Computational Mechanics, Automotive Engineering, Mechanics of Materials, Control and Systems Engineering
9
Scopus Publications
Scopus Publications
Finite Element Based Active Vibration Control of Hierarchical Honeycomb Plates Integrated with Piezoelectric Actuator Ramkumar Kandasamy, Suchert Dominique SAE Technical Papers, 2018 <div class="section abstract"><div class="htmlview paragraph">Hierarchical honeycomb (HH) structures with level of hierarchy more in the honeycomb construction (by replacing the vertices of a regular hexagonal lattice with smaller hexagons) are widely used in engineering applications mainly due to their superior mechanical behavior and lightweight high strength characteristic. At the same time, the role of hierarchy and control gain on the dynamic behavior of HH structures with surface-bonded actuator remains largely unexplored.</div><div class="htmlview paragraph">In this study, we investigated the active vibration control behavior of the HH structure with surface-bonded piezoelectric actuators. The HH plate like structures was constructed with two identical face sheets and placed HH core in-between. By using ANSYS parametric design language (APDL), the proportional-integral-derivative (PID) control algorithm was incorporated into the finite element model for performing the closed-loop control simulations. The accuracy of the present method was validated with other researchers’ results. Furthermore, different parametric cases such as the effects of control gain and level of hierarchy to the transient vibration behavior of HH plates with surface-bonded actuators were investigated.</div></div>
Finite element analysis of composite box structure containing piezoelectric actuators and sensors for active vibration control K. Ramkumar, S. Chandran, N. Ganesan SAE Technical Papers, 2009 <div class="htmlview paragraph">The dynamic behavior of laminated composite box structure containing piezoelectric actuators and sensors for active vibration control is studied by finite element method. The smart laminated composite box structure is considered as assemblages of four walls made up of orthotropic plate modeled as cantilevered and also both ends clamped configuration with surface bonded piezoelectric (PZT) patches. The study uses commercial finite element package program ANSYS 8.1, in which SOLID46 elements are used for the metal part and SOLID5 elements are used for the piezoelectric part of the structure.</div> <div class="htmlview paragraph">The feedback control system used in the present study for the active vibration control is same as Karagulle <i>et al</i>. (2004). The influence of the size, number and placements of piezoelectric actuators on vibration control is discussed in detail. The present solution is found to be in good agreement with FEM and as well as ANSYS values from previous work. The result of this study can be used to aid in choosing the size, number and placement of piezoelectric sensor/actuator pairs of smart laminated composite box structure for vibration suppression</div>
Vibration and damping studies on a hollow sandwich box column with a viscoelastic/electrorheological/magnetorheological fluid core layer by the finite element method K. RAM KUMAR, N. GANESAN International Journal of Structural Stability and Dynamics, 2008 In this paper, the vibration and damping of a hollow sandwich box column containing a viscoelastic layer (VEL) or an electrorheological (ER) or magnetorheological (MR) fluid core with a constraining layer are analyzed and a comparison of performance is made. The hollow sandwich box column comprises two skin plates and a VEL/ER/MR fluid core layer. The finite element method is used to study the vibration and damping behaviors of the column. The natural frequencies and modal loss factors are obtained by solving the complex eigenvalue problem. The modal dampings and natural frequencies of the column are calculated for various electric as well as magnetic fields and their performance is compared with that of the viscoelastic core layer for the clamped-free boundary condition. Effects of core thickness, electric voltage and magnetic field on the vibration behavior of the sandwich box column are investigated.
Finite-element buckling and vibration analysis of functionally graded box columns in thermal environments K. Ramkumar, N. Ganesan Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications, 2008 In the current paper, buckling and vibration behaviours of thin-walled box columns in a thermal environment made of functionally graded materials are investigated, using finite-element method based on classical laminated plate theory. The four node thin-plate element with five degrees of freedom is employed in the study. The box column is considered as assemblages of plates, and a continuously graded variation in composition of the ceramic and metal phases across the plate wall thickness in terms of a simple power law distribution is implemented. The effects of temperature dependent material properties on the critical buckling and the free vibration response are studied. The analysis is carried out under thermal environment for clamped—clamped boundary condition and results are presented.
