大变形下轴向力对船舶推进轴系弯曲固有频率影响

邹冬林1,2,荀振宇3,花纯利1,2,塔 娜1,2,饶柱石1,2

振动与冲击 ›› 2015, Vol. 34 ›› Issue (14) : 206-210.

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (14) : 206-210.
论文

大变形下轴向力对船舶推进轴系弯曲固有频率影响

  • 邹冬林1,2,荀振宇3,花纯利1,2,塔 娜1,2,饶柱石1,2
作者信息 +

Effectofaxialforceonnaturalfrequencyoflateralvibrationofmarinepropulsionshafting

  • ZOUDong-lin1,2,XUNZhen-yu3,HUAChun-li1,2,TANa1,2,RAOZhu-shi1,2
Author information +
文章历史 +

摘要

用牛顿法建立大变形下受轴向力的船舶推进轴系非线性动力学模型,并用多尺度方法求解。研究大变形
下轴向力对船舶推进轴系弯曲振动固有频率影响。结果表明,线性下轴向静推力使轴系弯曲振动固有频率降低;考虑大
变形时在几何非线性作用下轴向静推力使轴系弯曲振动固有频率增加;振动幅值较大时几何非线性效应占主导地位,使
两种效应综合后的固有频率仍有增加。该非线性效应对高阶固有频率影响更大。分析结果对船舶推进轴系设计有指导
借鉴意义。

Abstract

AnonlinearrotordynamicmodelunderaxilthrustwasestablishedbyNewtonianformuladuetolargedeformationanditwassolvedbythemethodofmultiplescales.Theeffectsofaxialforceonnaturalfrequencyoflateralvibrationofamarinepropulsionshaftingwerestudied.Theresearchshowsthatlateralnaturalfrequenciesarereducedduetoaxialforcewithoutconsiderationoflargedeformationandareincreasedduetothegeometricalnonlinear.Whenthevibrationamplitudeisbig,thegeometricalnonlinearisdominant,leadingtotheincreaseofthenaturalfrequency.The
resultalsoshowsthatthegeometricalnonlineareffectsaremuchgreaterwithragardtothehighfrequencies.Theseanalysescanbereferenceandguidancetothedesignofmarinepropulsionshafting.

关键词

轴向力 / 推进轴系 / 多尺度法 / 几何非线性 / 固有频率

Key words

axialforce / propulsionshafting / multiplescales / geometricalnonlinear / naturalfrequency

引用本文

导出引用
邹冬林1,2,荀振宇3,花纯利1,2,塔 娜1,2,饶柱石1,2. 大变形下轴向力对船舶推进轴系弯曲固有频率影响[J]. 振动与冲击, 2015, 34(14): 206-210
ZOUDong-lin1,2,XUNZhen-yu3,HUAChun-li1,2,TANa1,2,RAOZhu-shi1,2. Effectofaxialforceonnaturalfrequencyoflateralvibrationofmarinepropulsionshafting[J]. Journal of Vibration and Shock, 2015, 34(14): 206-210

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