ratio of about 20%. Using this methodology, it has also been shown that the contributions of higher modes are generally negligible when designing a viscous damper system; as the number of additional devices is limited, the degree of damping required can be obtained.