A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Xiong, Ranhua; Chen, Bin; Mao, Yan; Li, Bo; Jing, Qi-Feng

doi:10.2528/pier12072201

Cited by 21 publications

(13 citation statements)

References 34 publications

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“…The Multi-Resolution Time-Domain (MRTD) technique was first published in 1996 by Krumpholz and Katehi [1,2], and has been developed rapidly as an efficient numerical algorithm in the timedomain like the long established Finite Difference Time-Domain (FDTD) technique [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] and other time-domain methods [18][19][20]. As the dispersion of the MRTD scheme compared to the conventional FDTD scheme shows an excellent capability to approximate the exact solution with negligible error for sampling rates approaching the Nyquist limit, it becomes possible that larger targets can be simulated without sacrificing accuracy.…”

Section: Introductionmentioning

confidence: 99%

Parallel Implementation and Application of the MRTD With an Efficient CFS-PML

Liu¹,

Chen²,

Zhang³

2013

PIER

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Abstract-In this paper, we describe two parallel MRTD algorithms. Both algorithms are proved to be feasible by comparing the result of the serial MRTD method, the efficiency of them are also compared in order to evaluate a better strategy. Moreover, a novel implementation of "complex frequency-shifted" perfect matched layer (CFS-PML) with auxiliary differential equation (ADE) is presented for the MRTD method. The implementation is easier to obtain and more memory saving when treating more generalized media, and numerical results demonstrate that the CFS-PML with ADE is more absorptive than the popularly used APML. Furthermore, using one of the parallel algorithms and the CFS-PML, the characteristic of the field crosssection distribution of the electromagnetic pulse (EMP) propagation in vaulted tunnel is studied.

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Section: Introductionmentioning

confidence: 99%

Parallel Implementation and Application of the MRTD With an Efficient CFS-PML

Liu¹,

Chen²,

Zhang³

2013

PIER

View full text Add to dashboard Cite

show abstract

“…The Multi-Resolution Time-Domain (MRTD) technique was first published in 1996 by Krumpholz and Katehi [1], and has been developed rapidly as an efficient numerical algorithm in the timedomain like the long established Finite Difference Time-Domain (FDTD) technique [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and other time-domain methods [17][18][19]. With highly-linear dispersion performance, the MRTD scheme implies that a low sampling rate in space can still provide for a relatively small phase error in the numerical simulation of a wave propagation problem, so it becomes possible that larger targets can be simulated without sacrificing accuracy.…”

Section: Introductionmentioning

confidence: 99%

Implementation and Application of the Spherical MRTD Algorithm

Liu¹,

Chen²,

Zhang³

et al. 2013

PIER

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Abstract-This paper illustrates an explicit multiresolution timedomain (MRTD) scheme based on Daubechies' scaling functions with a spherical grid for time-domain Maxwell's equations. The stability and dispersion property of the scheme are investigated and it is shown that larger cells decrease the numerical phase error, which makes it significantly lower than FDTD for low and medium discretizations. Moreover, this technique is applied to the modeling of an air-filled spherical resonator and the propagation of a radiating electric dipole in spherical coordinates, numerical results demonstrate the effectiveness of the proposed algorithm.

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“…The finite-difference time-domain (FDTD) method [17][18][19][20][21][22][23][24][25], which provides a simple and efficient way of solving Maxwell' equations for a variety of problems, has been widely applied in solving many types of electromagnetic problems. The FDTD method has been widely used to investigate the lightning protection since 1994 [26,27].…”

Section: Introductionmentioning

confidence: 99%

Induced Voltage on the Overhead Line at Oil Exploiting Port Under Lightning Strike

Meng¹,

Zhou²,

Yang³

2014

PIER

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Abstract-In this paper, a computational model is established for the finite-difference time-domain analyses of induced voltage on the overhead line at oil exploiting port under lightning strike. The MTLL approximate formulation is used to simulate the lightning strike, and convolutional perfectly matched layers are used to truncate the computational domain. A two-step method is established to calculate the coupling to the overhead lines to reduce the huge computational domain of the conventional 3-D FDTD simulation. Parallel implementation is introduced for the second-step calculation to overcome the memory storage limit of a single computer. With this model, the electromagnetic field at the adjacent areas and the induced voltage on the overhead line are studied when lightning strikes an oil derrick. It is demonstrated that the electromagnetic field decreases as the distance from the oil derrick increases, but the vertical field decrease much slower than the horizontal field. It is also shown that the transversely located overhead line will introduce lower voltage than the radially located line. As the length of the overhead line increases, the induced voltage increases and the low-frequency induction is strengthened. The overhead line should be set as low as possible to reduce the induced voltage.

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A Simple Local Approximation FDTD Model of Short Apertures With a Finite Thickness

Cited by 21 publications

References 34 publications

Parallel Implementation and Application of the MRTD With an Efficient CFS-PML

Parallel Implementation and Application of the MRTD With an Efficient CFS-PML

Implementation and Application of the Spherical MRTD Algorithm

Induced Voltage on the Overhead Line at Oil Exploiting Port Under Lightning Strike

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