With the development of complex terminal effects, semi penetration effect annular groove projectiles on multi-layer targets has obtained increasing attention. In this paper, based theory cavity expansion, a comparative analysis model is established for oblique projectile and ogive-nosed into targets. The FEM software LS-DYNA used to simulate calculate time history curves velocity, axis deviatio...

Abstract. Natural particles are frequently applied in drinking water treatment processes fixed bed reactors, fluidised and sedimentation to clarify concentrate solids. When settle, it has been found that, terms of hydraulics, natural behave differently when compared perfectly round spheres. To estimate the terminal settling velocity single solid a liquid system, comprehensive collection equatio...

Rising bubbles in liquid metals the presence of magnetic fields is an important phenomenon many engineering processes. The nonlinear behavior terminal rise velocities as a function increasing field strength has been observed experimentally, but it remains poorly understood. We offer explanation through numerical calculations. A single rising bubble stagnant metal applied horizontal simulated. s...

Aiming at the difficulty of fault location multi-source transmission lines, this paper proposes a method for multi-terminal lines based on branch judgment matrix. The traveling wave signal is decomposed by Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN), and IMFs sensitive components that can characterize characteristics target signals are selected constructing corr...

This article presents a new systematic technique for identifying voltage traveling waves (TWs) to determine the location of line faults in half-bridge modular multilevel converter-based high-voltage dc (HBMMC-HVdc) grids. In this technique, buffered signal frame around fault-detection time is first scaled and then segmented via an optimization process. Finally, incident/reflected TWs arrival ti...