[1] Li Gang, Wang Yongwei, Zhou Xinghua, et al. Analysis on resonant shake table withnovel variable stiffness mechanism [J]. Journal of Southeast University (English Edition), 2022, 38 (3): 252-259. [doi:10.3969/j.issn.1003-7985.2022.03.006]

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Analysis on resonant shake table withnovel variable stiffness mechanism()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

38

Issue:

2022 3

Page:

252-259

Research Field:

Mathematics, Physics, Mechanics

Publishing date:

2022-09-20

Info

Title:

Analysis on resonant shake table withnovel variable stiffness mechanism

Author(s):

Li Gang¹;  2;  Wang Yongwei³;  Zhou Xinghua³;  Sun Xiao³;  Zhang Jianhai³;  Chen Chen¹

¹ College of Construction Engineering, Jilin University, Changchun 130061, China
² School of Preparatory Education, Jilin University, Changchun 130012, China
³ School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China

Keywords:

variable stiffness mechanism;  resonance;  shake table;  leaf spring-lever mechanism;  stiffness soften system

PACS:

TB534.2;TH113.1

DOI:

10.3969/j.issn.1003-7985.2022.03.006

Abstract:

To improve the efficiency and amplify the exciting force of a shake table, a novel variable stiffness mechanism(VSM)constructed by four leaf spring-lever combinations(LSLCs)was designed. Three VSMs were installed in parallel on the traditional hydraulic shake table to constitute a resonant shake table(RST). The static model of the VSM and the dynamic model of the RST were constructed by considering the large deflection of leaf springs and the geometrical nonlinearity of L-shaped levers. The variable stiffness property of LSLCs was analyzed and verified through static experiments. The simulation and vibration experiments on the dynamic properties of the RST prototype were conducted. The results show that compared with traditional shake tables, the RST consumes lower exciting force in a specified frequency bandwidth when outputting the same displacement of vibration. Under a harmonic vibrational excitation, the RST is effective for vibration enhancement using broadband frequency resonance and can save energy to some extent. The broadband resonance technology exhibits considerable potential in practical engineering applications.

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Memo

Memo:

Biographies: Li Gang(1986—), male, Ph. D. candidate; Zhou Xinghua(corresponding author), male, doctor, engineer, zhouxinghua@jlu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No.41876218, 51905210).
Citation: Li Gang, Wang Yongwei, Zhou Xinghua, et al. Analysis on resonant shake table with novel variable stiffness mechanism[J].Journal of Southeast University(English Edition), 2022, 38(3):252-259.DOI:10.3969/j.issn.1003-7985.2022.03.006.

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