Three-Dimensional Dynamic Characteristics Analysis of Large Span Cable-Stayed Aqueduct

The column of heavy double turret five-axis horizontal milling complex machining center is taken as the object of study. Solidworks is used to establish three-dimensional model of milling machining center column, the established modal is be imported into ANSYS Workbench for static and dynamic characteristics analysis. First, by comparing the column deformation, the stress and strain under no-load and load conditions, which is concluded that column design is too conservative and be optimized. Secondly, the modal analysis was carried out on the column, which provides a theoretical basis for the optimization of the column by getting the first six natural frequencies and mode shapes of cloud.

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Dynamic Characteristics Analysis of Large-Span Cable-Stayed Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.713-715.22 ◽

2015 ◽

Vol 713-715 ◽

pp. 22-25

Author(s):

Xiao Xing Shi

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Dynamic Characteristics ◽

Element Model ◽

Element Analysis ◽

Large Span ◽

Earthquake Resistant ◽

Characteristics Analysis ◽

Dynamic Characteristics Analysis ◽

Cable Stayed Bridges

The built-up large-span cable-stayed bridges are taken as the engineering background Integrated finite element analysis for whole bridge is applied to establish finite element model of calculative reference bridge . General finite element project is adopted to establish space finite element model for the full bridge, calculate its dynamic characteristics, combine other same types’ theoretical calculation, and analyze the dynamic characters of this kind of bridge, which provide references for the earthquake-resistant and wind-resistant design of this type of bridge.

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Dynamic Characteristics Analysis of Cable-Rib Tension Deployable Antenna

Volume 5A: 40th Mechanisms and Robotics Conference ◽

10.1115/detc2016-59218 ◽

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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