剪切型阻尼U型柔性铰链设计与实验分析

发布时间：2018-01-30 06:39

本文关键词： 柔性铰链黏弹性阻尼 GHM模型动态力学分析　出处：《振动.测试与诊断》2017年05期 　论文类型：期刊论文

【摘要】：根据柔性铰链的无阻尼结构特点,并利用黏弹性阻尼材料的剪切损耗特性,提出一种剪切型阻尼U型柔性铰链的结构模型,并结合GHM(Goulla-Hughes-MacTavish,简称GHM)黏弹性理论模型建立带阻尼铰链动力学方程。该铰链通过提高外加黏弹性阻尼层材料的剪切效应,达到增强结构阻尼目的。为了测试剪切型阻尼结构对该U型铰链的振动抑制效果,对其进行自由振动信号测试和动态力学分析(dynamic mechanical analysis,简称DMA)实验。结果显示,该阻尼结构能使铰链结构在120~150Hz的共振频段内因振幅增大,阻尼层剪切效应加剧,出现明显的阻尼损耗峰值,有效增强了铰链的结构阻尼。
[Abstract]:According to the characteristics of undamped structure of flexure hinge and the shear loss of viscoelastic damping material, a structural model of shear-type damping U-shaped flexure hinge is proposed. And combined with GHM(Goulla-Hughes-MacTavish. The viscoelastic model of GHM is used to establish the dynamic equation of damped hinge, which improves the shear effect of viscoelastic damping layer material. In order to test the vibration suppression effect of the shear damping structure on the U-shaped hinge, the purpose of this paper is to enhance the damping of the structure. The free vibration signal test and dynamic mechanical analysis were carried out. The damping structure can increase the amplitude of the hinge structure in the resonance frequency range of 120 ~ 150Hz, the shear effect of the damping layer is aggravated, and there is an obvious peak value of damping loss, which effectively enhances the structural damping of the hinge.
【作者单位】：华南理工大学广东省精密装备与制造技术重点实验室;华南理工大学机械与汽车工程学院;
【基金】：广东省科技攻关资助项目(2014B090917001,2015B020239001) 广州市科技计划资助项目(2015090330001) 广东省自然科学基金资助项目2016A030313481
【分类号】：TH122
【正文快照】： 引言柔性机构经常被用于精密超精密工程领域,例如精密定位系统[1],高精度光纤对接[2],微型夹具[3]和微机电系统[4]等。柔性铰链是柔性机构的主要变形部位,在柔性机构中扮演重要角色。与传统机构链接铰链相比,柔性铰链具有零冲击、零摩擦、免润滑等特点,因此能获得精准的位移输

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