Wind-Induced Responses of a Transmission Angle Tower in Coastal Areas

2014 ◽  
Vol 678 ◽  
pp. 587-590
Author(s):  
Yi Jiang Wu ◽  
Bo Chen ◽  
Gan Jun Wang ◽  
Qing Jiang Chen
Keyword(s):  
Structural Model ◽  
Wind Loading ◽  
Response Analysis ◽  
Transmission Tower ◽  
Line System ◽  
Steel Material ◽  
Transmission Angle ◽  
Commercial Package ◽  
Structural Responses ◽  
Element Approach

The dynamic response analysis of a transmission angle tower subjected to wind excitations is actively carried out in this study. The structural model is constructed based on finite element approach with the aiding of commercial package ANSYS. The equation of motion of the transmission tower-line system under wind excitations is established. The dynamic wind loading are applied on the tower-line system to examine the structural responses. The deformation and stresses distribution of the transmission angle tower are computed to explore the structural performance. The made observations indicate that the peak stresses of some members are large than the permitted yielding stresses of steel material.

Damage Inspection and Assessment on a Transmission Angle Tower in Coastal Areas

2013 ◽  
Vol 671-674 ◽  
pp. 650-654
Author(s):  
Peng Yun Li ◽  
Bo Chen ◽  
Yu Zhou Sun
Keyword(s):  
Structural Model ◽  
Wind Loading ◽  
Transmission Tower ◽  
Line System ◽  
Steel Material ◽  
Transmission Angle ◽  
Commercial Package ◽  
Loading Effects ◽  
Structural Responses ◽  
Element Approach

The field inspection and safety assessment of a transmission angle tower are actively carried out in this study. The field measurement and inspection are firstly introduced and then the structural model is constructed based on finite element approach with the aiding of commercial package ANSYS. The equation of motion of the transmission tower-line system is established for numerical analysis. The gravity, base settlement and dynamic wind loading are applied on the tower to examine the structural responses. The deformation and stresses distribution of the transmission angle tower are computed to explore the damage reasons. The made observations indicate that the peak stresses of some members are large than the permitted yielding stresses of steel material. The damage event is induced by coupling loading effects

Research on Dynamic Responses of a Transmission Tower under Monsoon Wind

2015 ◽  
Vol 744-746 ◽  
pp. 248-252
Author(s):  
Wen Ping Xie ◽  
Bo Chen ◽  
Peng Yun Li ◽  
Xiao Fen Gong
Keyword(s):  
Element Model ◽  
Dynamic Responses ◽  
Structural Performance ◽  
Wind Loading ◽  
Transmission Tower ◽  
Line System ◽  
Commercial Package ◽  
Structural Responses ◽  
Monsoon Wind ◽  
The Finite Element Model

The research on dynamic responses of a transmission tower under monsoon wind is actively carried out in this study. A real transmission tower-line system constructed in the southern coastal areas of China is taken as an example to investigate the structural performance subjected to monsoon wind. The finite element model of the transmission tower-line system is established with the aiding of commercial package. The equation of motion of the transmission tower-line system under monsoon wind is established. The dynamic wind loading are applied on the tower-line system to examine the structural responses.

Evaluation on Dynamic Responses of Transmission Lines Subjected to Wind Excitations

2015 ◽  
Vol 744-746 ◽  
pp. 82-87
Author(s):  
Peng Yun Li ◽  
Bo Chen ◽  
Wen Ping Xie ◽  
Hao Liu
Keyword(s):  
Transmission Lines ◽  
Structural Model ◽  
Dynamic Responses ◽  
Induced Response ◽  
Transmission Tower ◽  
Line System ◽  
Long Span ◽  
Commercial Package ◽  
Element Approach ◽  
Strong Winds

The evaluation on dynamic responses of transmission lines subjected to wind excitations is actively carried out in this study. A transmission tower-line system constructed in the southern coastal areas of China is taken as example to examine the wind induced response of the transmission lines. The structural model is established based on finite element approach by using commercial package. The displacement, velocity and acceleration responses of the transmission lines are computed to explore structural performance. The made observations indicate that the transmission lines vibrant substantially when subjected to strong winds. It is obvious that the dynamic responses of the ground wire are smaller than those of the wire and the responses in the long span are much larger than those in the short span.

Performance Evaluation of a Transmission Tower Subjected to Base Settlement

2015 ◽  
Vol 744-746 ◽  
pp. 361-365
Author(s):  
Yi Jiang Wu ◽  
Qing Dong Meng ◽  
Gan Jun Wang
Keyword(s):  
Finite Element ◽  
Structural Damage ◽  
Element Model ◽  
Structural Safety ◽  
Transmission Tower ◽  
Element Analysis ◽  
Line System ◽  
Transmission Angle ◽  
Element Approach ◽  
Internal Forces

The simulation of support settlement of a transmission angle-tower is actively carried out in this study based on the actual structural damage events. The mechanical model of the transmission angle-tower is developed based on the spatial member finite element approach. The finite element model of the transmission tower-line system is constructed by taking a real 220KV transmission tower as an example. The support settlement of the tower is analyzed and the collected information are utilized in the structural finite element analysis. The made observations indicate that the support settlement may induce large structural internal forces, which may induce potential disk to the structural safety.

scholarly journals Random Wind-induced Response Analysis of Transmission Tower-line System

2012 ◽  
Vol 16 ◽  
pp. 1813-1821 ◽  
Author(s):  
Qin Li ◽  
Yuan Junjian ◽  
Li Wei
Keyword(s):  
Induced Response ◽  
Response Analysis ◽  
Transmission Tower ◽  
Line System

scholarly journals Investigation and Development of a Three-Dimensional Transmission Tower-Line System Model Using Nonlinear Truss and Elastic Catenary Elements for Wind Loading Dynamic Simulation

2021 ◽  
Vol 2021 ◽  
pp. 1-29
Author(s):  
Xiao Zhu ◽  
Ge Ou
Keyword(s):  
Transmission Line ◽  
Open Source ◽  
Three Dimensional ◽  
Initial Strain ◽  
Wind Loading ◽  
Transmission Line Model ◽  
Transmission Tower ◽  
Line Model ◽  
Line System ◽  
Truss Element

The accuracy of transmission tower-line system simulation is highly impacted by the transmission line model and its coupling with the tower. Owing to the high geometry nonlinearity of the transmission line and the complexity of the wind loading, such analysis is often conducted in the commercial software. In most commercial software packages, nonlinear truss element is used for cable modeling, whereas the initial strain condition of the nonlinear truss under gravity loading is not directly available. Elastic catenary element establishes an analytical formulation for cable structure under distributed loading; however, the nonlinear iteration to reach convergence can be computational expensive. To derive an optimal transmission tower-line model solution with high fidelity and computational efficiency, an open-source three-dimensional model is developed. Nonlinear truss element and elastic catenary element are considered in the model development. The results of the study imply that both elements are suitable for the transmission line model; nevertheless, the initial strain in nonlinear truss element largely impacts the model accuracy and should be calibrated from the elastic catenary model. To cross-validate the developed models on the coupled transmission tower and line, a one-span eight-line system is modeled with different elements and compared with several state-of-the-art commercial packages. The results indicate that the displacement time-history root-mean-square error (RMSE) of the open-source transmission tower-line model is less than 1 % and with a 66 % computational time reduction compared with the ANSYS model. The application of the open-source package transmission tower-line model on extreme wind speed considering the aerodynamic damping is further implemented.

Dynamic Energy of a Large Scale Transmission Tower Subjected to Wind Excitations

2011 ◽  
Vol 383-390 ◽  
pp. 3645-3651
Author(s):  
Bo Li ◽  
Bo Chen ◽  
Chun Xia
Keyword(s):  
Large Scale ◽  
Dynamic Performance ◽  
Evaluation Criteria ◽  
Response Analysis ◽  
Transmission Tower ◽  
Structural Dynamic ◽  
Line System ◽  
Energy Characteristics ◽  
Energy Evaluation ◽  
Wind Response

Evaluation on energy characteristics of a wind-excited transmission tower-line system is actively carried out in this study. The analytical method of a transmission tower-line system is established. The evaluation criteria of energy responses is developed and applied to the wind response analysis of a transmission tower. A real transmission tower-line system constructed in China is taken as an example to examine the feasibility and reliability of the proposed approach. The observations from numerical investigation indicate that the proposed energy evaluation criteria can be effectively utilized in the examination on structural dynamic performance.

scholarly journals Dynamic Responses and Vibration Control of the Transmission Tower-Line System: A State-of-the-Art Review

2014 ◽  
Vol 2014 ◽  
pp. 1-20 ◽  
Author(s):  
Bo Chen ◽  
Wei-hua Guo ◽  
Peng-yun Li ◽  
Wen-ping Xie
Keyword(s):  
Dynamic Analysis ◽  
Vibration Control ◽  
Dynamic Responses ◽  
Analytical Models ◽  
Equivalent Model ◽  
Wind Loading ◽  
Fe Model ◽  
Transmission Tower ◽  
Tuned Mass Dampers ◽  
Line System

This paper presented an overview on the dynamic analysis and control of the transmission tower-line system in the past forty years. The challenges and future developing trends in the dynamic analysis and mitigation of the transmission tower-line system under dynamic excitations are also put forward. It also reviews the analytical models and approaches of the transmission tower, transmission lines, and transmission tower-line systems, respectively, which contain the theoretical model, finite element (FE) model and the equivalent model; shows the advances in wind responses of the transmission tower-line system, which contains the dynamic effects under common wind loading, tornado, downburst, and typhoon; and discusses the dynamic responses under earthquake and ice loads, respectively. The vibration control of the transmission tower-line system is also reviewed, which includes the magnetorheological dampers, friction dampers, tuned mass dampers, and pounding tuned mass dampers.

Study on Broken Wire Impact and Safety Degree Evaluation

2013 ◽  
Vol 275-277 ◽  
pp. 229-237 ◽  
Author(s):  
Lin Hui Yang ◽  
Rong Xiao ◽  
Xian Wu Ji ◽  
Hong Nan Li ◽  
Tong Sun
Keyword(s):  
Impact Load ◽  
Three Dimensional ◽  
Internal Force ◽  
Response Analysis ◽  
Transmission Tower ◽  
Analysis Model ◽  
Coupling Vibration ◽  
Line System ◽  
Significant Difference ◽  
Three Dimensional Finite Element

Considering transmission tower-line system coupling vibration ,construct a three dimensional finite element nonlinear analysis model for 500KV Shanghai to Xuzhou transmission line project.Execute Dynamic response analysis of transmission tower-line system under broken wire impact with SAP2000.The results show that :broken wire influence on the reaction of transmission tower-line system displacement and internal force can not be ignored ;influence on the reaction of transmission tower-line system displacement and internal force caused by ground wire broken is less while that of conductor is significant,peak value of a stem internal force can be as much as 2 times initial axial force ;the more wires are broken,the vibration response of transmission tower-line system is greater, the safety degree is lower;when it comes to internal force,there is significant difference between consider broken wire load as impact load and as static load,dynamic effects cannot be ignored.

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