Article(id=1228295924812808982, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228295917908980268, articleNumber=null, orderNo=null, doi=10.16385/j.cnki.issn.1004-4523.2025.03.008, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1684425600000, receivedDateStr=2023-05-19, revisedDate=1697385600000, revisedDateStr=2023-10-16, acceptedDate=null, acceptedDateStr=null, onlineDate=1770778169110, onlineDateStr=2026-02-11, pubDate=1741536000000, pubDateStr=2025-03-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770778169110, onlineIssueDateStr=2026-02-11, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770778169110, creator=13701087609, updateTime=1770778169110, updator=13701087609, issue=Issue{id=1228295917908980268, tenantId=1146029695717560320, journalId=1225147924628267009, year='2025', volume='38', issue='3', pageStart='449', pageEnd='662', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1770778167464, creator=13701087609, updateTime=1770949125482, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1229012967862235389, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228295917908980268, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1229012967862235390, tenantId=1146029695717560320, journalId=1225147924628267009, issueId=1228295917908980268, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=517, endPage=528, ext={EN=ArticleExt(id=1228295925190296361, articleId=1228295924812808982, tenantId=1146029695717560320, journalId=1225147924628267009, language=EN, title=Shimmy characteristics of dual-wheel nose landing gear considering the axial and longitudinal motions of strut, columnId=null, journalTitle=Journal of Vibration Engineering, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The axial compression of the landing gear strut can directly lead to the change of system stiffness and rotational inertia,but the effect of strut axial displacement is mostly ignored in existing models of nose landing gear shimmy. A nonlinear dynamic model of six-degree-of-freedom dual-wheel nose landing gear shimmy with axial displacement and longitudinal bending of struts is established. The bifurcation theory is applied to study the effect of introducing axial displacement on the shimmy region,and the maximum compression stroke of the buffer is combined with sliding speed,vertical load,and wheel rotational inertia,respectively. The combined parameters are analyzed by two parameter bifurcation. The fourth order Runge-Kutta method and fast Fourier transform are used to calculate the time-frequency characteristics in the stable shimmy region,and the interaction between the degrees of freedom of torsion,lateral bending,and longitudinal bending of the strut is studied. The results show that under certain conditions,considering the influence of axial displacement of the strut,the areas of torsional and lateral shimmy of the strut have a tendency to shrink. In the bistable region of double wheel nose gear shimmy,when the initial excitation is close to zero equilibrium state,the longitudinal shimmy occurs near 2 times the natural frequency of torsional vibration. When the initial excitation is far from the zero equilibrium state,longitudinal shimmy occurs near 2 times the natural frequency of lateral vibration.
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起落架支柱轴向压缩将直接导致系统刚度和转动惯量发生变化,但现有前起落架(nose landing gear,NLG)摆振模型中大多忽略支柱轴向位移的影响。建立了考虑支柱轴向位移和纵向弯曲的六自由度双轮前起落架摆振非线性动力学模型。应用分岔理论研究了支柱轴向位移对摆振区域的影响,并将缓冲器最大压缩行程分别与滑跑速度、垂向载荷和机轮转动惯量进行组合,对组合参数进行双参数分岔分析。采用四阶Runge-Kutta法和快速傅里叶变换在摆振稳定区内进行时频特性计算,研究了支柱扭转、侧向弯曲和纵向弯曲摆振自由度之间的相互作用。结果表明:在一定工况下,考虑支柱轴向位移影响后,支柱扭转摆振和侧向摆振区域均有缩小趋势。双轮前起落架摆振双稳态区域内,当初始激励接近零平衡状态时,纵向摆振发生在2倍扭转振动固有频率附近;而当初始激励远离零平衡状态时,纵向摆振发生在2倍侧向振动固有频率附近。
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Shimmy model of a dual-wheel aircraft NLG, figureFileSmall=v5BqBg7wKoTzewwVnMkXlg==, figureFileBig=a66vypXqLV0tQRYT0TO8pg==, tableContent=null), ArticleFig(id=1228312970476843789, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图1, caption=
双轮前起落架摆振模型, figureFileSmall=v5BqBg7wKoTzewwVnMkXlg==, figureFileBig=a66vypXqLV0tQRYT0TO8pg==, tableContent=null), ArticleFig(id=1228312970598478610, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.2, caption=
Schematic of the tire-ground interface, figureFileSmall=U2eEJCbu6PF0rXZHZwcdYA==, figureFileBig=TLH4DwjvAW6gHR9kWAfpMw==, tableContent=null), ArticleFig(id=1228312970682364695, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图2, caption=
轮胎触地面示意图, figureFileSmall=U2eEJCbu6PF0rXZHZwcdYA==, figureFileBig=TLH4DwjvAW6gHR9kWAfpMw==, tableContent=null), ArticleFig(id=1228312970770445083, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.3, caption=
Bautin bifurcation for l2<0, figureFileSmall=39rAkTKWx1RbhFTAWwDQ9A==, figureFileBig=iI7wJvnZCgd/1YLeVPJwcQ==, tableContent=null), ArticleFig(id=1228312970879496989, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图3, caption=
l2<0时的Bautin分岔, figureFileSmall=39rAkTKWx1RbhFTAWwDQ9A==, figureFileBig=iI7wJvnZCgd/1YLeVPJwcQ==, tableContent=null), ArticleFig(id=1228312971013714721, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.4, caption=
Brief flow chart of bifurcation analysis of shimmy, figureFileSmall=vT0QIVmfB5qzP+YbiUAQMA==, figureFileBig=CQQ0S/AkqpwqEE0aRZbikA==, tableContent=null), ArticleFig(id=1228312971143738148, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图4, caption=
摆振分岔分析的基本流程, figureFileSmall=vT0QIVmfB5qzP+YbiUAQMA==, figureFileBig=CQQ0S/AkqpwqEE0aRZbikA==, tableContent=null), ArticleFig(id=1228312971303121702, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.5, caption=
Comparison of bifurcation diagrams of dynamic models, figureFileSmall=w1bUcR1Kwgydqr1WbTZ6TQ==, figureFileBig=ocUvKcs3QFW7MbVraTD0Cw==, tableContent=null), ArticleFig(id=1228312971424756522, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图5, caption=
动力学模型分岔图比较, figureFileSmall=w1bUcR1Kwgydqr1WbTZ6TQ==, figureFileBig=ocUvKcs3QFW7MbVraTD0Cw==, tableContent=null), ArticleFig(id=1228312971521225514, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.6, caption=
Effect of torsional stiffness on shimmy, figureFileSmall=WT9hpohQkGMATYs2RUUaQQ==, figureFileBig=luuQt98tcSOabhxDepHZvg==, tableContent=null), ArticleFig(id=1228312971605111596, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图6, caption=
扭转刚度对摆振的影响, figureFileSmall=WT9hpohQkGMATYs2RUUaQQ==, figureFileBig=luuQt98tcSOabhxDepHZvg==, tableContent=null), ArticleFig(id=1228312971705774895, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.7, caption=
Effect of lateral and longitudinal moment of inertia on shimmy, figureFileSmall=NLbV7ZsVRAvOu76KSgpGSA==, figureFileBig=tnxaimH7Pz9UCXxKYDVzmg==, tableContent=null), ArticleFig(id=1228312971802243891, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图7, caption=
侧向和纵向转动惯量对摆振的影响, figureFileSmall=NLbV7ZsVRAvOu76KSgpGSA==, figureFileBig=tnxaimH7Pz9UCXxKYDVzmg==, tableContent=null), ArticleFig(id=1228312971907101493, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.8, caption=
Bifurcation structure diagram in V-Um plain, figureFileSmall=s6lHs0O7PTqDspTItCvQQQ==, figureFileBig=CTq4WNlL5952lWIHFnySkw==, tableContent=null), ArticleFig(id=1228312972028736314, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图8, caption=
V和Um的双参数分岔图, figureFileSmall=s6lHs0O7PTqDspTItCvQQQ==, figureFileBig=CTq4WNlL5952lWIHFnySkw==, tableContent=null), ArticleFig(id=1228312972112622395, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.9, caption=
Phase diagram and time histories of each region in the V-Um bifurcation diagram, figureFileSmall=tiIOCBM7Lb6kO2oHlrlFdg==, figureFileBig=iLETLpCDVqv0eK1jUtf7mw==, tableContent=null), ArticleFig(id=1228312972225868605, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图9, caption=
V-Um分岔图中各区域的相平面及时域图, figureFileSmall=tiIOCBM7Lb6kO2oHlrlFdg==, figureFileBig=iLETLpCDVqv0eK1jUtf7mw==, tableContent=null), ArticleFig(id=1228312973593211714, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.10, caption=
Two-parameter bifurcation structure diagram in FZ-Um plain, figureFileSmall=x81tgQJXuEibIAOztJpz4g==, figureFileBig=FS6xVQrBaKvg80MXEhuasw==, tableContent=null), ArticleFig(id=1228312973706457922, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图10, caption=
FZ-Um的双参数分岔图, figureFileSmall=x81tgQJXuEibIAOztJpz4g==, figureFileBig=FS6xVQrBaKvg80MXEhuasw==, tableContent=null), ArticleFig(id=1228312973823898437, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.11, caption=
The phase plane in the region ①~④, figureFileSmall=VXiXc2mdMHMKiulR0GMnEg==, figureFileBig=cTF50mwHy09T5Y8mZ4yHaQ==, tableContent=null), ArticleFig(id=1228312973937144650, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图11, caption=
①~④区域内相平面, figureFileSmall=VXiXc2mdMHMKiulR0GMnEg==, figureFileBig=cTF50mwHy09T5Y8mZ4yHaQ==, tableContent=null), ArticleFig(id=1228312974016836428, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.12, caption=
Two-parameter bifurcation structure diagram in I-Um plain, figureFileSmall=zP2lX80/AD2w6BfXuh8itA==, figureFileBig=nHftHTFVcCGI/JT3kpSBGw==, tableContent=null), ArticleFig(id=1228312974125888337, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图12, caption=
I-Um的双参数分岔图, figureFileSmall=zP2lX80/AD2w6BfXuh8itA==, figureFileBig=nHftHTFVcCGI/JT3kpSBGw==, tableContent=null), ArticleFig(id=1228312974218163027, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.13, caption=
Phase diagram at A2 and B2 with time, figureFileSmall=7UpBbAtCGDH+a1/35HQdvg==, figureFileBig=5KfjtWZVuEgcSzCid7G1MA==, tableContent=null), ArticleFig(id=1228312974314632018, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图13, caption=
A2、B2处随时间变化的相图, figureFileSmall=7UpBbAtCGDH+a1/35HQdvg==, figureFileBig=5KfjtWZVuEgcSzCid7G1MA==, tableContent=null), ArticleFig(id=1228312974406906709, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.14, caption=
Two-parameter bifurcation diagram of NLG shimmy, figureFileSmall=nxIPgfjqqSqb0KQlSiHchw==, figureFileBig=AHQDDsXyew9gNvquipu96A==, tableContent=null), ArticleFig(id=1228312974511764312, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图14, caption=
前起落架摆振双参数分岔图, figureFileSmall=nxIPgfjqqSqb0KQlSiHchw==, figureFileBig=AHQDDsXyew9gNvquipu96A==, tableContent=null), ArticleFig(id=1228312974608233307, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.15, caption=
Time histories and frequency spectra of the bistable region(initial excitation one), figureFileSmall=/cUZ2LAvuBUN3tKQ7AU0Ow==, figureFileBig=Azp5HNcu6N/DsM53hN4eHw==, tableContent=null), ArticleFig(id=1228312974717285214, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图15, caption=
双稳态(初始激励一)区域内的时间历程和频谱图, figureFileSmall=/cUZ2LAvuBUN3tKQ7AU0Ow==, figureFileBig=Azp5HNcu6N/DsM53hN4eHw==, tableContent=null), ArticleFig(id=1228312974838920032, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Fig.16, caption=
Time histories and frequency spectra of the bistable region(initial excitation two), figureFileSmall=Ikd3MY6ucS4XP7Jf3AXafA==, figureFileBig=juiYGK0/3U1u29wopsVeKA==, tableContent=null), ArticleFig(id=1228312974927000419, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=图16, caption=
双稳态(初始激励二)区域内的时间历程和频谱图, figureFileSmall=Ikd3MY6ucS4XP7Jf3AXafA==, figureFileBig=juiYGK0/3U1u29wopsVeKA==, tableContent=null), ArticleFig(id=1228312975019275107, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=EN, label=Tab.1, caption=
Parameters and their values of the model
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 几何结构参数 | 机械稳定距e/m | 0.12 |
| 前倾角ϕ/rad | 0.157 1 |
| 起落架安装高度l0/m | 2.5 |
| 支柱侧向刚度系数Kδ/(N·m·rad-1) | 6.1×106 |
| 支柱纵向刚度系数Kβ/(N·m·rad-1) | 3×107 |
| 支柱扭转阻尼系数Cθ/(N·m·s·rad-1) | 300 |
| 支柱侧向阻尼系数Cδ/(N·m·s·rad-1) | 300 |
| 支柱纵向阻尼系数Cβ/(N·m·s·rad-1) | 300 |
| 支柱绕S轴的转动惯量Iθ/(kg·m2) | 100 |
| 轮胎参数 | 轮胎松弛长度σ/m | 0.3 |
| 轮胎触地线半长h/m | 0.1 |
| 机轮半径R/m | 0.362 |
| 两轮间距D/m | 0.2 |
| 极限侧偏角αm/rad | 0.174 5 |
| 轮胎扭转回正系数Kα/(m·rad-1) | 1.0 |
| 轮胎侧向回正系数Kλ/(m·rad-1) | 0.002 |
| 轮胎扭转阻尼系数Cλ/(N·m2·rad-1) | 270 |
| 轮胎垂向刚度Kv/(N·m-1) | 4×106 |
| 缓冲器参数 | 预应力F0/N | 10 000 |
| 多变指数修正系数ca | 1 |
| 多变指数n | 1.18 |
| 平方阻尼系数d1/(N·s2·m-2) | 7.5×105 |
| 延拓参数 | 缓冲器最大压缩行程Um/m | 0 ~ 1.5 |
| 机轮转动惯量I/(kg·m2) | 0 ~ 1.4 |
| 垂向载荷FZ/kN | 0 ~ 1 200 |
| 滑跑速度V/(m·s-1) | 0 ~ 300 |
), ArticleFig(id=1228312975115744101, tenantId=1146029695717560320, journalId=1225147924628267009, articleId=1228295924812808982, language=CN, label=表1, caption=
模型参数及其取值
, figureFileSmall=null, figureFileBig=null, tableContent=
| 参数 | 数值 |
|---|
| 几何结构参数 | 机械稳定距e/m | 0.12 |
| 前倾角ϕ/rad | 0.157 1 |
| 起落架安装高度l0/m | 2.5 |
| 支柱侧向刚度系数Kδ/(N·m·rad-1) | 6.1×106 |
| 支柱纵向刚度系数Kβ/(N·m·rad-1) | 3×107 |
| 支柱扭转阻尼系数Cθ/(N·m·s·rad-1) | 300 |
| 支柱侧向阻尼系数Cδ/(N·m·s·rad-1) | 300 |
| 支柱纵向阻尼系数Cβ/(N·m·s·rad-1) | 300 |
| 支柱绕S轴的转动惯量Iθ/(kg·m2) | 100 |
| 轮胎参数 | 轮胎松弛长度σ/m | 0.3 |
| 轮胎触地线半长h/m | 0.1 |
| 机轮半径R/m | 0.362 |
| 两轮间距D/m | 0.2 |
| 极限侧偏角αm/rad | 0.174 5 |
| 轮胎扭转回正系数Kα/(m·rad-1) | 1.0 |
| 轮胎侧向回正系数Kλ/(m·rad-1) | 0.002 |
| 轮胎扭转阻尼系数Cλ/(N·m2·rad-1) | 270 |
| 轮胎垂向刚度Kv/(N·m-1) | 4×106 |
| 缓冲器参数 | 预应力F0/N | 10 000 |
| 多变指数修正系数ca | 1 |
| 多变指数n | 1.18 |
| 平方阻尼系数d1/(N·s2·m-2) | 7.5×105 |
| 延拓参数 | 缓冲器最大压缩行程Um/m | 0 ~ 1.5 |
| 机轮转动惯量I/(kg·m2) | 0 ~ 1.4 |
| 垂向载荷FZ/kN | 0 ~ 1 200 |
| 滑跑速度V/(m·s-1) | 0 ~ 300 |
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