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Research Papers

Tests and Modeling of a New Vibration Isolation and Suppression Device

[+] Author and Article Information
Zhao-Dong Xu

Professor
Key Laboratory of C&PC Structures of the
Ministry of Education,
Southeast University,
Nanjing 210096, China
e-mail: zhdxu@163.com

Yeshou Xu, Chao Xu, Feihong Xu, Cheng Wang

Key Laboratory of C&PC Structures of the
Ministry of Education,
Southeast University,
Nanjing 210096, China

Qianqiu Yang

ARTS Group Co., Ltd.,
Suzhou 215000, China

1Corresponding author.

Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received January 7, 2017; final manuscript received April 28, 2017; published online August 28, 2017. Assoc. Editor: Dumitru I. Caruntu.

J. Dyn. Sys., Meas., Control 139(12), 121011 (Aug 28, 2017) (14 pages) Paper No: DS-17-1012; doi: 10.1115/1.4036948 History: Received January 07, 2017; Revised April 28, 2017

Vibration is an environmental factor with hazardous effects on the instruments' precision, structural stability, and service life in engineering fields. Many kinds of energy dissipation devices have been invented to reduce the dynamic responses of structures and instruments due to environmental excitations. In this paper, a new kind of vibration isolation and suppression device with high damping performance, fine deformation recoverability, and bearing capacity for platform structures is developed, which is designed by considering the combination of the energy dissipation mechanisms of viscoelastic material, viscous fluid, and air spring. A series of dynamic properties tests on the device are carried out under different excitation frequencies and displacement amplitudes, and a mathematical model considering the coupling effects of energy dissipation of viscoelastic material, viscous liquid, and air spring is proposed. The research results indicate that the vibration isolation and suppression device has high damping capacity, and the proposed mathematical model can well describe the mechanical properties affected by excitation frequency and displacement amplitude.

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Figures

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Fig. 1

Schematic diagram of the vibration isolation and suppression device

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Fig. 2

Properties tests of the device

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Fig. 3

Hysteresis curves under different frequencies: (a) d = 4 mm, f = 0.1, 0.5, 1, 2, 5 Hz, (b) d = 6 mm, f = 0.1, 0.5, 1, 2, 5 Hz, (c) d = 8 mm, f = 0.1, 0.5, 1, 2 Hz, (d) d = 10 mm, f = 0.1, 0.5 Hz, and (e) d = 12 mm, f = 0.1, 0.5 Hz

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Fig. 4

Hysteresis curves under different displacement amplitudes: (a) f = 0.1 Hz, d = 4, 6, 8, 10, 12 mm, (b) f = 0.5 Hz, d = 4, 6, 8, 10, 12 mm, (c) f = 1 Hz, d = 4, 6, 8 mm, (d) f = 2 Hz, d = 4, 6, 8 mm, and (e) f = 5 Hz, d = 4, 6 mm

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Fig. 5

Force–displacement hysteresis curve

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Fig. 6

Characteristic parameters changes with excitation frequency: (a) storage modulus, (b) damping ratio, (c) loss factor, (d) energy dissipation, (e) equivalent stiffness, and (f) equivalent damping

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Fig. 7

Characteristic parameters changes with displacement amplitude: (a) storage modulus, (b) damping ratio, (c) loss factor, (d) energy dissipation, (e) equivalent stiffness, and (f) equivalent damping

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Fig. 9

Stress diagram of the air spring with excitation

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Fig. 10

Hysteresis curves comparison under different displacement amplitudes (f = 0.1 Hz): (a) f = 0.1 Hz, d = 4 mm, (b) f = 0.1 Hz, d = 6 mm, (c) f = 0.1 Hz, d = 8 mm, and (d) f = 0.1 Hz, d = 10 mm

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Fig. 11

Hysteresis curves comparison under different displacement amplitudes (f = 1 Hz and 5 Hz): (a) f = 1 Hz, d = 4 mm, (b) f = 1 Hz, d = 6 mm, (c) f = 5 Hz, d = 4 mm, and (d) f = 5 Hz, d = 6 mm

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Fig. 12

Numerical and experimental results comparison of equivalent stiffness and damping with different excitation frequencies. The black solid lines represent experimental results, and the red dashed lines represent model calculate results.

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Fig. 13

Numerical and experimental results comparison of equivalent stiffness and damping with different displacement amplitudes. The black solid lines represent experimental results, and the red dashed lines represent model calculate results.

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