A new loading method of propeller-induced pressure fluctuation in prediction of ship hull global vibration
In order to accurately analyze the influence of propeller-induced pressure on ship hull vibration,a new load-ing method was proposed.Firstly,based on the vibration guidelines of the Classification Society,the components of the pres-sure fluctuations are introduced.According to the Holden distribution and the ship model cavitation test report,the pulsating pressure caused by cavitation is obtained.A new pulsating pressure method based on the combination of cavitation pressure and non-cavitation pressure is proposed in a wide range of vibration frequency.A three-dimensional finite element model of a container ship is established.The vibration response caused by first-order pulsation pressure was analyzed by using the conventional method and the new pulsation method respectively.The difference between the conventional loading method and the new method is compared.The results show that the proposed method is consistent with the conventional method in vibration prediction trend,but more reasonable in numerical value.
global vibrationpressure fluctuationcavitationresponse
万方数据
维普
