Numerical Simulation Method of Cables Conduction Interference Pulse Waveform

To obtain the know-how of the deficiency for the filling capability, taking Ti75 alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression with DEFORM-3D, analyzing the effect of the strain rates on the distribution of strain and stress.

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Study of the Effect of Centrifugal Force on Rotor Blade Icing Process

International Journal of Aerospace Engineering ◽

10.1155/2017/8695170 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Zhengzhi Wang ◽

Chunling Zhu

Keyword(s):

Numerical Simulation ◽

Centrifugal Force ◽

Rotor Blade ◽

Flow Direction ◽

Three Dimensional ◽

Simulation Method ◽

Two Phase ◽

Numerical Simulation Method ◽

Calculation Results ◽

Flow Field Characteristics

In view of the rotor icing problems, the influence of centrifugal force on rotor blade icing is investigated. A numerical simulation method of three-dimensional rotor blade icing is presented. Body-fitted grids around the rotor blade are generated using overlapping grid technology and rotor flow field characteristics are obtained by solving N-S equations. According to Eulerian two-phase flow, the droplet trajectories are calculated and droplet impingement characteristics are obtained. The mass and energy conservation equations of ice accretion model are established and a new calculation method of runback water mass based on shear stress and centrifugal force is proposed to simulate water flow and ice shape. The calculation results are compared with available experimental results in order to verify the correctness of the numerical simulation method. The influence of centrifugal force on rotor icing is calculated. The results show that the flow direction and distribution of liquid water on rotor surfaces change under the action of centrifugal force, which lead to the increasing of icing at the stagnation point and the decreasing of icing on both frozen limitations.

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Numerical Simulation for Uplift Bearing Capacity and Affecting Factors of the Digging Piles in Slope Ground

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.423-426.1292 ◽

2013 ◽

Vol 423-426 ◽

pp. 1292-1295 ◽

Cited By ~ 1

Author(s):

Xing Yun Wang ◽

Bin Peng ◽

Xiao Chao Tang ◽

Lian Fan

Keyword(s):

Numerical Simulation ◽

Regression Analysis ◽

Finite Difference ◽

Bearing Capacity ◽

Mutual Effect ◽

Simulation Method ◽

Affecting Factors ◽

Slope Ratio ◽

Nonlinear Regression Analysis ◽

Numerical Simulation Method

Based on the numerical simulation method, this paper has established the numerical simulation method by using of finite difference software of FLAC3D through establishing interface for digging pile-soil. It can consider mutual effect of digging pile-soil. The uplift bearing capacity of the digging pile in slope ground was calculated and the affecting factors of the bearing capacity were analyzed. The results show that the uplift bearing capacity has a negative correlation with the slope ratio, and has a positive correlation with the width or height of the foundation, which can be expressed as a quadratic polynomial. But when the slope ratio is smaller than a certain extent, the capacity no longer increases. Nonlinear regression analysis of calculation data are carried out. Finally, the calculation method of uplift bearing capacity about pile in the slope is developed, which can provide a reference to specification revision and engineering.

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