Article(id=1243879752839316095, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, articleNumber=null, orderNo=null, doi=10.3969/j.issn.1007-7294.2024.08.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1708444800000, receivedDateStr=2024-02-21, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1774493643244, onlineDateStr=2026-03-26, pubDate=1724083200000, pubDateStr=2024-08-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774493643244, onlineIssueDateStr=2026-03-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774493643244, creator=13701087609, updateTime=1774493643244, updator=13701087609, issue=Issue{id=1243879752042398333, tenantId=1146029695717560320, journalId=1240685776644648972, year='2024', volume='28', issue='8', pageStart='1133', pageEnd='1296', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1774493643055, creator=13701087609, updateTime=1774493947997, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1243881031133147325, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1243881031133147326, tenantId=1146029695717560320, journalId=1240685776644648972, issueId=1243879752042398333, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1287, endPage=1296, ext={EN=ArticleExt(id=1243879753158083201, articleId=1243879752839316095, tenantId=1146029695717560320, journalId=1240685776644648972, language=EN, title=Vibration characteristics of underwater flexible propulsion structures based on macro fiber composite (MFC) actuators, columnId=1241023038381158513, journalTitle=Journal of Ship Mechanics, columnName=Hydro/Structural Acoustics, runingTitle=null, highlight=null, articleAbstract=
MFC actuators, widely used in intelligent sensing/actuation, energy harvesting, underwater bionic robots and other fields, have increasingly attracted attention due to their good flexibility, large actuation force and excellent waterproof performance. In this paper, the vibration characteristics and dynamic response of underwater flexible structure driven by MFC actuators were studied. The driving force of the MFC actuators were calculated, and the additional inertia force and additional damping force of the fluid were derived according to Morrison's semi-empirical formula. Based on the Euler-Bernoulli beam theory, the assumed mode method and the second kind of Lagrange equation, a coupled nonlinear dynamic model of MFC-actuated underwater flexible structures was established. The harmonic balance method was used to convert the nonlinear damping into linear. The numerical simulation and experimental results show that the local stiffness of the flexible beam structure with the MFC actuator is increased, and the measured modal shape is basically consistent with the simulated one. Affected by the hydrodynamic force of the surrounding fluid, the first two orders resonance frequency and dynamic response of the MFC-actuated cantilever beam underwater decrease significantly. The amplitude-frequency response curve predicted by the model is in good agreement with the measured curve, which confirms the validity of the coupling dynamic model. This study provides a reference for underwater bionic propulsion devices based on smart materials.
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压电纤维(Macro Fiber Composite,MFC)致动器因其柔韧性好、致动力大、防水性能优异等特点越来越受到人们的关注,并在智能传感/致动、能量采集、水下仿生机器人等领域得到了广泛的应用。本文旨在研究MFC驱动水下柔性结构的振动特性与动力学响应。计算得到MFC致动器驱动力,根据莫里森半经验公式推导得到流体附加惯性力和附加阻尼力。基于欧拉-伯努利梁理论、假设模态法和第二类拉格朗日方程,建立MFC致动的水下柔性结构耦合非线性动力学模型,采用谐波平衡法将非线性阻尼线性化。数值仿真和实验结果表明:粘贴了MFC致动器的柔性梁结构局部刚度增大,实测模态振型与仿真模态振型基本一致;受周围流体水动力的影响,MFC致动悬臂梁水下前两阶共振频率与动态响应下降明显;模型预测的幅频响应曲线与实测曲线吻合较好,证实了所建耦合动力学模型的有效性。本研究可为基于智能材料的水下仿生推进装置提供参考。
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2.宁波大学 机械工程与力学学院,浙江 宁波 315211)])], figs=[ArticleFig(id=1243879770526695639, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.1, caption=
Underwater flexible beam structure actuated by MFC, figureFileSmall=R2ew++IBe+hFBWXqaP1dww==, figureFileBig=+4MFIav89So3RbPV/ZuTpQ==, tableContent=null), ArticleFig(id=1243879770656719067, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图1, caption=
MFC致动水下柔性梁结构, figureFileSmall=R2ew++IBe+hFBWXqaP1dww==, figureFileBig=+4MFIav89So3RbPV/ZuTpQ==, tableContent=null), ArticleFig(id=1243879770891600096, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.2, caption=
MFC actuator based on d33 mode, figureFileSmall=InyoNdQSSKffT90PVb75vg==, figureFileBig=hJ8UXl/8Wee+3s1d37Jziw==, tableContent=null), ArticleFig(id=1243879771009040612, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图2, caption=
基于d33模式的MFC致动器, figureFileSmall=InyoNdQSSKffT90PVb75vg==, figureFileBig=hJ8UXl/8Wee+3s1d37Jziw==, tableContent=null), ArticleFig(id=1243879771113898214, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.3, caption=
First two dimensionless modal shape of the cantilever beam, figureFileSmall=OlOLnExNd7JATTCVJHfFUA==, figureFileBig=lYKGGXL18QBaOv/wwCn3Wg==, tableContent=null), ArticleFig(id=1243879771185201385, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图3, caption=
悬臂梁前两阶无量纲模态振型, figureFileSmall=OlOLnExNd7JATTCVJHfFUA==, figureFileBig=lYKGGXL18QBaOv/wwCn3Wg==, tableContent=null), ArticleFig(id=1243879771277476078, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.4, caption=
Amplitude-frequency response of the end of the flexible beam in air, figureFileSmall=nhUT6MND/Bbw18FP4smKIg==, figureFileBig=ZsLe6OMAYZArwK/lf3JQWw==, tableContent=null), ArticleFig(id=1243879771365556464, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图4, caption=
柔性梁末端在空气中幅频响应, figureFileSmall=nhUT6MND/Bbw18FP4smKIg==, figureFileBig=ZsLe6OMAYZArwK/lf3JQWw==, tableContent=null), ArticleFig(id=1243879771462025459, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.5, caption=
Amplitude-frequency response of the end of a flexible underwater beam, figureFileSmall=VQXpA7lVW/dt72X2zP/7bQ==, figureFileBig=LBPqCykbdNgoN2sDDcfP4A==, tableContent=null), ArticleFig(id=1243879771562688759, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图5, caption=
水下柔性梁末端幅频响应, figureFileSmall=VQXpA7lVW/dt72X2zP/7bQ==, figureFileBig=LBPqCykbdNgoN2sDDcfP4A==, tableContent=null), ArticleFig(id=1243879771667546362, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.6, caption=
Dynamic response of the whole underwater flexible beam, figureFileSmall=CSGDp4efQ5IhR8exaEvy5g==, figureFileBig=JTp9Wb9qfadOAENapef7Sg==, tableContent=null), ArticleFig(id=1243879771776598269, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图6, caption=
水下柔性梁动力学响应, figureFileSmall=CSGDp4efQ5IhR8exaEvy5g==, figureFileBig=JTp9Wb9qfadOAENapef7Sg==, tableContent=null), ArticleFig(id=1243879771889844481, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.7, caption=
Experimental set up, figureFileSmall=XeHVN6SG/H6hQTqBY/1LBQ==, figureFileBig=WQVj91qeglDX4KL0XU5JLw==, tableContent=null), ArticleFig(id=1243879771982119172, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图7, caption=
实验装置, figureFileSmall=XeHVN6SG/H6hQTqBY/1LBQ==, figureFileBig=WQVj91qeglDX4KL0XU5JLw==, tableContent=null), ArticleFig(id=1243879772116336903, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.8, caption=
Dimensionless modal shapes, figureFileSmall=YSm5LOvDuqTE76S3iSmXaQ==, figureFileBig=NcgIMx69cR+nVI2SHFkK0g==, tableContent=null), ArticleFig(id=1243879772208611596, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图8, caption=
无量纲模态振型, figureFileSmall=YSm5LOvDuqTE76S3iSmXaQ==, figureFileBig=NcgIMx69cR+nVI2SHFkK0g==, tableContent=null), ArticleFig(id=1243879772313469199, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.9, caption=
Vibration response of underwater flexible beam in frequency sweep, figureFileSmall=8VbD0aH14jOQpV1R9zJTRA==, figureFileBig=NrzKAAYIR98TrHjS3tn79g==, tableContent=null), ArticleFig(id=1243879772409938192, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图9, caption=
水下扫频振动响应, figureFileSmall=8VbD0aH14jOQpV1R9zJTRA==, figureFileBig=NrzKAAYIR98TrHjS3tn79g==, tableContent=null), ArticleFig(id=1243879772544155926, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.10, caption=
Underwater amplitude-frequency response characteristics, figureFileSmall=prqcPe6AYHMFMOPVRodGdg==, figureFileBig=GbAqJTdmX37dzj7W4lsSBg==, tableContent=null), ArticleFig(id=1243879772644819225, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图10, caption=
水下幅频响应特性, figureFileSmall=prqcPe6AYHMFMOPVRodGdg==, figureFileBig=GbAqJTdmX37dzj7W4lsSBg==, tableContent=null), ArticleFig(id=1243879772728705308, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Fig.11, caption=
Underwater dynamic response of the flexible beam, figureFileSmall=stwkQzI3hysW9klA7NIaLA==, figureFileBig=jjcWpK1vh0U7O3PDpiY4Cg==, tableContent=null), ArticleFig(id=1243879772820979999, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=图11, caption=
水下动力学响应, figureFileSmall=stwkQzI3hysW9klA7NIaLA==, figureFileBig=jjcWpK1vh0U7O3PDpiY4Cg==, tableContent=null), ArticleFig(id=1243879772951003427, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=EN, label=Tab.1, caption=
Substrate material and MFC parameters
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 | 参数 | 符号 | 数值 |
|---|
| 基体材料 | -- | Al1106 | MFC弹性模量 | Em | 48.3 GPa |
| 基体弹性模量 | Eb | 71.2 GPa | MFC密度 | ρm | 5440 kg/m3 |
| 基体密度 | ρb | 2700 kg/m3 | MFC有效长×宽×厚 | lm×bm×hm | 56×28×0.3 mm |
| 基体长×宽×厚 | lb×bb×hb | 188×30×0.2 mm | | | |
), ArticleFig(id=1243879773068443945, tenantId=1146029695717560320, journalId=1240685776644648972, articleId=1243879752839316095, language=CN, label=表1, caption=
基体材料与MFC参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 符号 | 数值 | 参数 | 符号 | 数值 |
|---|
| 基体材料 | -- | Al1106 | MFC弹性模量 | Em | 48.3 GPa |
| 基体弹性模量 | Eb | 71.2 GPa | MFC密度 | ρm | 5440 kg/m3 |
| 基体密度 | ρb | 2700 kg/m3 | MFC有效长×宽×厚 | lm×bm×hm | 56×28×0.3 mm |
| 基体长×宽×厚 | lb×bb×hb | 188×30×0.2 mm | | | |
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