Marine Noise Transfer Path Analysis And Software Design

Marine mechanical noise is the main source of ship radiated noise caused by,it through the machine feet,vibration isolation device,piping to the housing transfer,and ultimately by the shell radiated into water,seriously affected the whole ship acoustic stealth performance.Noise sources of ship vibration transmission path analysis method of common traditional transfer path analysis method,fast transfer path analysis method,operational transfer path analysis method,these methods are single-level analysis,and the analysis method is relatively small overall transfer path analysis method,aiming at this situation,study the ship muti-level transfer path analysis Due to the traditional transfer path analysis method is from the positive incentive,will encounter many problems,this paper according to the actual situation of from the reverse incentive to analysis of ship vibration and noise transfer path problem.In "A Vibration And Noise Transfer Path Testing System" developed under the background,this paper mainly studies the transfer characteristic of the vibration noise of ships.The ship itself is a very complex noise source,decided the ship vibration and noise is a multistage transmission,and is not a single level of transfer.The single level operational transfer path analysis method to expand the analysis method for the multistage transmission path.To the cabin model and hull as experimental carrier,installed inside the exciter as the excitation source,vibration test.In the verification of the multistage transfer path analysis method validity and correctness of the premise,the of the overall transfer path analysis.The results show that the ship multilevel transfer path analysis method is effective,can quickly and accurately on ship vibration and noise transfer path to make a judgment,the application prospect broad.In this system we compiled the software of data acquisition and transmission path analysis software.Through long time experimental data acquisition,show that the data acquisition software can complete the data acquisition,the batch experimental data processing show that the transfer path analysis of each module of the software is effective and able to complete the function requirements of the system.In cabin model as the experimental platform internal installation exciter as internal excitation source,from the cabin model 3 to 5m long put high power source as the external incentive,constructed by the method of reciprocity measurement system.Through a large number of processing experimental data.It turns out that the vibration and noise of the marine pass reciprocity,the energy transfer characteristics of the concept,results indicate that the marine radiated noise transfer path is reversible.