Vibration Analysis of Collecting Electrodes by means of the Hybrid Finite Element Method

Abstract

The paper presents a hybrid finite element method of shell modeling in order to model collecting electrodes of electrostatic precipitators. The method uses the finite element method to reflect elastic features and the rigid finite element method in order to model mass features of the body. A model of dust removal systems of an electrostatic precipitator is presented. The system consists of two beams which are modeled by means of the rigid finite element method and a system of collecting shells modeled by means of the hybrid finite element method. The paper discusses both the procedure of deriving the equations of motion and the results of numerical simulations carried out in order to analyze vibrations of the whole system. Experimental verification of the model is also presented.

Study of the effect of the stiffness of the anvil beam for vibration propagation in the system of collecting electrodes

“…The earlier works of the authors [6,7] present models allowing for a simulation of vibrations of electrodes, induced by an impulse force. In the above mentioned publications much space is devoted to the validation of the models -by comparing the results of measurements and computer simulations.…”

Compensation of top horizontal displacements of a riser

“…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].…”

Modelling Plates and Shells by Means of the Rigid Finite Element Method

“…1 presents a single section of the collecting electrodes which is modelled and analysed. The authors have already dealt with the problem of modelling of this system [1][2][3][4]. Two methods, the hybrid finite element method (HFEM) [5,6] and finite element method (FEM), have been used up to now for modelling the electrodes [7].…”

“…In this paper the classical RFEM is used for modelling the whole system: the beams and the electrodes. The hybrid finite element method [3] used the RFEM for discretisation, but the energy of spring deformation of the collecting electrodes was calculated by means of the classical finite element method. A special element with 24 node values was defined and the flexible coordinates (deformations in nodes) were expressed by means of the coordinates of rigid finite elements.…”