scholarly journals Study on mechanical characteristics of conductors with three-dimensional finite-element models

2020 ◽  
Vol 7 (5) ◽  
pp. 200309
Author(s):  
Jiaqiong Liu ◽  
Bo Yan ◽  
Guizao Huang ◽  
Zheyue Mou ◽  
Xin Lv ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Transmission Lines ◽  
Mechanical Characteristics ◽  
Three Dimensional ◽  
Dynamic Responses ◽  
Structural Details ◽  
Dimensional Finite Element ◽  
Ice Shedding ◽  
Three Dimensional Finite Element

Refined three-dimensional (3D) finite-element (FE) models of typical aluminium conductor steel reinforced (ACSR) and formed aluminium conductor steel reinforced (FACSR) with structural details to simulate their static and dynamic characteristics are proposed. Taking into account the elastoplastic behaviour of the aluminium wires, the tensile mechanical properties and coupling between tension and torsion of the two types of conductors under tensile loading are numerically investigated. Furthermore, dynamic responses of two transmission lines, in which the refined 3D segment models and equivalent beam models of the two types of conductors are used, after ice-shedding are numerically simulated and the dynamic characteristics of the conductors are analysed. Finally, based on the numerical simulation results, the fatigue lives of the aluminium wires are estimated and the wear between the wires is discussed. It is revealed that taking into account the structural details of the conductors in the strength design of transmission lines is necessary, and the mechanical characteristics of FACSR are better than those of the ACSR in both static and dynamic situations.

Dynamic Analysis of Large-Scale Power House

2012 ◽  
Vol 446-449 ◽  
pp. 837-840
Author(s):  
Yu Zhao ◽  
Shu Fang Yuan ◽  
Jian Wei Zhang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Large Scale ◽  
Three Dimensional ◽  
Dynamic Responses ◽  
Dynamic Loads ◽  
Element Analysis ◽  
Power House ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

The underwater structure of power house is major structure under the dynamic loads of unit. The vibration problem is very common in operation. So the structures should have sufficient stiffness to resist dynamic loads of unit. This paper establishes three-dimensional finite element models with finite element analysis software—ANSYS. Dynamic characteristics of the power house and dynamic responses of structure under earthquake are analyzed. The results of the computation show that fluid-solid coupling may be ignored when studying dynamic characteristics of structures of the underground power house.

Study on Pre-Processing Method and Software Platform Development for Three-Dimensional Finite Element of Electric Transmission Lines Based on Solid Modeling

2014 ◽  
Vol 716-717 ◽  
pp. 1446-1450
Author(s):  
Zhen Huan Liu ◽  
Yao Lu ◽  
Hui Chun Xie ◽  
Jian Gong Zhang ◽  
Hao Wan ◽  
...  
Keyword(s):  
Finite Element ◽  
Electric Power ◽  
Transmission Lines ◽  
Three Dimensional ◽  
Solid Modeling ◽  
Element Analysis ◽  
Electric Transmission ◽  
Modeling Software ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Through the implementation of algorithm based on B-Rep three-dimensional solid modeling techniques, combination with substation, pole tower, electric transmission line and other electric power facilities, C# is used as the main development language and Microsoft Visual Studio2013 is applied to develop three-dimensional solid modeling software of electric power facilities to serve as pre-processing part of CAE system and provide software technology support for finite element analysis.

The Analysis of Dynamic Characteristics for the Powerhouse Structure of the Riverbed-Hydroelectric Station

2012 ◽  
Vol 226-228 ◽  
pp. 1285-1288
Author(s):  
Xuan Mao Peng ◽  
Zheng Xiang Song ◽  
Lin Jiang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Dynamic Stress ◽  
Three Dimensional ◽  
Hydroelectric Station ◽  
Element Model ◽  
Calculation Model ◽  
Dimensional Finite Element ◽  
Hanjiang River ◽  
Three Dimensional Finite Element

The paper creates a three-dimensional finite element model with the Xihe Project on the Hanjiang River as a background. The space integrated finite element method is applied to analyze the dynamic characteristics of the spatial structure of the riverbed-hydroelectric station. The aim is to calculate and analyze the free vibration characteristics of the whole structure, the dynamic displacement and the dynamic stress under the two typical conditions. The calculation model is effective to consider the interaction of the upstream dam section, the main and auxiliary powerhouse and the downstream water retaining structure, as well as the foundation. The results obtained will be a valuable reference for optimizing the dynamic characteristics of the powerhouse structure of riverbed-hydroelectric station and improving the engineering design.

Three-Dimensional Finite Element Simulations of the Dynamic Response of a Fingertip to Vibration

2008 ◽  
Vol 130 (5) ◽  
Author(s):  
John Z. Wu ◽  
Kristine Krajnak ◽  
Daniel E. Welcome ◽  
Ren G. Dong
Keyword(s):  
Finite Element ◽  
Vascular Function ◽  
Soft Tissues ◽  
Three Dimensional ◽  
Dynamic Responses ◽  
Physiological Data ◽  
Fe Model ◽  
Functional Changes ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Although excessive dynamic deformation of the soft tissues in the fingertip under vibration loading is thought to induce hand-arm vibration syndrome, the in vivo distributions of the dynamic stress/strain of the tissues in the fingertip under vibration conditions have not been studied because they cannot be measured experimentally. In the present study, we analyzed the dynamic responses of a fingertip to vibrations by extending our previously proposed three-dimensional finite element (FE) model. The FE model of the fingertip contains the essential anatomical structures of a finger, such as skin layers (dermis and epidermis), subcutaneous tissue, bone, and nail. Our analysis indicated that the fingertip has a major local resonance around 100Hz and that the vibration displacement in the soft tissues under the nail bed is less than 10% of those in the finger pad for all precompression levels and vibration range. The resonant frequency of the fingertip was found to increase from 88Hzto125Hz with the static precompression increasing from 0.5mmto2.0mm. These results suggest that structural and functional changes in vascular function will likely initiate from the fingerpad, the location that undergoes the greatest deformation during vibration exposure. The current predictions are qualitatively consistent with the physiological data collected from workers with vibration white finger.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

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