Dynamic Characteristics Analysis of Two Adjacent Transmission Towers

2012 ◽  
Vol 446-449 ◽  
pp. 833-836
Author(s):  
Xiang Mei Yan
Keyword(s):  
Dynamic Characteristics ◽  
Transmission Towers ◽  
Characteristics Analysis ◽  
Dynamic Characteristics Analysis

Dynamic Characteristics Analysis of Two Adjacent Transmission Towers

2012 ◽  
Vol 446-449 ◽  
pp. 833-836
Author(s):  
Xiang Mei Yan
Keyword(s):  
Dynamic Analysis ◽  
Dynamic Characteristics ◽  
Transverse Direction ◽  
Longitudinal Direction ◽  
Transmission Towers ◽  
Straight Line ◽  
Characteristics Analysis ◽  
Suspended Cables ◽  
Analysis Models ◽  
Dynamic Characteristics Analysis

Dynamic analysis models of two adjacent transmission towers, two adjacent corner towers and the correspond single-tower are established, its dynamic characteristics are analyzed and compared. The results showed that: Dynamic characteristics of two adjacent transmission towers are close, but the towers connected with the corner tower changes much. Compared with the single-tower, its dynamic characteristics have changed regardless of corner tower or straight line transmission towers. It is also shown that suspended cables not only have mass effects, but have coupled stiffness effects applied to towers on transverse direction and longitudinal direction.

Dynamic Characteristics Analysis of Cable-Rib Tension Deployable Antenna

2016 ◽  
Author(s):  
Liu Ruiwei ◽  
Hongwei Guo ◽  
Zhang Qinghua ◽  
Rongqiang Liu ◽  
Tang Dewei
Keyword(s):  
Dynamic Characteristics ◽  
Structural Parameters ◽  
Element Model ◽  
Structure Design ◽  
Antenna Structure ◽  
Characteristics Analysis ◽  
New Type ◽  
Dynamic Characteristics Analysis ◽  
The Finite Element Model ◽  
Weight Dynamic

Balancing stiffness and weight is of substantial importance for antenna structure design. Conventional fold-rib antennas need sufficient weight to meet stiffness requirements. To address this issue, this paper proposes a new type of cable-rib tension deployable antenna that consists of six radial rib deployment mechanisms, numerous tensioned cables, and a mesh reflective surface. The primary innovation of this study is the application of numerous tensioned cables instead of metal materials to enhance the stiffness of the entire antenna while ensuring relatively less weight. Dynamic characteristics were analyzed to optimize the weight and stiffness of the antenna with the finite element model by subspace method. The first six orders of natural frequencies and corresponding vibration modes of the antenna structure are obtained. In addition, the effects of structural parameters on natural frequency are studied, and a method to improve the rigidity of the deployable antenna structure is proposed.

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