No abstract

Recently, numerical analysis of electromagnetic field can be performed on high performance PCs. However, improvement of CPU operation frequency is becoming saturate. In order to speed up the calculation, multi-core CPU system is paid attention and it has been used in high performance PC. In this paper, a parallelization using multi-threads on SMP (Symmetric Multiple Processor) for a finite element analysis using hexahedral edge element is investigated. I. INTRODUCTIONNumerical methods for the electromagnetic field analysis by the finite element method and the integral equation method are implemented in the design of electrical and electronic equipments by speeding up PC. The speed-up of PC has been achieved by improving the operation frequency of CPU so far. However, the improvement of the operation frequency of CPU has reached the limit. The parallel processing by multi-core CPU is paid attention as a method of speeding-up new PC. However, the effect of speed-up by multi-core CPU is not achieved by existing sequential processing programs. In this paper, the availability of the parallel processing is investigated by parallelization of an electromagnetic field analysis program with multi-thread on the SMP system.

Eddy current testing (ECT) using sinusoidal excitation is practical in various fields and its electromagnetic phenomena is becoming clear by using numerical analysis. On the other hand, some problems are remained in ECT technology: for example, high-sensitivity detection, testing for magnetic material, thick structure. In this paper, in order to obtain guidelines for the design of ECT probes, eddy current distribution induced by exciting coil was reconsidered. Furthermore, we tried to improve the distribution by the combination of more than one exciting coil in order to high-sensitivity detection.