Research On Radiation Efficiency Of Underwater Cylindrical Shells Structure

This paper focus on modeling of the underwater cylindrical shell structure and study itsradiated noise radiation efficiency and the prediction of radiation sound pressure distribution,by radiation efficiency, getting more suitable function for practical engineering applicationsapproach. The main contents are as follows:Research of radiation efficiency of cylindrical shell structure and of the acousticradiation efficiency, first introducing the its definition and several methods calculating theacoustic radiation; Second, introducing several typical cylindrical shell structure calculationmethod of the sound radiation efficiency and their difference about air and water; Third,changing the size of the cylindrical shells and the effect of radiation efficiency; Finallygetting conclusions of method of forecasting sound pressure with radiation efficiency.Using finite element software ANSYS drawing sound pressure distribution of singlesource motivation and multiple incentive source motivation, researching on the single drivesource motivation and more exciting source motivation of cylindrical shell model; Takingadvantage of SYSNOISE software studying radiation efficiency of cylindrical shell vibration.after that we get a conclusion then compared with the theory results, calculating pressure ofcylindrical shell through computer simulation by using different radiation efficiency formulaof cylindrical shells, and improving position of accelerometer.As to shell structure of the two different model(tank section model and ends with a ballcap of cylindrical shell model),we make different experiment of sound pressure distribution.using different methods of calculating radiation efficiency, we forecast the sound pressuredistribution, Improved sound radiation efficiency calculation method is more suitablefor the cylindrical shell structure of the sound pressure prediction in practical engineering.