Stiffness and damping tuning through using a piezoelectric friction damper and a layered structure

IF 3.7 3区材料科学 Q1 INSTRUMENTS & INSTRUMENTATION

Smart Materials and Structures Pub Date : 2024-09-09 DOI:10.1088/1361-665x/ad72c1

Sina Rezvani, Simon S Park

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引用次数: 0

Abstract

Vibration suppression is essential for enhancing the performance of mechanical systems, as it prevents structural damage and minimizes noise. Various methods, including passive, semi-active, and active approaches, have been developed to achieve this goal. Among these, friction dampers, primarily categorized as passive, are highly efficient in adjusting system damping and influencing energy dissipation. By modulating the normal force in the friction damper based on external force intensity, performance can be further enhanced. This study employs a piezoelectric actuator to regulate the normal force and introduces an analytical method along with finite element modeling to estimate the normal force in the friction damper. A layered structure is introduced as an additional mean to tune damping and stiffness. The performance of the semi-active piezoelectric friction damper is investigated in free and forced vibrations, including flexural and axial cyclic loads. Furthermore, the advantages of employing layered structures are investigated experimentally. Overall, the piezoelectric friction damper demonstrates effective energy dissipation during macroslip events. Nevertheless, in case of microslip, increasing the actuator voltage results in reduced damping and a marginal rise in stiffness.

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利用压电摩擦阻尼器和分层结构调节刚度和阻尼

振动抑制对于提高机械系统的性能至关重要，因为它可以防止结构损坏并将噪音降至最低。为实现这一目标，人们开发了各种方法，包括被动、半主动和主动方法。其中，摩擦阻尼器主要被归类为被动式，在调节系统阻尼和影响能量耗散方面具有很高的效率。通过根据外力强度调节摩擦阻尼器中的法向力，可以进一步提高性能。本研究采用压电致动器来调节法向力，并引入了一种分析方法和有限元建模来估算摩擦阻尼器中的法向力。此外，还引入了分层结构作为调节阻尼和刚度的额外手段。研究了半主动压电摩擦阻尼器在自由振动和强迫振动（包括挠曲和轴向循环载荷）中的性能。此外，还通过实验研究了采用分层结构的优势。总体而言，压电摩擦阻尼器在发生大滑动时能有效消散能量。不过，在微滑动情况下，增加致动器电压会导致阻尼减小，刚度略有上升。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Smart Materials and Structures 工程技术-材料科学：综合

CiteScore

7.50

自引率

12.20%

发文量

317

审稿时长

3 months

期刊介绍： Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.