采用网络综合分析的最优惯容型减振器辨识方法研究

This paper is aiming to studying and proposing a systematic methodology for identifying optimum inerter-based absorbers for suppressing cable vibration, based on network synthesis theory. The inerter is defined as a two-port mechanical element with the property that the applied force is proportional to the relative acceleration between its terminals, with the constant of proportionality termed inertance. Firstly, taking stay-cables of bridges as example, a generic cable-absorber system model is established. Secondly, different performance measures are investigated and proposed to assess and quantify the damping performance of the inerter-based absorbers for different cases. Then by using the network synthesis approach, beneficial absorber layouts containing inerter, damper and spring elements are identified with their parameter values quantified. Furthermore, considering the difficulties in physical implementation for large inertance and meanwhile to reduce the number of elements to the minimum as possible while not compromising the performance gains, a simplification procedure is adopted. The study results can be used for identifying, designing and tuning the inerter-based absorber for suppressing cable vibration. In addition, the proposed approach can be applied to vibration problems of other mechanical and civil structures.