Lightweight heavy-duty CNC horizontal lathe based on particle damping materials

Particle damping has the promising potential for attenuating unwanted vibrations in harsh environments especially under high temperatures where conventional damping materials would not be functional. Nevertheless, a limitation of simple particle damper (PD) configuration is that the damping effect is insignificant if the local displacement/acceleration is low. In this research, we investigate the performance of a tuned mass particle damper (TMPD) in which the particle damping mechanism is integrated into a tuned mass damper (TMD) configuration. The essential idea is to combine the respective advantages of these two damping concepts and in particular to utilize the tuned mass damper configuration as a motion magnifier to amplify the energy dissipation capability of particle damper when the local displacement/acceleration of the host structure is low. We formulate a first-principle-based dynamic model of the integrated system and analyze the particle motion by using the discrete element method (DEM). We perform systematic parametric studies to elucidate the damping effect and energy dissipation mechanism of a TMPD. We demonstrate that a TMPD can provide significant vibration suppression capability, essentially outperforming conventional particle damper.

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Vibration Reduction of Water Source Heat Pump Units Based on Particle Damping Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.532-533.220 ◽

2012 ◽

Vol 532-533 ◽

pp. 220-223

Author(s):

Zi Qiang Sun ◽

Chang Zheng Chen ◽

Huang Liu

Keyword(s):

Heat Pump ◽

Vibration Isolation ◽

Low Cost ◽

Vibration Reduction ◽

Low Frequency ◽

Water Source ◽

Isolation System ◽

Vibration Isolators ◽

Particle Damping ◽

Damping Materials

Spring vibration isolators and rubber damping vibration isolators are often used in active isolation engineering of water source heat pump units. The method is inefficient in shock and low frequency vibration isolation. Because the stiffness of equipments reduces with the isolation system the vibration severity itself becomes too big for working safely. Particle damping materials can absorb vibration energy to reduce vibration. The paper testifies that successful application of particle damping materials in vibration reduction of water source heat pump units is a practical simple way with low cost.

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Particle Damping for Passive Vibration Suppression: Numerical Modeling With Experimental Verification

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2003/vib-48535 ◽

2003 ◽

Cited By ~ 2

Author(s):

Zhiwei Xu ◽

Michael Yu Wang ◽

Tianning Chen

Keyword(s):

Vibration Suppression ◽

Research Work ◽

Numerical Procedure ◽

Elastic Beam ◽

Experimental Tests ◽

Physical Models ◽

Highly Nonlinear ◽

Particle Damping ◽

Frictional Forces ◽

Damping Materials

As a simple and passive means, particle damping provides vibration suppression with granular particles embedded within their containing holes in a vibrating structure. Unlike in traditional damping materials, mechanisms of energy dissipation of particle damping are primarily related to friction and impact phenomena which are highly nonlinear. In the research work reported in the paper we investigate an elastic beam structure with drilled longitudinal holes filled with damping particles. Our focus is on the form of damping due to shear friction induced by strain gradient along the length of the structure. We present physical models to take into account of the shear frictional forces between particle layers and impacts of the particles with the containing holes. A numerical procedure is presented to predict the damping effect. Experimental tests of the beam for various different damping treatments are also conducted. Model predictions are validated by experimental results.

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Research on the Vibration Attenuation of Heavy-Duty Machine Tool Based on Non-Obstructive Particle Damping (NOPD)

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.138-139.799 ◽

2011 ◽

Vol 138-139 ◽

pp. 799-803

Author(s):

Wang Qiang Xiao ◽

Dong Ping Duan ◽

He Chuan Bian ◽

Wei Li ◽

Le Deng

Keyword(s):

Machine Tool ◽

Cost Reduction ◽

Emission Reduction ◽

Element Model ◽

Milling Machine ◽

Heavy Duty ◽

Damping Effect ◽

Vibration Attenuation ◽

Particle Damping ◽

The Finite Element Model

In this paper, the possibility of applying non-obstructive particle damping (NOPD) into the vibration attenuation for heavy-duty machine tool was analyzed and the experimental study on the characteristics of damping vibration attenuation was then carried out. First, the finite-element model for heavy planer type milling machine was built and then the stress state excited by the cutting force in the presence of the holes for filling particles located in the stand column was calculated. Secondly, based on the experiment, the acceleration time-domain waveform and the frequency response function (FRF) between NOPD application and the traditional solid cast-iron column of the planer type milling machine were obtained. Finally it is indicated that NOPD can effectively reduce the amplitude of vibration of heave-duty machine tool and has a good damping effect. Meanwhile, it has some additional effects, such as cost reduction, energy conservation and emission reduction.

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Vibration reduction design of extension housing for printed circuit board based on particle damping materials

Applied Acoustics ◽

10.1016/j.apacoust.2020.107434 ◽

2020 ◽

Vol 168 ◽

pp. 107434

Author(s):

Wangqiang Xiao ◽

Shaowei Yu ◽

Lijie Liu ◽

Feng Zhang

Keyword(s):

Printed Circuit Board ◽

Vibration Reduction ◽

Circuit Board ◽

Printed Circuit ◽

Particle Damping ◽

Damping Materials

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An Experimental Study of Particle Damping for Beams and Plates

Journal of Vibration and Acoustics ◽

10.1115/1.1640354 ◽

2004 ◽

Vol 126 (1) ◽

pp. 141-148 ◽

Cited By ~ 40

Author(s):

Zhiwei Xu ◽

Michael Yu Wang ◽

Tianning Chen

Keyword(s):

Unique Feature ◽

Vibration Suppression ◽

Free Vibrations ◽

Particle Sizes ◽

Highly Nonlinear ◽

Particle Damping ◽

Impact Phenomena ◽

Damping Materials ◽

Carbide Particles ◽

Linear Decay

This paper describes an experimental investigation of a particle damping method for a beam and a plate. Tungsten carbide particles are embedded within longitudinal (and latitudinal) holes drilled in the structure, as a simple and passive means for vibration suppression. Unlike in traditional damping materials, mechanisms of energy dissipation of particle damping are highly nonlinear and primarily related to friction and impact phenomena. Experiments are conducted with a number of arrangements of the packed particles including different particle sizes and volumetric packing ratios. The results show that the particle damping is remarkably effective and that strong attenuations are achieved within a broad frequency range. The effects of the system parameters including particle size, packing ratio and particle material are studied by broadband and narrowband random excitations. The experimental results confirm a numerical prediction that shear friction in the longitudinal (and the latitudinal) directions is effective as the major contributing mechanism of damping in the case. Another unique feature of linear decay in free vibrations is also observed in this case of particle damping.

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