Reza TikaniIsfahan University of Technology | IUT · Department of Mechanical Engineering
Reza Tikani
Ph.D. in Mechanical Vibration
About
27
Publications
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231
Citations
Citations since 2017
Publications
Publications (27)
This paper investigates the free vibrations of functionally graded porous (FGP) plates with variable thickness and internal supports in contact with a fluid. The FGP plate is the vertical wall of a rigid tank containing fluid. Four different types of thickness changes are considered for the plate, and the modeling of the interaction between the flu...
Nowadays, energy harvesting by piezoelectric materials has become one of the important fields for researchers. In this research, energy harvesting from double cantilever beams is investigated by an approximate analytical solution based on the multiple scales method (MMS). First, the technique to solve the equations of motion by the method of multip...
This paper experimentally studied the energy harvesting from the longitudinal and transverse motions of sea waves using a waterproof piezoelectric wave energy harvester (WPWEH). Because of sealing and specific design type of the WPWEH, the piezoelectric cantilever beam was entirely placed inside the water to increase the harvested electrical power....
In the present study, the energy harvesting from nonlinear vibrations of an L-shaped beam with the use of piezoelectric patches is evaluated. The beam was assumed to be a Euler–Bernoulli type in which the effects of rotational inertia and shear forces are neglected. Also, the effective mass of the beam is assumed to be at the end of the beam. The a...
The present study aimed to analyze the stable states and the snap-through forces of square and rectangular bi-stable composite laminates with [03/903] stacking sequence and large to very large displacements and medium to large rotations. Also, the effect of lateral length and aspect ratio of these laminates on their stable states and snap-through f...
Conventional harvester systems usually have linear behavior. One of the great matters in these systems is that energy is harvested in a low frequency bandwidth. In this study, double cantilever beams connected at the end through a linear spring are used for energy harvesting. The bimorph piezoelectric patches are attached to the top beam by using d...
In this article, bistable laminates are statically and dynamically studied under the existence of nonlinear magnetic force. The bistable laminates with magnetic forces are considered as a nonlinear system for vibration energy harvesting. First, a semi-analytical model was established based on the energy approach for the bistable plate together with...
In this paper, energy harvesting from a simply supported beam using piezoelectric materials has been performed. Two different models for the moving objects were considered. First, the passing object was modeled as a concentrated mass with some amount of unbalances. The coupled governing equations of the beam, the piezoelectric patch, and the moving...
Piezoelectric patches are widely used on a micro scale energy harvesting due to their simplicity and high flexibility. In this study a fluidic oscillator was used to effectively convert the kinetic energy of a fluid into the strain energy of the piezoelectric structure. The relationship between the input velocity and the frequency of fluid fluctuat...
The coupling between polarization and strain gradients is called flexoelectricity. This phenomenon exists in all dielectrics with any symmetry. In this paper, energy harvesting from a Timoshenko beam is studied by considering the flexoelectric and strain gradient effects. General governing equations and related boundary conditions are derived using...
Nowadays, environmental energy resources, especially mechanical vibrations, have attracted the attention of researchers to provide energy for low-power electronic circuits. A common method for environmental mechanical energy harvesting involves using piezoelectric materials. In this study, a spiral multimode piezoelectric energy harvester was desig...
In this work, energy harvesting from an Euler Bernoulli beam with travelling harmonic load
is studied. Harvesting has been executed by attaching a thin piezoelectric patch directly on
the beam. A theoretical formulation was presented for the problem of energy harvesting from
moving of a harmonic force on a simply supported beam. To validate the out...
In this paper, static and dynamic behavior of bi-stable composite laminates with (Formula presented.) stacking sequence and piezoelectric layers is studied. The governing equations of system were obtained using Rayleigh–Ritz method and Hamilton’s principle. In order to improve the accuracy of results, a set of higher-order shape functions were empl...
Harvesting energy by piezoelectric materials is nowadays an efficient way for powering low-power
electronic devices. Required energy for sensors, used in condition and health monitoring of bridges and
other civil infrastructures, can be examples of the energy harvesters. This study aimed to improve the
piezoelectric-based energy harvesting on civil...
In this article, energy harvesting from a beam with traveling mass is studied. Harvesting was carried out by attaching a thin piezoelectric patch directly on the beam. A theoretical formulation was presented for the problem of energy harvesting from moving mass on a simply supported beam. To validate the results, an experimental setup was designed...
The journal foil bearings are used in applications where a light load and a high speed are applied. Based on the internal structure of the foil bearing, various generations of these bearings have been developed. In order to determine the load capacity of the bearing, Reynolds equation and the energy equation are simultaneously solved to have a ther...
In this paper, an analytical approach was used to formulate for gathering energy from ambient sources of vibrations. The apparatus consists of a cantilevered beam harvester with a piezoelectric patch. A coupled electromechanical modal model based on Euler–Bernoulli theory is used. The governing equations were extracted using Hamilton’s principle an...
In this patent, the bridge and it's moving vehicle has been simulated and by attaching a piezoelectric patch on it, the amount of energy harvesting can be measured. Also, three kinds of moving vehicle (simple mass, harmonic mass, and continuous) mass has been produced. By this product, we can measure the beam response and voltage induced in the pie...
Cocoa butter analog was prepared from camel hump fat and tristearin by enzymatic interesterification in supercritical carbon dioxide (SC-CO2) using immobilized Thermomyces lanuginosus lipase (Lipozyme TL IM) as a biocatalyst. Optimal process conditions were determined using neural networks and genetic algorithm optimization. Response surfaces metho...
Hydraulic engine mounts are generally used in aerospace and automotive applications for the purpose of cabin noise and vibration reduction. By careful selection of hydraulic mount design parameters, at a certain frequency, namely the notch frequency, the dynamic stiffness will be smaller than the static stiffness and cabin vibration and noise reduc...
Hydraulic engine mounts are applied to the automotive applications to isolate the chassis from the high frequency noise and vibration generated by the engine as well as to limit the engine shake motions resulting at low frequencies. In this paper, a new hydraulic engine mount with a controllable inertia track profile is proposed and its dynamic beh...
Hydraulic engine mounts are generally applied to the aerospace and automotive applications for the purpose of cabin noise and vibration reduction. By careful selection of mount design parameters, at a certain frequency called the notch frequency, the dynamic stiffness will be smaller than the static stiffness. Following the notch frequency there wi...
Increasing current vehicle development trends for small, light, front wheel drive vehicles with low idle speeds have been forced automotive industries to use hydraulic engine mounts for further improvement in vibration, noise and harshness (NVH) performance of the vehicles. However, with the development of modern vehicle designs such as hybrid vehi...
Hydraulic engine mounts are generally applied to the aerospace and the automotive applications for the purpose of cabin noise and vibration reduction. By careful selection of hydraulic mount design parameters, at a certain frequency, namely the notch frequency, the dynamic stiffness will be smaller than the static stiffness and cabin vibration and...
Passive hydraulic engine mounts are broadly applied to the aerospace applications to isolate the cabin from the engine noise and vibration. In aerospace applications involving turbofan engines, the notch frequency of each hydraulic engine mount is adjusted to either engine low speed shaft imbalance excitation frequency (N1) or to engine high speed...
Projects
Projects (2)
In the past few decades, the discussion of energy harvesting has been one of the major issues in the study of various sciences. Among the new methods for the energy supply of low-energy electrical systems used in the sea is the use of mechanical energy of waves. In this method, using oscillation and dynamic strain in a piezoelectric energy converter, the mechanical energy generated by the sea waves is converted into electricity. However, the advantage of this method is the need not to replace the battery charge of the system as well as to store the energy in the battery and capacitor. For this purpose, the electric power consumption of piezoelectric waves energy converter was investigated experimentally when passing surface waves inside the water channel. At first, the piezoelectric energy converter was designed and constructed. Also, a harmonic plunger type wavemaker was used to generate regular surface waves inside the water channel of the laboratory. In this research, the effect of wave parameters was investigated, such as, angular frequency of oscillations, amplitude, wavelength and depth of water, parameters of the structure of the converter, including the damped natural frequency of the structure, changed by its orientation and its added mass, type of direction oriented and tip displacement of the structure and finally, the electrical circuit load resistor Series with converter circuit, on the RMS of electrical power density of the energy converter is calculated.
