| 兴波及航态对螺旋桨激振力预报的影响 |
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| 引用本文： | 鲁利,徐野,熊鹰.兴波及航态对螺旋桨激振力预报的影响[J].舰船科学技术,2020,42(3):17-20. |
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| 作者姓名： | 鲁利 徐野 熊鹰 |
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| 作者单位： | 中国人民解放军92942部队,北京 100073;海军工程大学舰船与海洋学院,湖北武汉 430033 |
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| 摘 要： | 针对船舶航行时的船体兴波及航态变化,采用RANS方法、VOF方法及船体六自由度运动方程,建立了考虑船体兴波及航态变化时螺旋桨激振力的计算方法。叠模、考虑船体兴波及考虑航态变化时螺旋桨推力、船底板压力计算结果的对比表明:考虑兴波及航态变化时,由于流速变化,螺旋桨推力平均值减小,船底板压力平均值增大;由于来流不均匀程度的变化,1倍叶频处峰值减小;考虑兴波及航态变化时,计算得到的激振力更加接近真实情况,但由于激振力在频域中较为接近,为节约计算量,计算时可不考虑船体兴波及航态变化。
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| 关 键 词： | 兴波 航态 RANS 螺旋桨 激振力 |
Research on influence of ship wake and sailing attitude to propeller excitation force |
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| LU Li,XU Ye,XIONG Ying.Research on influence of ship wake and sailing attitude to propeller excitation force[J].Ship Science and Technology,2020,42(3):17-20. |
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| Authors: | LU Li XU Ye XIONG Ying |
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| Institution: | (No.92942 Unit of PLA,Beijing 100073,China;College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China) |
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| Abstract: | Due to ship′s hull wake and sailing attitude change while sailing,RANS,VOF method and 6DOF motion equation were used;a numerical method to compute propeller excitation force considering hull wake and sailing attitude change.Comparisons of double model,considering wake and sailing attitude change showed that when considering wake and sailing attitude change,the propeller average thrust reduced and the hull bottom average pressure increased because of flow velocity change;peak at BPF reduced because of inlet flow non-uniform level change;the excitation force obtained considering wake and sailing attitude change was more close to the truth,however,the wake and sailing attitude change could be ignored to save computation cause because of the excitation forces were similar in frequency domain. |
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| Keywords: | wake sailing attitude RANS propeller excitation force |
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