scholarly journals Influence of finite element structural modification on dynamic characteristics of transmission tower

2021 ◽  
Vol 1865 (3) ◽  
pp. 032067
Author(s):  
Mingjian Jian ◽  
Jidong Li ◽  
Hualing Deng ◽  
Huakai Zhang ◽  
Tangqing Yuan ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Structural Modification ◽  
Transmission Tower

Dynamic Characteristic Analysis and Structural Modification of a 5-Axis Horizontal Machining Center Considering Joint Surface

2011 ◽  
Vol 697-698 ◽  
pp. 513-516
Author(s):  
Y.G. Shi ◽  
Xing Yu Zhao ◽  
Li Qiang Zeng ◽  
H.Y. Wang ◽  
Da Wei Zhang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristic ◽  
Dynamic Characteristics ◽  
Structural Modification ◽  
Weak Link ◽  
Joint Surface ◽  
Element Calculation ◽  
Characteristic Analysis ◽  
Machining Center ◽  
Surface Dynamic

In order to make a 5-axis linkage horizontal machining center have better dynamic characteristics, considering the influence of joint surface, dynamic characteristic analysis is conducted to the machining tool. Based on finite element modal analysis results, the weak link is found and optimized. Through the finite element calculation and analysis, the structure rigidity obviously raises after optimization. This offers a new idea on how to improve the rigidity of complete machine of machining tool for later research.

Dynamic Characteristics Analysis for 1000kV UHV Steel Tubular Tower under Seismic Loading

2014 ◽  
Vol 494-495 ◽  
pp. 1815-1819
Author(s):  
Li Qiang An ◽  
Yu Chu Liu ◽  
Bing Zhang
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Transmission Lines ◽  
Seismic Loading ◽  
Element Model ◽  
Steel Tube ◽  
Seismic Loads ◽  
Transmission Tower ◽  
Finite Element Software ◽  
The Impact

In this paper, the dynamic characteristics of a 1000kV UHV steel tubular tower with double circuit transmission lines on the same tower are analyzed under seismic loading with 8 degrees fortification intensity. Firstly, the finite element model of the tower and simulation of the earthquake are built in ANSYS finite element software. The dynamic characteristics of steel tube tower under Seismic Loads, such as the time-domain curves of displacement, velocity and force of UHV steel tower under Seismic Loads are obtained. The impact of 1000kV UHV transmission tower under nonlinear vibration of simplified conductor model is studied. The results can help to understand the damage forms of UHV steel tower under earthquake, to improve the capabilities to resist earthquake loads and severe damage of environmental loads under various field conditions for UHV steel tower.

An Approach to the Problem of Vibration: Structural Modification by Optimizing Density Distribution

1994 ◽  
Author(s):  
Yoshiko Kawabe ◽  
Shinobu Yoshida
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Density Distribution ◽  
Dynamic Characteristics ◽  
Material Properties ◽  
Structural Modification ◽  
Variable Density ◽  
The Finite Element Method ◽  
3 Dimensional ◽  
Mode A

Abstract This paper proposes a basic method for designing light and rigid structures that maximize the natural frequency of the structure for a designated mode. A design variable ‘density’ is introduced into the finite element method and is related to the material properties of a 3-dimensional solid element. Thus, a structure is expressed as a density distribution inside its occupiable domain, and the optimal structure is obtained by searching for the most suitable density distribution. The dynamic characteristics of the structure are improved by repeatedly modifying its density distribution.

A modified damping model of vector form intrinsic finite element method for high-speed spiral bevel gear dynamic characteristics analysis

2021 ◽  
pp. 030932472110188
Author(s):  
Xiangying Hou ◽  
Yuzhe Zhang ◽  
Hong Zhang ◽  
Jian Zhang ◽  
Zhengminqing Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Numerical Solutions ◽  
Bevel Gear ◽  
Spiral Bevel Gear ◽  
Vector Form ◽  
Good Efficiency ◽  
Spiral Bevel ◽  
Damping Model

The vector form intrinsic finite element (VFIFE) method is springing up as a new numerical method in strong non-linear structural analysis for its good convergence, but has been constricted in static or transient analysis. To overwhelm its disadvantages, a new damping model was proposed: the value of damping force is proportional to relative velocity instead of absolute velocity, which could avoid inaccuracy in high-speed dynamic analysis. The accuracy and efficiency of the proposed method proved under low speed; dynamic characteristics and vibration rules have been verified under high speed. Simulation results showed that the modified VFIFE method could obtain numerical solutions with good efficiency and accuracy. Based on this modified method, high-speed vibration rules of spiral bevel gear pair under different loads have been concluded. The proposed method also provides a new way to solve high-speed rotor system dynamic problems.

Structural modification and evaluation using finite element reconciliation method

2019 ◽  
Author(s):  
M. A. S. Aziz Shah ◽  
M. A. Yunus ◽  
M. N. Abdul Rani ◽  
M. A. Ayub ◽  
M. S. M. Sani ◽  
...  
Keyword(s):  
Finite Element ◽  
Structural Modification ◽  
Reconciliation Method

Finite Element Analysis for the Collapse Accident of a 110kV Transmission Tower

2014 ◽  
Vol 986-987 ◽  
pp. 927-930
Author(s):  
Yi Zhu ◽  
Bo Li ◽  
Hao Wang ◽  
Kun Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Strong Wind ◽  
Transmission Tower ◽  
Element Analysis ◽  
Straight Line ◽  
The Finite Element Analysis

Put the finite element analysis of line tower coupling modeling to the collapse of a 110 kV line straight-line tower, study the effect of strong wind on transmission tower and wire. The results show that under the action of strong wind, the material specification selected by the part of the rods on the type of tower is lower, cross section is smaller, the principal material of tower will be instable and flexional under the compression, resulting in tower collapsed.

Static and Dynamic Characteristics Analysis of Precise Composite CNC Grinding Machine

2011 ◽  
Vol 411 ◽  
pp. 88-93
Author(s):  
Hong Lin Zhao ◽  
Yun Fei Sun ◽  
Rui Chen ◽  
Yu Mei Huang ◽  
Guang Peng Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Machine Model ◽  
Static And Dynamic Characteristics ◽  
Cnc Grinding ◽  
Characteristics Analysis ◽  
The Subject ◽  
Grinding Machine ◽  
Cnc Grinding Machine

The parameters of joint parts must be included in the finite element model of a whole grinding machine. The subject investigated in this paper is B2-K3000 high-precision composite flexible grinding machine. Through finite element modeling, the joint part parameters are integrated into the whole grinding machine model to establish a dynamic model and then analyze its static and dynamic characteristics. The result shows that the whole grinding machine possesses good features, but it still needs to be improved. This paper gives suggestions for its structure development and application.

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