The invention discloses a pulsating pressure applying method in ship total vibration forecast. The method comprises the following steps: acquiring the total pulsating pressure P of different measuring points, the pulsating pressure P1 of a non-cavitation propeller, the value of a phase angle theta when the total pulsating pressure P occurs, and the value of a phase angle theta 1 when the pulsating pressure P1 of the non-cavitation propeller occurs from a ship cavitation test report; calculating pulsating pressure P2 of the cavitation propeller at different measuring points and a phase angle theta 2 when the pulsating pressure P2 of the cavitation propeller occurs; the pulsating pressure P1r of the non-cavitation propeller when the rotating speed of the propeller is r and the pulsating pressure P2r of the cavitation propeller when the rotating speed of the propeller is r are calculated; and the values of P1r and P2r obtained in the step 3 are applied to the surface of the ship body, and application of the pulsating pressure in the ship total vibration forecast is completed. According to the invention, different components of the pulsating pressure are respectively applied, and a reliable and reasonable application method is provided for the accuracy of the total vibration forecast result of the ship.
本发明公开了一种船舶总振动预报中脉动压力施加方法,其特征在于,其包括以下步骤:从船舶空泡试验报告中获取不同测点的总脉动压力P、非空泡螺旋桨的脉动压力P1、总脉动压力P发生时的相位角θ和非空泡螺旋桨的脉动压力P1发生时的相位角θ1的数值;计算不同测点的空泡螺旋桨的脉动压力P2和空泡螺旋桨的脉动压力P2发生时的相位角θ2;计算螺旋桨转速为r时的非空泡螺旋桨的脉动压力P1r和螺旋桨转速为r时的空泡螺旋桨的脉动压力P2r;将步骤3得到的P1r和P2r的数值施加到船体表面,完成船舶总振动预报中脉动压力的施加。本发明按照脉动压力的不同成份进行分别施加,为船舶的总振动预报结果的准确性提供了可靠合理的施加方法。
Pulsating pressure applying method in ship total vibration forecast
船舶总振动预报中脉动压力施加方法
30.06.2023
Patent
Elektronische Ressource
Chinesisch
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