Experimental Study On The Mechanical Property Of Twin Magneto-Rheological Dampers

Cable vibration control is an important part of cable-stayed bridge engineering technology. With the magneto-rheological damper as the core of the control components, the semi-active control is one of the most advanced control technology of the cable-stayed. The study on the mechanical properties and the mechanical model of the magneto-rheological damper is the important basic contents of the cable- magnetorheological damper control technology research. Therefore, In this paper, the mechanical properties of the magneto-rheological damper were studied. The mainly completed work as following:1. Carry out a extensively investigation on the cable-magnetorheological damper control technology. Through massive search and inspection of the relevant literature, summarized the cable vibration types, characteristics and vibration control methods and measures. Go into particulars of the magnetic damper mechanical model, of which the parameterized mechanical model classification.2. Carry out the theoretical study of the mechanical model of the magnetorheological damper. Through the analysis and comparison of the literature on the mechanism and practical application of the parameterized mechanical model of the magnetorheological damper, choose be bilinear hysteretic model as a basic model. On this basic model, proposed a translation amendment method to reflect actual translation of the force - velocity hysteresis curve of magnetorheological damper, by refering the information related to the pilot study results.3. Carry out the experimental study on the mechanical properties of magnetorheological damper. The force-velocity hysteresis curve characteristics is the core content of mechanical properties of the magnetorheological damper. Using the RD-1005-3 damper which is used commonly in the current magneto-rheological control technology, carried out a series of experiments, analysed the characteristics of hysteresis curve of force-velocity, inspected the impact on the hysteresis curve with the control voltage, frequency and amplitude. Finally, fit the hysteresis curve experimentally obtained with the amended bilinear hysteretic model.The proposed translation amendment to the bilinear hysteretic model can benefit to the processing of the similar experimental data and the formation of practical magnetorheological damper vibration control algorithm. The mechanical properties of magnetorheological damper which obtained from the experiment can provides the basic parameters to the cable - magnetorheological damper vibration control system. The work and results in this thesis have positive effects to the further reseach on cable - magnetorheological damper vibration control technology.