TY  - JOUR
AU  - Cajić, Milan
AU  - Lazarević, Mihailo
AU  - Karličić, Danilo
AU  - Sun, HongGuang
AU  - Liu, Xiaoting
PY  - 2018
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/2886
AB  - In this communication, we propose a nonlocal fractional viscoelastic model of a nanobeam resting on the fractional viscoelastic foundation and under the influence of the longitudinal magnetic field and arbitrary number of attached nanoparticles. Size effects are taken into account using the differential form of the nonlocal constitutive relation together with the fractional Kelvin-Voigt model. The governing equation for the free vibration of a nanobeam is derived, where Maxwell's equations are used in order to represent the effect of the longitudinal magnetic field. We propose an analytical solution of the problem based on the Laplace transform, Mellin-Fourier transforms, and residue theory. From the validation study, it is shown that the obtained complex roots of the characteristic equation, where the imaginary part is the damped frequency and the real part is the damping ratio, are approximated eigenvalues of the system. In the parametric study, several numerical examples are given to investigate the influence of different parameters on complex roots as well as different masses and numbers of nanoparticles on the damped vibration behavior of a nanobeam system.
PB  - Springer Wien, Wien
T2  - Acta Mechanica
T1  - Fractional-order model for the vibration of a nanobeam influenced by an axial magnetic field and attached nanoparticles
EP  - 4815
IS  - 12
SP  - 4791
VL  - 229
DO  - 10.1007/s00707-018-2263-7
ER  - 

@article{
author = "Cajić, Milan and Lazarević, Mihailo and Karličić, Danilo and Sun, HongGuang and Liu, Xiaoting",
year = "2018",
abstract = "In this communication, we propose a nonlocal fractional viscoelastic model of a nanobeam resting on the fractional viscoelastic foundation and under the influence of the longitudinal magnetic field and arbitrary number of attached nanoparticles. Size effects are taken into account using the differential form of the nonlocal constitutive relation together with the fractional Kelvin-Voigt model. The governing equation for the free vibration of a nanobeam is derived, where Maxwell's equations are used in order to represent the effect of the longitudinal magnetic field. We propose an analytical solution of the problem based on the Laplace transform, Mellin-Fourier transforms, and residue theory. From the validation study, it is shown that the obtained complex roots of the characteristic equation, where the imaginary part is the damped frequency and the real part is the damping ratio, are approximated eigenvalues of the system. In the parametric study, several numerical examples are given to investigate the influence of different parameters on complex roots as well as different masses and numbers of nanoparticles on the damped vibration behavior of a nanobeam system.",
publisher = "Springer Wien, Wien",
journal = "Acta Mechanica",
title = "Fractional-order model for the vibration of a nanobeam influenced by an axial magnetic field and attached nanoparticles",
pages = "4815-4791",
number = "12",
volume = "229",
doi = "10.1007/s00707-018-2263-7"
}

Cajić, M., Lazarević, M., Karličić, D., Sun, H.,& Liu, X.. (2018). Fractional-order model for the vibration of a nanobeam influenced by an axial magnetic field and attached nanoparticles. in Acta Mechanica
Springer Wien, Wien., 229(12), 4791-4815.
https://doi.org/10.1007/s00707-018-2263-7

Cajić M, Lazarević M, Karličić D, Sun H, Liu X. Fractional-order model for the vibration of a nanobeam influenced by an axial magnetic field and attached nanoparticles. in Acta Mechanica. 2018;229(12):4791-4815.
doi:10.1007/s00707-018-2263-7 .

Cajić, Milan, Lazarević, Mihailo, Karličić, Danilo, Sun, HongGuang, Liu, Xiaoting, "Fractional-order model for the vibration of a nanobeam influenced by an axial magnetic field and attached nanoparticles" in Acta Mechanica, 229, no. 12 (2018):4791-4815,
https://doi.org/10.1007/s00707-018-2263-7 . .

TY  - CONF
AU  - Komatina, Mirko
AU  - Liu, Xiaoting
AU  - Winter, Franz
PY  - 2003
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/331
AB  - The results of experimental investigations of the effect of coal type on the thermal balance during early stages in a dense phase of a circulating fluidized bed combustor (CFBC) are presented in this paper. The experimental investigations were performed in a laboratory-scale CFBC. Five coals with three size classes (small 0.5-0.63 mm, medium 2-3.1 mm, and large 7.1-8 mm) were tested. The electrical heating system was used to ensure that the riser has a constant temperature (850°C) before the experiments. Mean velocity was 12 m/s. Oxygen concentration was 5%. During the experiments the temperature in the dense phase in the lower part of the riser and the gas concentrations of CO and CO2 were measured continuously. On the temperature histories measured, it can be seen that after feeding the coal batch into the hot CFBC, the temperature in the dense phase decreases, after reaching a minimum value and increases back again. The experimental results were compared to each other on the basis of the maximum temperature drop after feeding the coal batch. It was concluded that the temperature drop depends slightly on coal size and mainly on coal type and its mechanical and physical structure. The temperature drop slightly increases when the particle size of the coal batch increases. The strongest influence on the temperature drop in the dense phase of the CFBC shows the volatile content of the original coal and the temperature drop is directly proportional to the volatile content.
PB  - American Society of Mechanical Engineers (ASME)
C3  - Proceedings of the International Conference on Fluidized Bed Combustion
T1  - The effect of coal type on thermal balance in a dense phase of a circulating fluidized bed combustor
EP  - 421
SP  - 417
DO  - 10.1115/FBC2003-106
ER  - 

@conference{
author = "Komatina, Mirko and Liu, Xiaoting and Winter, Franz",
year = "2003",
abstract = "The results of experimental investigations of the effect of coal type on the thermal balance during early stages in a dense phase of a circulating fluidized bed combustor (CFBC) are presented in this paper. The experimental investigations were performed in a laboratory-scale CFBC. Five coals with three size classes (small 0.5-0.63 mm, medium 2-3.1 mm, and large 7.1-8 mm) were tested. The electrical heating system was used to ensure that the riser has a constant temperature (850°C) before the experiments. Mean velocity was 12 m/s. Oxygen concentration was 5%. During the experiments the temperature in the dense phase in the lower part of the riser and the gas concentrations of CO and CO2 were measured continuously. On the temperature histories measured, it can be seen that after feeding the coal batch into the hot CFBC, the temperature in the dense phase decreases, after reaching a minimum value and increases back again. The experimental results were compared to each other on the basis of the maximum temperature drop after feeding the coal batch. It was concluded that the temperature drop depends slightly on coal size and mainly on coal type and its mechanical and physical structure. The temperature drop slightly increases when the particle size of the coal batch increases. The strongest influence on the temperature drop in the dense phase of the CFBC shows the volatile content of the original coal and the temperature drop is directly proportional to the volatile content.",
publisher = "American Society of Mechanical Engineers (ASME)",
journal = "Proceedings of the International Conference on Fluidized Bed Combustion",
title = "The effect of coal type on thermal balance in a dense phase of a circulating fluidized bed combustor",
pages = "421-417",
doi = "10.1115/FBC2003-106"
}

Komatina, M., Liu, X.,& Winter, F.. (2003). The effect of coal type on thermal balance in a dense phase of a circulating fluidized bed combustor. in Proceedings of the International Conference on Fluidized Bed Combustion
American Society of Mechanical Engineers (ASME)., 417-421.
https://doi.org/10.1115/FBC2003-106

Komatina M, Liu X, Winter F. The effect of coal type on thermal balance in a dense phase of a circulating fluidized bed combustor. in Proceedings of the International Conference on Fluidized Bed Combustion. 2003;:417-421.
doi:10.1115/FBC2003-106 .

Komatina, Mirko, Liu, Xiaoting, Winter, Franz, "The effect of coal type on thermal balance in a dense phase of a circulating fluidized bed combustor" in Proceedings of the International Conference on Fluidized Bed Combustion (2003):417-421,
https://doi.org/10.1115/FBC2003-106 . .