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The wave transmission characteristics of double trapezoida-ridge rectangular waveguide are analyzed by using the vector finite-element method. The cutoff wavelength of trapezoida-ridge waveguide and anti-trapezoid ridge waveguide which ridges are on the waveguide short side are calculated respectively. The results show that the ridge position on the short side of waveguide may shrink sing-mode bandwidth...
Crash-box equipped at the front end of a car, is one of the most important automotive parts for crash energy absorption. In case of frontal crash accident, it is expected to be collapsed with absorbing crash energy prior to other body parts so that the damage of the main cabin frame is minimized and passengers may be saved. In the present work, energy absorption characters of automobile crash-box...
This paper describes a topological configuration of a fault current limiter consisting of a permanent and saturable core. The operating characteristics of this permanent-magnet-biased saturation based fault current limiter (PMFCL) are simulated in details by means of finite element method (FEM) with ANSOFT. Firstly, the relationship between the total harmonic distortion of transient limiting current...
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