I. The project has in purpose the solution of a multidisciplinary problem of electrical and mechanical engineering, where coupled problems of electromagnetic field and dynamic equilibrium are solved.
II. The difficulties regarding the numerical analysis of the trajectories are:
1) The problem of electromagnetic field solving. The adopted electromagnetic fields states are stationary or quasi‑stationary and the media can be non-linear. Finite element procedures (FEM) can not be used, because they have three great disadvantages: reconstruction of the mesh at the same time with bodies’ displacement along the trajectories (unknown), with the consequence of some errors appearance when calculating the forces; the mesh and the artificial boundaries introduce parasite forces; the stability of the trajectory can not be analyzed using FEM.
2) The equation of dynamic equilibrium is non-linear, the electromagnetic forces depending on the position of the moving body and his velocity (through the induced eddy currents).
3) The study of trajectory stability implies methods of analysis that are different from those specific to the electromagnetic field problems.
III. The directions of fundamental research had in view within the project:
1) The elaboration and development of integral and hybrid methods for solving the electromagnetic field problems within structures with moving parts and non-linear media. The mesh is not built in the air between moving parts. The motion is reflected through the change of the integral equations nuclei.
2) The methods of computation of electromagnetic forces using the results of the integral and hybrid methods. The flux of Maxwell tensor or the local forces formulae will be used. The field is continuous and derivable within the air, thus, parasite forces do not appear.
3) The methods for numerical solution of the equations of dynamic equilibrium. Using integral methods, the correction of the electromagnetic force is made without rebuilding the mesh.
4) The methods of numerical analysis of the trajectories stability.
5) Algorithms and computation programs.

Prof. dr. ing. Florea Ioan HĂNŢILĂ

Prof. dr. ing. Mihai VASILIU

Prof. dr. ing. Florin CONSTANTINESCU

Lect. dr. ing. Oana Mihaela DROSU (Postdoc Fellow)

Ing. Marius Aurel COSTEA (Ph.D. Student)

The importance and relevance of scientific content (PDF)

The project main objectives (PDF)

• ISI rated:

1. R. Ciric, F. I. Hantila, M. Maricaru, S. Marinescu, “Efficient Analysis of the Solidification of Moving Ferromagnetic Bodies With Eddy-Current Control”, IEEE Trans. on Magn. (ISI), ISSN 0018-9464, Vol. 45,  No. 3, 2009, p. 1238-1241.
2. F. I. Hantila, I. R. Ciric, A. Moraru, M. Maricaru, “Modelling eddy currents in thin shields”, COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering (ISI), ISSN:  0332-1649, vol.28, no.4, 2009, pp. 964-973.

• Conference Proceedings:

1. Ioan Florea Hantila, Iosif Nemoianu, Mihai Maricaru, Ioana Hantila, Paula Palade, “An iterative procedure for solving FEM-BEM equations”, Journal of Electrical and Electronics Engineering, ISSN 1844-6035 (categ. B+ 2009), Vol. 2, Nr. 1, 2009, pp. 52-55.
2. Iosif Nemoianu, Florea Ioan Hantila, Mihai Maricaru, Dan Rucinschi, Teodor Leuca, “A method for solving the time-periodic electromagnetic field problem in ferromagnetic shielding”, Journal of Electrical and Electronics Engineering, ISSN 1844-6035 (categ. B+ 2009), Vol. 2, Nr. 1, 2009, pp. 83-86.
3. Ioan Florea Hantila, Mihai Vasiliu, Augustin Moraru, Mihai Maricaru, “Utilizing the Polarization Method for Solving a Nonlinear Magnetic Shielding Problem”, JAPMED’6 (6th Japanese-Mediterraneean Workshop on Applied Electromagnetic Engineering for Magnetic, Superconducting and Nano Materials) Extended Abstracts Proceedings, ISBN 978-606-521-346-3, July 27-29, 2009, pp. 93-94.
4. Ioan R. Ciric, Florea I. Hantila, Augustin Moraru, Mihai Maricaru, „Performance Analysis of Multiply Connected Thin Shields”, Applied Electromagnetics (II), Proceedings of the 14th International Symposium on Applied Electromagnetics and Mechanics – ISEM 2009, Xi’an, China, September 20-24, 2009, (publicată în JSAEM Studies in Applied Electromagnetics and Mechanics, Vol. 13, ISBN 978-4-931455-14-6, ISSN 1343-2869, 2009), pp. 51-52.
5. Ioan R. Ciric, Florea I. Hantila, Mihai Maricaru, “Field Analysis for Thin Shields in the Presence of Ferromagnetic Bodies”, Proceedings of the 17th Conference on the Computation of Electromagnetic Fields, COMPUMAG 2009 (CDROM), 22-26 November, Florianópolis, Brazil, pp. 119-120.

Number of papers accepted for publication in ISI-indexed journals:

• provided at the start of the contract: 1
• reported at the end of this stage : 2
  (two published during this year)

Expected minimum performance level (PDF(in Romanian)) -from contract-

Young researchers involvement reflected in personnel costs in 2009: about 53 % (including the project director, whose age is under 35)

POLITEHNICA University of Bucharest
Electrical Engineering Department
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E-mail: mm{at}elth.pub.ro