Experimental research on vibration and shock control of the complex vibration isolation system

According to the strong line-spectrum vibration characteristics and the demand for shock resistance of the vibration isolation system for the marine power machine,this paper presents an integration control method of semiactive vibration absorber based on tunable dynamic vibration absorber and further conducts systematic design and experimental research of the control system. When shock does not occur,the control system can make vibration absorber's own natural frequency automatically follow the incentive frequency change of the system,thus realize realtime control of vibration; when shock occurs,the system may transform operating frequency to anti-shock frequency in time,thus realize control over impact. The displacement decay rate under steady-state excitation is more than90%; the decay rate of the first two peak values of displacement response could reach up to 26% and 52% respectively in the condition of basic shock excitation.