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Research Papers

Identification of the Effective Control Parameter to Enhance the Progression Rate of Vibro-Impact Devices With Drift

[+] Author and Article Information
Van-Du Nguyen

Mechanical Engineering Faculty,
Thai Nguyen University of Technology,
3/2 Street, Tich Luong,
Thai Nguyen 2300, Vietnam
e-mail: vandu@tnut.edu.vn

Huu-Duc Ho

Department of Metal Cutting,
Vietnam-Korea Vocational College,
Ho Tong Thoc Street, Nghi Phu,
Vinh 460000, Nghe An Province, Vietnam
e-mail: mr.ducbk@gmail.com

The-Hung Duong

Civil Engineering Faculty,
Thai Nguyen University of Technology,
3/2 Street, Tich Luong,
Thai Nguyen 2300, Vietnam
e-mail: hungduongxd@gmail.com

Ngoc-Hung Chu

International Training Faculty,
Thai Nguyen University of Technology,
3/2 Street, Tich Luong,
Thai Nguyen 2300, Vietnam
e-mail: chungochung@tnut.edu.vn

Quoc-Huy Ngo

Mechanical Engineering Faculty,
Thai Nguyen University of Technology,
3/2 Street, Tich Luong,
Thai Nguyen 2300, Vietnam
e-mail: ngoquochuy24@gmail.com

1Corresponding author.

Contributed by the Technical Committee on Vibration and Sound of ASME for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received February 8, 2017; final manuscript received June 28, 2017; published online August 17, 2017. Assoc. Editor: Stefano Lenci.

J. Vib. Acoust 140(1), 011001 (Aug 17, 2017) (9 pages) Paper No: VIB-17-1050; doi: 10.1115/1.4037214 History: Received February 08, 2017; Revised June 28, 2017

This paper presents an experimental study to find out an effective parameter which is useful to enhance the progression rate of drifting vibro-impact systems excited by a harmonic force. It is assumed that the system performance would be better if the excitation force stays in a harmonious relationship with the natural motion of the impact mass. This hypothesis has been numerically analyzed and then experimentally verified. The phase lag between the excitation force and the motion of the impact mass is used to identify the best situation, where the system progression rate is maximal. It has been found that the highest progression rate of the system can be obtained when the phase lag is around one-eighth of the excitation period.

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Figures

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Fig. 1

Physical model of a typical vibro-impact system with drift

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Fig. 2

(a) Numerical time history of displacements, X1 and X2 where m1 = 2.5 kg, m2 = 2.88 kg, c = 50 N s/m, k1 = 2.695 kN/m, k2 = 124 kN/m, F = 19 N, μ = 0.65, G = 1 mm are applied and (b) bifurcation diagram of the progression for 10 s when varying the frequency of excitation for m1 = 2.5 kg (black solid line) and m1 = 3.5 kg (red dash-dot line)

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Fig. 3

Numerical time history of the relative displacements, X1X2 (black solid lines) and the excitation force (red dashed lines) for (a) m1 = 3.5 kg, f = 7 Hz and (b) m1 = 2.5 kg, f = 9 Hz. Parameters of m2 = 2.88 kg, c = 50 N s/m, k1 = 2.695 kN/m, k2 = 124 kN/m, F = 19 N, μ = 0.65, G = 1 mm are applied.

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Fig. 4

Schematics (a) and a photograph (b) of the experimental setup

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Fig. 5

Time history of the car (black solid line) and the base board (red dash line) displacements obtained for m1 = 2.5 kg, i0 = 1.18 A and frequencies, f of (a) 5 Hz, (b) 8 Hz, and (c) 11 Hz; subplots in the right-hand side are close-up views of the corresponding time history on the left for 1 s

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Fig. 6

Main effect plot (a) and interaction plot (b) for the progression rate, taken from experiments where inertial masses of 2.5 kg and 4.3 kg, and excitation frequencies of 5 Hz and 8 Hz were applied

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Fig. 7

Progression rate of the system with respect to (a) excitation frequencies and (b) values of inertial masses. A supplied current of 1.18 A was applied.

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Fig. 8

Progression rate respects to inertial mass and excitation frequency: (a) a surface plot and (b) a contour plot. A peak current of 1.18 A was applied.

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Fig. 9

Progression rate respects to inertial mass and excitation frequency: (a) a surface plot and (b) a contour plot. A peak current of 1.71 A was applied.

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Fig. 10

Time history of the relative displacement of the inertial mass (black dashed line) and the supplied current (red solid line) for the frequency of excitation (a) f = 5 Hz and (b) f = 11 Hz

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Fig. 11

Time difference for the frequency of excitation f = 7 Hz (a) and f = 9 Hz, the supplied current of 1.71 A and the inertial mass of 2.5 kg were applied

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