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Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 34 , No. 1

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[ Article ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33, No. 1, pp. 18-26
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Feb 2024
Received 19 Dec 2023 Revised 07 Jan 2024 Accepted 09 Jan 2024
DOI: https://doi.org/10.7735/ksmte.2024.33.1.18
QZS특성과 고하중 지지 성능을 갖는 진동절연장치
전석춘^a ; 김기성^a ; 신응수^a^{, *}

Vibration Isolator with Quasi-Zero Stiffness Characteristics and High Load-Carrying Capacity
Seok-Chun Jeon^a ; Kee-Sung Kim^a ; Eung-Soo Shin^a^{, *}
aDepartment of Mechanical Engineering, Chungbuk National University
Correspondence to : ^*Tel.: +82-43-261-3159 E-mail address: esshin@cbnu.ac.kr (Eung-Soo Shin).

Abstract

A vibration isolator is proposed using a simple QZS combination of the extension and compression springs. A parameter study is conducted to determine the relationship between the QZS performance and the design parameters of the spring and linkage. Notably, the QZS convergence and load-carrying capacity are significantly affected by both the spring and linkage parameters. A prototype of a QZS vibration isolator is developed and its performance is experimentally validated through the displacement transmissibility under base excitation. Notably, the QZS characteristics significantly reduced vibrations for a whole range of the excitation frequency and also suppressed vibrations around peaks by as much as 70%. The vibration isolation is expected to be further enhanced by reducing errors caused in the manufacturing process of QZS springs.


Keywords: Quasi-zero stiffness (QZS), Vibration isolation, High static load, Spring free length, Displacement transmissibility

References


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Seok-Chun Jeon

M.S. Degree in the Department of Mechanical Engineering from Chungbuk National University. His research interests include Quasi-zero Stiffness and Plastic Processing Analysis.

E-mail: paplerepom@gmail.com

Kee-Sung Kim

Ph.D. Candidate in the Department of Precision Mechanical Engineering from Chungbuk National University. His research interests include Dynamic FEA Simulation, Vibration Analysis and Quasi-zero Stiffness.

E-mail: gsk0221@chungbuk.ac.kr

Eung-Soo Shin

Professor in the Department of Mechanical Engineering, Chungbuk National University. His research interest is Dynamic Characterization of Mechanical Systems.

E-mail: esshin@chungbuk.ac.kr