A Theoretical-Experimental Approach for Elasto-Damping Parameters Estimation of Cone Inertial Crusher Mounting

Mitrev, Rosen; Savov, Simeon

doi:10.22190/fume161013006m

Cited by 3 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beside those long-term consequences, there are also immediate negative consequences of vibrations, such as reduced ergonomics reflected in compromised comfort [6], unpleasant acoustic emissions [15], etc. Consequently, many research works were dedicated to this topic, ranging from proper description of structural damping [12] to development of various approaches for active [4,11,20] and passive [9,21] suppression of structural vibrations, with special focus to emitted noise attenuation [27] and vibration control.…”

Section: Introductionmentioning

confidence: 99%

Parametric Investigation of a Rail Damper Design Based on a Lab-Scaled Model

Kuchak

Marinković

Zehn

2020

J. Vib. Eng. Technol.

View full text Add to dashboard Cite

Background Track noise is one of the main issues in the development of railway networks. It is well known that rail dampers, as a cost-effective, passive means of vibration reduction, do reduce the noise; still, neither the mechanism behind their action nor the influential parameters are well understood. Purpose The main purpose of this work is to investigate the efficiency and influential parameters of a rail damper design based on a lab-scaled model of the rail-damper system and an accurate FE model. Methods Based on experimental and numerical modal analyses and the Modal Assurance Criteria (MAC) analysis, the FE model updating technique was applied to develop a highly accurate FE model of the rail-damper system for the investigated frequency range. In a further step, the developed FE model is used in a parametric analysis to assess various damper parameters with respect to the efficiency of damping rail vibrations and, therewith, radiated noise. Results The investigation performed based on FE simulations demonstrates how different material and geometric parameters of the damper influence the mobility decay rate of rail vertical vibrations. The investigated parameters are the thickness of still and rubber layers, stiffness and damping loss factor of rubber layers, and pre-force in the bolts that press the layers together. Conclusions It is shown that the FE model updating technique was capable of producing a highly accurate FE model despite the challenging properties of the real structure and that a combination of the lab-scaled model and the FE model represents a cost-effective approach.

show abstract

Section: Introductionmentioning

confidence: 99%

Parametric Investigation of a Rail Damper Design Based on a Lab-Scaled Model

Kuchak

Marinković

Zehn

2020

J. Vib. Eng. Technol.

View full text Add to dashboard Cite

show abstract

“…Along with the widely used free or commercial computer codes for simulation of multibody systems, the dynamic models of a wide range of physical systems are formulated and studied by use of analytical [21][22][23] or numerical techniques. 24 Setting the mathematical model represents the very core of dynamic modeling of such type of systems composed of hydraulic and mechanical subsystems.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the hydraulic excavator overturning stability during performing lifting operations

Mitrev

Marinković

2019

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

This article presents a numerical study of the stability of a hydraulic excavator during performing lifting operations. A planar dynamic model is developed with six degrees of freedom, which considers the base body elastic connection with the terrain, the front digging manipulator links, and the presence of the freely suspended payload. Differential equations describing the excavator dynamic behavior are obtained by using the Lagrange formalism. Numerical experiments are carried out to study the excavator dynamic stability under different operating conditions during the motion along a vertical straight-line trajectory. It is shown that the arising inertial loads during the movement of the links along the vertical trajectory, combined with the payload swinging and the motion of the base body, decreases the excavator stability. It was found that the excavator stability during following vertical straight-line trajectory decreases considerably in the lower part of the vertical trajectory. If the stability coefficient is close to 1, the payload swinging can cause the separation of a support from the terrain; nevertheless, the excavator stability can be restored. A method for tire stiffness and damping coefficients estimation is presented. The validation of the dynamical model is performed by the use of a smallscale elastically mounted manipulator.

show abstract

“…The complexity and the degree of refinement of the developed dynamical models depend on their purpose. The dynamical models of excavators developed by different researchers are intended mainly for the following purposes: 1) control and automation applications [5÷12]; 2) design of the mechanical and hydraulic systems [2,13,14,15]; 3) study of the interaction with environment [16÷19]; 4) training simulators [20]; 5) identification of the excavator parameters [21,22,23].…”

Section: Introductionmentioning

confidence: 99%

Dynamical modelling of hydraulic excavator considered as a multibody system

2017

Teh. vjesn.

View full text Add to dashboard Cite

Original scientific paper This paper considers the development of a plane multibody mechanical model of a hydraulic excavator simultaneously containing an open kinematic chain and closed loops. The Lagrange multiplier technique is used for modelling of the constrained mechanical systems. This approach is used for working out the dynamic equations of excavator motion in the case of performing transportation and digging operations. The excavator is considered as a rigid body system and detailed governing equations of the mechanical and hydraulic systems are presented. The performed verification and a typical digging task simulation show the applicability of the model for study of the excavator motion simulation. Simulation results of the machine's response are provided. It is shown that the digging process considerably influences the mechanical and hydraulic system parameters. Such models can be used for training simulators, sizing components and system design. Keywords: hydraulic excavator; Lagrange multiplier; multibody dynamical model Dinamičko modeliranje hidrauličnog bagera kao sustava sastavljenog od više tijelaIzvorni znanstveni članak Rad se bavi razvojem mehaničkog modela hidrauličnog bagera od više tijela koji u isto vrijeme sadrži otvoreni kinematički lanac i zatvorene petlje. Za modeliranje ograničenih mehaničkih sustava primijenjena je tehnika Lagrangeova faktora. Taj se pristup primjenjuje za dobivanje dinamičkih jednadžbi kretanja bagera kod obavljanja prijenosa i operacija kopanja. Bager se smatra sustavom krutog tijela i predstavljaju se detaljne jednadžbe za uređenje mehaničkih i hidrauličnih sustava. Izvršena provjera i simulacija tipičnog kopanja pokazuju primjenjivost sustava za proučavanje simulacije kretanja bagera. Daju se simulacijski rezultati reakcije stroja. Pokazano je da postupak kopanja znatno utječe na parametre mehaničkog i hidrauličkog sustava. Takvi se modeli mogu koristiti za obučavanje simulatora, dimenzioniranje sastavnih dijelova i dizajniranje sustava. Ključne riječi: dinamički model od više tijela; hidraulični bager; Lagrangeov factor

show abstract

A Theoretical-Experimental Approach for Elasto-Damping Parameters Estimation of Cone Inertial Crusher Mounting

Cited by 3 publications

References 5 publications

Parametric Investigation of a Rail Damper Design Based on a Lab-Scaled Model

Parametric Investigation of a Rail Damper Design Based on a Lab-Scaled Model

Numerical study of the hydraulic excavator overturning stability during performing lifting operations

Dynamical modelling of hydraulic excavator considered as a multibody system

Contact Info

Product

Resources

About