Research On Ship Intelligent Base System Based On Magneto-rheological Dampers

Performance of vibration reduction is an important index that evaluates holisticperformance of ship．Recently, the study on this area has become the hotspot．At the presenttime，most of the vibration absorber components in our country are passive model，forexample，rubber damper, steel wire damper, etc． But for ship equipments，their workingfrequencies are changing，it is necessary to apply controllable vibration absorber in theequipments vibration reduction for get the best effect. this paper presents a new controllablemounting system，which is based on the idea of using MR dampers and steel rope springs inparallel，and the characteristics of this base system were investigated by model tests．Theresults show that the damping capacity of MR base system is good in various frequencybands，especially in low-frequency．The damping effect is obviously better than traditionalbase system．The main contents of the current paper are as follows：(1)Based on the idea of using the MR dampers and steel rope springs in parallel andtaking the ship engine as protected object，an base system model is designed．The basement oftraditional ship is altered reasonably according to the present shape characteristics of MRdamper in our country.(2)The simulation analysis on the control algorithm of MR base system were carriedout．In order to validate the vibration control system is effective.(3)Vibration model test were designed for the MR base system. At last，PID method wasadopted to control the vibration response. According to the test results, the effect of the MRdamper base system in the control of structural vibration can be validated.(4) The application of MR base on ship vibration absorber system is studied. By thesimulation analysis in a typical ship cabin under the harmonic excitation force, the rule of MRintelligent base transfer rate and vibration level difference with damper number and currentchanges were got. Finally， through the optimization analysis of structure form, the basestructure form with best control effect were got.