EXPERIMENTAL STUDY ON THE ONE DEGREE-OF-FREEDOM  DUFFING OSCILLATOR WITH IMPACT

La Ngọc Tuấn; Nguyễn Văn Dự

doi:10.34238/tnu-jst.2019.10.1749

EXPERIMENTAL STUDY ON THE ONE DEGREE-OF-FREEDOM DUFFING OSCILLATOR WITH IMPACT

About this article

Received: 26/06/19 Published: 12/07/19

Authors

1. La Ngoc Tuan, Trường Đại học Sư phạm Kỹ thuật Vinh
2. Nguyen Van Du , Trường Đại học Kỹ thuật Công nghiệp, Đại học Thái Nguyên

Abstract

This paper presents results on realizing experimental devices and evaluating the resonant area of an one degree-of-freedom Duffing oscillator with impacts. The actuator was developed from a mini shaker, using electro-mechanical interaction to convert electrical signal to mechanical vibration. The resonant areas were determined by Bode plots which depict relation between oscillation amplitude, phase angle and excitation frequencies. The resonant position as well as the electro-mechanical interaction were evaluated experimentally. The results showed that, impacts significantly influenced on the resonant frequency. The supplied current appeared to reduce considerably when resonance occured. The results would be promising for further studies on vibration with impact problems.

Keywords

Nonlinear dynamics; Duffing oscillator; 1-DOF; vibro-impact; resonance

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DOI: https://doi.org/10.34238/tnu-jst.2019.10.1749

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