Comparison of methods for vibration analysis of electrostatic precipitators

Adamiec–Wójcik, Iwona; Nowak, Andrzej; Wojciech, Stanisław

doi:10.1007/s10409-011-0415-2

Cited by 15 publications

(16 citation statements)

References 5 publications

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“…This verification and validation demonstrates some differences between the model and measurement results, but they are within the range of values accepted in engineering practice. Moreover, the results are characterised by precision comparable to the precision achieved in commercial models, yet reached at considerably smaller computational costs [11]. Computer implementation of the model, as presented in the paper, has found application in the design office of one of Poland's producers of electrostatic precipitators.…”

Section: Discussionmentioning

confidence: 85%

“…The strain energy of the element, after necessary transformations [11], can be presented in the form of: yb . In view of the designation in Fig.…”

Section: Model Of Shell Elementsmentioning

confidence: 99%

“…The model combines the finite element method (FEM) used to describe spring deformations [11] and mass and geometrical features of the collecting electrodes with the rigid finite element method (RFEM) [9], [12] used to reflect the behaviour of the beam segments of the modelled system. The remaining constructional elements, such as the joints that fasten the electrodes to the suspension beam, distance-marking bushes and riveted and screw joints, were considered in the model as concentrated masses.…”

Section: Computational Modelmentioning

confidence: 99%

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Numerical verification and experimental validation of the FEM model of collecting electrodes in a dry electrostatic precipitator

Nowak

2013

Lat. Am. j. solids struct.

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The subject of the present work is the numerical verification and experimental validation of the FEM model which would enable us to analyse the vibrations of collecting electrodes. The effectiveness of electrostatic precipitators (ESP) depends on many factors. One of these factors is the efficiency of periodic cleaning of the collecting electrodes; thus the dust is removed by inducing vibrations. These vibrations are caused by the axial impact of a hammer on an anvil beam. In the course of the impact, and afterwards, the stresses due to the impact are produced in both the rapper system and in the collecting electrode section. The paper presents a modified finite element method which can be used in simulations and to analyse the vibrations of collecting electrodes. In the verification process the calculation results obtained were compared with those from commercial software (Abaqus). The calculations and measured results were compared for validation. The comparisons were made using peak and RMS (root-mean-squared) values as well as special factors and hit rates. An acceptable compatibility of the results proves that the model can be applied in the analysis of vibrations of electrodes in design practice.

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Section: Discussionmentioning

confidence: 85%

“…The strain energy of the element, after necessary transformations [11], can be presented in the form of: yb . In view of the designation in Fig.…”

Section: Model Of Shell Elementsmentioning

confidence: 99%

Section: Computational Modelmentioning

confidence: 99%

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Numerical verification and experimental validation of the FEM model of collecting electrodes in a dry electrostatic precipitator

Nowak

2013

Lat. Am. j. solids struct.

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“…The RFEM has been successfully used for dynamic analysis of flexible systems containing beam-like links [16,17] or plates and shells [18,19]. Considerations of both bending and longitudinal flexibilities of slender links are presented in [20].…”

Section: Introductionmentioning

confidence: 99%

Compensation of top horizontal displacements of a riser

et al. 2016

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The nonlinear dynamic problem of catenary risers is solved by means of the rigid finite element method. The method enables us to model slender systems such as lines, cables and risers undergoing large base motions. The formulation allows elimination of large values of stiffness coefficients: shear, longitudinal and torsional (dependent on permissibility of the system analyzed). The analysis presented in the paper is concerned with the dynamics of a riser initially bent and undergoing heave excitation. Comparison of the results with those obtained using the finite difference and finite element methods shows good compatibility and indicates the correctness of the models obtained by means of the rigid finite element method. Numerical effectiveness of the method enables it to be applied in solving the dynamic optimization problem. The problem described is the compensation of the horizontal vibrations of the vessel or a platform by vertical displacements of the upper end of the riser. Bending moments which arise during the motion of a platform or a vessel can seriously influence and in some cases damage the structure. Thus the aim of the optimization is to ensure that the maximum bending moment at a given point does not exceed its static counterpart. The results of numerical simulations show that the systems enabling heave compensation can be used to minimize the difference between the bending moment caused by displacements of the platform or a vessel and the static moment.

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“…The Flexible Segment Model (FSM) presented in [18,19] is another similar approach. The RFEM used in this paper has been also successfully used for dynamic analysis of flexible systems containing beam-like links [20,21], plates and shells [22,23]. Figure 1 shows the analysed riser.…”

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confidence: 99%

Application of dynamic optimisation to stabilise bending moments and top tension forces in risers

Drąg

2017

Nonlinear Dyn

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The study discusses the problem of determining vertical displacements of a riser's ends, which, despite its horizontal displacements induced by waves, mitigate stresses. A spatial model of riser dynamics is presented that considers the geometric nonlinearity due to large deflections. The Rigid Finite Element Method was used for riser discretisation. Analyses are reported that enabled riser's vibration frequency determination according to the positions of its upper and lower ends. Then a dynamic optimisation task was formulated and solved. It consists of the selection of riser's vertical displacements that provide bending moments' stabilisation at its selected points, tension forces, despite the defined horizontal movements of the riser's upper end induced by waves. The calculations were performed for variable amplitudes of riser end's horizontal movements.

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Comparison of methods for vibration analysis of electrostatic precipitators

Cited by 15 publications

References 5 publications

Numerical verification and experimental validation of the FEM model of collecting electrodes in a dry electrostatic precipitator

Numerical verification and experimental validation of the FEM model of collecting electrodes in a dry electrostatic precipitator

Compensation of top horizontal displacements of a riser

Application of dynamic optimisation to stabilise bending moments and top tension forces in risers

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