新型杠杆式准零刚度隔振系统动力学研究

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中图分类号：0328；0322 文献标志码：A 文章编号：1005-8249（2025）06-0150-08

DO1：10.19860/j.cnki.issn1005-8249.2025.06.025

Abstract：Inorder toreduce the influence offoundation excitationontheequipment，anovellever-typequasi-zero-sifnes vibrationisolatorwasproposed.Throughstaticanalysis，theexpressionsofnonlinearrestoringforceandstiffessof thesystem were derived，andthequasi-zerostiffessconditionatthestaticequilibrium position wasdetermined.Through the Lagrange equation，the dynamic equationof the system was established.Using the harmonic balance method，the absolute displacement transmissibilityexpressonwasobtained.Teinfluence mechanismofmassratio，leverageratio，stiffessratio，dampigrati anddisplacement excitationamplitudeonthedisplacementtransmisibilitycurveisanalyzed.Theresultsshowthatinthelow frequencyregion，bycomparingwiththetraditionalquasi-zero stifnessvibrationisolationsystemandthelinearvibration isolationsystem，thepeakvalueof theabsolutedisplacementtransmisibilitycurveofthenovellever-typequasi-zrosifness vibratinisolatorislower，theinitialvibrationisolationfrequencyratioissmallr，theefectivevibrationisolationrangeis wider，andthevibrationisolationefectisbeter.The novellever-typequasi-zerostiffessvibrationisolationsystemalsohas agoodvibrationisolation efectunderlargedisplacement excitation.Theresearchresultsprovideanewideafortheisolationof small amplitude low frequency or even ultra-low frequency vibration.

Key words：：nonlinear stiffess；nonlineardamping；leveragedstructure；quasi-zero-stiffnessvibration isolator；lowfrequency vibration isolation

0 引言

在现代工业环境中，精密仪器设备的应用日益广泛，而它们对周围环境的振动非常敏感。（剩余9306字）