Energy dissipation characteristics of particle sloshing in a rotating cylinder

Dragomir, Sergiu Ciprian; Sinnott, Matthew D.; Semercigil, Eren; Turan, Ozden

doi:10.1016/j.jsv.2011.09.010

Cited by 26 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, extensive studies have been carried out in the area of ocean and naval engineering for the analysis and design of crude and gas tankers for safe cruise and operation in a harsh marine environment [6][7][8]. Past study results have demonstrated that the complex sloshing phenomenon inside a container with and without baffles of complicated geometry could be well captured in detail by using finite element (FE) or volume of fluid (VOF) based computational fluid dynamics (CFD) approach [9][10][11] and particle method [12][13][14][15]. Although powerful and versatile in the simulation of complex liquid sloshing motion, these numerical models usually…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Moving element analysis of partially filled freight trains subject to abrupt braking

Dai

Han

Ang

2019

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Highlights A new and computationally efficient model for the coupled analysis of liquid freight train-track system subject to abrupt braking is presented.  The accuracy of the present sloshing model is validated by comparison with available results in the literature.  The liquid motion tends to increase the minimum vehicle braking distance by about 10-20% depending on the cargo filling level.  The optimal braking torque required for a liquid freight train is larger than that for an equivalent solid freight train.  The liquid motion affects the dynamic wheel loads significantly during the vehicle braking.

show abstract

Section: Accepted Manuscriptmentioning

confidence: 99%

Moving element analysis of partially filled freight trains subject to abrupt braking

Dai

Han

Ang

2019

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

show abstract

“…On the other hand, when the packing density is 100%, the particles can no longer move, so the energy dissipation is also low [39]. Studies on conventionally manufactured particle dampers have shown that the optimum packing density is between 40 to 80% [39,[42][43][44]. Even though in LPBF the packing density can hardly be varied, by default the packing density is in a range between 50-60% [45] and is thus in an optimal range for particle damping.…”

Section: Packing Densitymentioning

confidence: 99%

Design of Particle Dampers for Laser Powder Bed Fusion

Ehlers

Lachmayer

2022

Applied Sciences

View full text Add to dashboard Cite

Additively manufactured particle dampers can significantly improve component damping. However, if designed incorrectly, the damping can be worsened. For the design of additively manufactured particle dampers, there are not yet sufficient design rules and models to describe the effect due to numerous design parameters. The research question answered in this paper describes how the effect of particle damping can be characterised as a function of excitation force and excitation frequency for different cavity sizes. To characterise the effect of particle damping, a 33 full factorial test plan is constructed, and the damping is determined experimentally. It is shown that the damping can be reliably evaluated with the circle-fit method. The effect of particle damping is investigated for beams made of AlSi10Mg, 1.2709 and Ti6Al4V. As a result, a positive effect of the particle damping in a frequency range from 500 to 30,000 Hz and partly up to the 9th bending mode can be proven. It is shown that, for the first bending mode, there is an optimum at approx. 2000 Hz. For the optimum, the increase of the damping for the tool steel 1.2709 to 28 and for the aluminium alloy AlSi10Mg to 18 can be proven.

show abstract

“…e lightening hole is located between the tooth surface and the shaft and is at the front end of the transmission path. Particle dampers are installed in the lightening holes to achieve energy dissipation through inelastic collisions and friction between particles and wall of the damper [11,12]. And, it can greatly improve the efficiency of vibration reduction.…”

Section: Introductionmentioning

confidence: 99%

Research on Vibration Reduction Characteristics of Continuum and Noncontinuum System on Coupling for High-Power Gear Transmission Based on Particle Damping Materials

Xiao

Wang

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

High-power gears are widely used in various engineering fields. The gear transmission system is an extremely complex elastic system, which produces complex vibration under internal and external excitation. For the vibration and noise problems caused by transmission error, a discrete element and finite coupling method based on the particle filling rate is proposed. Firstly, the gear dynamic model was established, and the particle damper was installed in the gear to reduce the vibration of the gear. Secondly, through the coupling process, the contact force and contact position between the noncontinuous medium and the continuous medium were correctly transferred to the corresponding nodes of the finite element analysis model. Then, the equivalent displacement mapping of the contact loads’ node of the gear was realized, and the transformation of the local coordinate to the global coordinate was carried out. Finally, by combining theoretical analysis with experimental verification, the influence of the filling rate of damping particles on the vibration reduction effect of the gearbox under different working conditions was studied. The 2 mm tungsten particles were selected, and the particle damper had the best damping effect when the filling rate was 88%.

show abstract

Energy dissipation characteristics of particle sloshing in a rotating cylinder

Cited by 26 publications

References 14 publications

Moving element analysis of partially filled freight trains subject to abrupt braking

Moving element analysis of partially filled freight trains subject to abrupt braking

Design of Particle Dampers for Laser Powder Bed Fusion

Research on Vibration Reduction Characteristics of Continuum and Noncontinuum System on Coupling for High-Power Gear Transmission Based on Particle Damping Materials

Contact Info

Product

Resources

About