Research On The Impact-resistance Properties Of Semi-active Control Floating Raft

The application of semi-active control on the floating-raft obviously improve its vibration isolation properties. The impact resistance properties will also disturb the normal work of the vessels and equipments carried, so it is important to research the impact resistance properties of semi-active control floating raft system. The impact resistance properties of semi-active control floating raft is studied in this paper through simulation and test, the main contents is as follows.(1) Introduce the impact load and its simplification forms in domestic and local national standards and relative research, discuss the valuation of vessel impact resistant properties.(2) Establish the models of single-layer vibration isolation system, double-layer vibration isolation system and floating raft system, discuss and choose an impact response time-domain computing method of floating raft system.(3) Establish the impact resistant model of semi-active control floating raft, study the acceleration response of floating raft under different impact impulse duration.(4) Test the impact resistant properties of semi-active control floating raft on the floating raft test system, built the impact excitation system. Exerts impacts to the floating raft system and measure the acceleration responses of foundation and unites, study the impact resistant properties under different damping states respectively. The results show that the acceleration response of unites upper in the ‘on’ state decay more quickly than ‘off’ state, peak value of acceleration response of unites is small than the foundation, average decay period of acceleration response of unites is slightly longer than foundation. The impact resistant properties of semi-active floating raft reflected from experiment and simulation are consistent. The ‘on’ and ‘off’ states will affect the impact resistant properties of semi-active floating raft.