Combination of shape memory alloys and piezoelectric elements for vibration damping

形状记忆合金和压电元件的组合用于减振

• 批准号: 241552621
• 负责人: Professor Dr.-Ing. Jörg Wallaschek, since 10/2014
• 金额: --
• 依托单位: Institut für Dynamik und Schwingungen (IDS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/241552621?language=en
• 关键词: Combination; shape; memory; alloys; piezoelectric

The use of piezoelectric transducers is especially suited for the damping of vibrations with high frequencies and small amplitudes. In contrast shape memory alloys especially useful for the damping of low frequencies and large amplitudes. These two types of vibration damping technologies represent ideal complementary solutions.The purpose of this project is the design of passive and semi-active systems in order to reduce vibrations using a combination of piezoelectric and shape memory elements. Thus it will be possible to cover larger frequency spectra and amplitude ranges. Therefore an ideal adaption of both components is necessary. The system design is based on analytical constitutive models for shape memory alloys as well as piezoelectric transducers, representing the hysteresis and transformation behavior.While the damping effect of shape memory alloys is caused by the hysteresis of the material, the frequency dependent dampening effects of piezoelectric transducers is achieved through wiring via passive and semi-active electrical networks.Applications for such damping systems are numerous and appear in the field of systems excited in a wide range of frequencies and amplitudes. Examples are hand-operated machine tools, engine mount systems and vehicles. In this project in particular, a seat post for a bicycle will be designed and constructed.

压电式换能器的使用特别适合于高频小幅振动的减振。相比之下，形状记忆合金特别适用于低频和大振幅的减振。这两种类型的减振技术代表了理想的互补解决方案。本项目的目的是设计被动和半主动系统，以便使用压电和形状记忆元件的组合来降低振动。因此，将有可能覆盖更大的频谱和幅度范围。因此，这两个组件的理想适应是必要的。该系统的设计基于形状记忆合金和压电换能器的解析本构模型，反映了材料的迟滞和相变行为。形状记忆合金的减振效应是由材料的迟滞引起的，而压电换能器的频率相关减振效应是通过被动和半主动网络布线实现的，这种减振系统的应用非常广泛，出现在广泛频率和幅度激励的系统领域。例如手动机床、发动机悬置系统和车辆。特别是在本项目中，将设计和建造一种自行车座椅柱。