基于实船航行试验的舰船总振动阻尼识别方法
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摘要
针对当前缺少来自于实船试验的总振动阻尼数据的现状,研究一种基于实船航行振动试验数据进行总振动阻尼研究的测点布置和识别计算方法。清晰表述了"模态共振响应"和"模态相邻振动响应"的概念;分析了"模态相邻振动响应"、"模态非共振响应"和"模态共振响应"三者的比例规律,按该规律指导制定了某船航行总振动测试工况,使用该船航行总振动测试数据获得了该船的弯曲总振动阻尼数据。
Considering the absence of hull vibration damping data from prototype experiment,the method of distribution of test points and identification was studied based on the experimental data of hull general vibration.The conceptions of Resonance Response of Nature Mode and Neighboring Vibration Response of Nature Mode were introduced.The law of ratio in Neighboring Vibration Response of Nature Mode,Non-resonance Response of Nature Mode and Resonance Response of Nature Mode was analyzed.According to the law,the total vibration test conditions of a sailing ship were implemented,and the bending hull vibration damping data were obtained.
Considering the absence of hull vibration damping data from prototype experiment,the method of distribution of test points and identification was studied based on the experimental data of hull general vibration.The conceptions of Resonance Response of Nature Mode and Neighboring Vibration Response of Nature Mode were introduced.The law of ratio in Neighboring Vibration Response of Nature Mode,Non-resonance Response of Nature Mode and Resonance Response of Nature Mode was analyzed.According to the law,the total vibration test conditions of a sailing ship were implemented,and the bending hull vibration damping data were obtained.
引文
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[2]YE J M,XIONG Y.Predicting pressure fluctution on shiphulls due to intermittently cavitating propellers[J].Journalof Ship Mechanics,2005,9(6):21-29.
[3]周心桃,段宏,赵耀.螺旋桨脉动压力的分析推算[J].舰船科学技术,2005,27(1):24-27.ZHOU X T,DUAN H,ZHAO Y.Analysis and calculationof propeller-induced hull pressure[J].Ship Science andTechnology,2005,27(1):24-27.
[4]熊鹰,孙文山.螺旋桨脉动压力实船测试研究进展[J].船舶力学,2000,4(5):68-77.XIONG Y,SUN W S.A review on the researches of themeasurement of the propeller induced pulsating pressure on the full-scale ship[J].Journal of Ship Mechanics,2000,4(5):68-77.
[5]王蒙蒙,赵德有.螺旋桨诱导的船体表面力预报新方法[J].船舶力学,2006,10(4):18-24.WANG M M,ZHAO D Y.New prediction method for the vibration response of hull girder by propeller excitation[J].Journal of Ship Mechanics,2006,10(4):18-24.
[6]傅志方.振动模态分析与参数辨识[M].北京:机械工业出版社,1990.
[7]陈志坚.利用模态迭加法进行动响应分析应注意的问题[J].海军工程大学学报,2002,14(5):22-25.CHEN Z J.Several problems in solving dynamic response of structure by using modal supperposition method[J].Journal of Naval University of Engineering,2002,14(5):22-25.
[8]陈志坚.舰艇振动学[M].北京:国防工业出版社,2010.
[9]董军,邓洪州,王肇民.结构动力分析阻尼模型研究[J].世界地震工程,2000,16(4):63-69.
[10]龚君来.某艇船体结构总振动测量及动力性能评估[J].舰船科学技术,2008,30(3):60-63.GONG J L.A certain's global vibration test trial and dynamical capability evaluation,2008,30(3):60-63.
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