Impact of Particle Damping Parameters on Surface Roughness of Bored Surface

Sathishkumar, B.; Mohanasundaram, KM; Kumar, M. Senthil

doi:10.1007/s13369-014-1209-1

Cited by 17 publications

(5 citation statements)

References 7 publications

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“…Subballast consists of particles smaller than those of the ballast. Te energy dissipated by sliding friction is higher in smaller particles, which also exhibit a higher number of contacts [57]. Tis will result in better damping, and thus, a more consistent pattern of displacement is noticed for the subballast where the displacement is smaller than the ballast.…”

Section: Displacement Of Ballast and Subballast For Diferent Subballa...mentioning

confidence: 94%

Response Analysis of a Ballasted Rail Track Constructed on Soft Soil by 3D Modeling

Hoque

Aziz

Mallick

et al. 2023

Advances in Civil Engineering

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The displacement, stress, and strain distributions of railway embankments on the soft deltaic deposit of the Ganges–Brahmaputra floodplain are investigated. A numerical model developed in general-purpose finite element software is used to simulate the design train load on a deltaic deposit for a 100 km/hr rail speed. The numerical analysis analogy is grounded in the spring model, where a beam under the unit load is modeled based on the Winkler foundation model concept. In the moving load simulation on soil, the static point load relating to the axle load is assigned in the form of a dynamic multiplier, determined using auxiliary software. The calculated shear force in terms of the influence line is applied as a dynamic multiplier. The numerical results demonstrate that under a dynamic train load, the loose ballast undergoes larger and more erratic displacement than the subballast. Comparative analysis between varying subballast stiffnesses shows that stiffer subballast yields smaller displacements. Moreover, a high subballast stiffness can counterbalance the potential of forming permanent deformation by generating lower strains. However, a stiffer subballast does not play a prominent role in reducing the displacement of ballast or vertical stresses. The subgrade is found to carry the maximum load, withstanding the maximum vertical stress; thus, the importance of using an improved subgrade with higher stiffness is also observed. A greater subgrade stiffness improves its load-carrying capacity but fails to reduce the tension responsible for the lateral spreading of the soft subsoil. To reduce the high radial strain, the effects of improving the stiffness properties of two immediately adjacent soft soil layers are numerically investigated. The improvement of subsoil alone is effective in reducing the radial strain, whereas the improvement of both subgrade and subsoil produces further reductions. The critical train speed generating the maximum displacement is identified as 120 km/hr, and the dynamic velocity amplitude decreases with depth. Finally, an allowable limit of rail embankment settlement on a soft deltaic deposit is observed.

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Section: Displacement Of Ballast and Subballast For Diferent Subballa...mentioning

confidence: 94%

Response Analysis of a Ballasted Rail Track Constructed on Soft Soil by 3D Modeling

Hoque

Aziz

Mallick

et al. 2023

Advances in Civil Engineering

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“… Shaking table tests of a three‐storey steel frame with a buffered particle damper and a five‐storey steel frame with a particle TMD were carried out by Lu et al Several design parameters, such as the auxiliary mass ratio and gap clearance, were analyzed. Sathishkumar et al filled a boring bar with different metal particles and investigated the effects of certain particle parameters, such as particle size, density, and hardness, on the surface roughness of machined surface.…”

Section: Experimental Study Of Particle Dampingmentioning

confidence: 99%

“…It is a quite effective way to restrain the vibration during the process of metal cutting by this kind of impact damper. Moreover, Sathishkumar et al employed particle damping to control the vibration of stationary boring bars, which are used for conducting boring operations on rotating parts, by filling them with various metal particles.…”

Section: Application Of Particle Damping Technologymentioning

confidence: 99%

“…Regarding the various design parameters of particle dampers, such as particle type, particle placement, and packing ratio, a series of tests were carried out by Hollkamp et al [8] Shaking table tests of a three-storey steel frame with a buffered particle damper [153,154] and a five-storey steel frame with a particle TMD [74] were carried out by Lu et al Several design parameters, such as the auxiliary mass ratio and gap clearance, were analyzed. Sathishkumar et al [155] filled a boring bar with different metal particles and investigated the effects of certain particle parameters, such as particle size, density, and hardness, on the surface roughness of machined surface. In summary, through experimental study, the limitations of theoretical research owing to the nonlinear characteristics of particle damping have been overcome to a great extent.…”

mentioning

confidence: 99%

“…It is a quite effective way to restrain the vibration during the process of metal cutting by this kind of impact damper. Moreover, Sathishkumar et al [155] employed particle damping to control the vibration of stationary boring bars, which are used for conducting boring operations on rotating parts, by filling them with various metal particles.It has also been demonstrated that it is feasible for particle damping to reduce the vibration and noise of automobile. [163] For example, Hu et al [174] first studied acoustic pressure reduction at a target point inside an enclosed cavity using particle dampers.…”

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confidence: 99%

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Particle impact dampers: Past, present, and future

Wang

Masri

Lü

2017

Struct Control Health Monit

201

105

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Particle damping, an effective passive vibration control technology, is developing dramatically at the present stage, especially in the aerospace and machinery fields. The aim of this paper is to provide an overview of particle damping technology, beginning with its basic concept, developmental history, and research status all over the world. Furthermore, various interpretations of the underlying damping mechanism are introduced and discussed in detail. The theoretical analysis and numerical simulation, together with their pros and cons are systematically expounded, in which a discrete element method of simulating a multi-degree-of-freedom structure with a particle damper system is illustrated. Moreover, on the basis of previous studies, a simplified method to analyze the complicated nonlinear particle damping is proposed, in which all particles are modeled as a single mass, thereby simplifying its use by practicing engineers. In order to broaden the applicability of particle dampers, it is necessary to implement the coupled algorithm of finite element method and discrete element method. In addition, the characteristics of experimental studies on particle damping are also summarized. Finally, the application of particle damping technology in the aerospace field, machinery field, lifeline engineering, and civil engineering is reviewed at length. As a new trend in structural vibration control, the application of particle damping in civil engineering is just at the beginning. The advantages and potential applications are demonstrated, whereas the difficulties and deficiencies in the present studies are also discussed. The paper concludes by suggesting future developments involving semi-active approaches that can enhance the effectiveness of particle dampers when used in conjunction with structures subjected to nonstationary excitation, such as earthquakes and similar nonstationary random excitations. KEYWORDS discrete element method, impact damping, nonlinear energy sink, particle damping, passive control, semiactive control | INTRODUCTIONParticle damping technology is a form of an auxiliary-mass type vibration damper, wherein multiple metal, tungsten carbide, ceramic or other types of small particles are placed within the cavities of the vibrating structure, or the enclosures attached to the vibrating structure in order to mitigate the response of the primary structure. [1,2] As the primary structure vibrates, kinetic energy is significantly absorbed through the combined effects of particle-to-particle and particle-to-wall inelastic collisions and frictional losses, producing considerable damping to the primary structure. [3][4][5][6] Particle damping technology has been widely Received: 23 February 2017 Revised: used due to its conceptual simplicity, moderate cost, good durability, and temperature insensitivity. Provided that the operating temperature is below the particles' metal melting point, it could maintain normal operation. Furthermore, material such as tungsten powder can withstand the high temp...

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Einsatz additiv gefertigter Partikeldämpfer – eine Übersicht

Ehlers

Lachmayer

2020

Konstruktion Für Die Additive Fertigung 2019

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Impact of Particle Damping Parameters on Surface Roughness of Bored Surface

Cited by 17 publications

References 7 publications

Response Analysis of a Ballasted Rail Track Constructed on Soft Soil by 3D Modeling

Response Analysis of a Ballasted Rail Track Constructed on Soft Soil by 3D Modeling

Particle impact dampers: Past, present, and future

Einsatz additiv gefertigter Partikeldämpfer – eine Übersicht

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