J4  2013, Vol. 47 Issue (3): 480-487    DOI: 10.3785/j.issn.1008-973X.2013.03.012
 土木工程

Improved PSO based pretension optimum of
cable net in antenna
XIA Mei-meng, GUAN Fu-ling
Space Structures Research Center, Zhejiang University, Hangzhou 310058, China
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Abstract:

In order to resolve the pretension solution when the cable net of antenna was straining, the space geometry characteristic of cable net structure was utilized to simplify the problem through extracting part structure from the whole and adding a corresponding boundary. Based on the equilibrium matrix method, the problem of force finding by form of the simplified the structure was translated into a mathematically constrained optimization problem. The particle swarm optimization (PSO) was improved and combined with the taboo search (TS) to solve the optimization problem. This method was used on a specific example about pretension optimum of parabolic cable net structure of triclinic mesh in antenna, and the results was put as the initial force into the cable net structure finite element model for nonlinear finite element analysis. The root-mean-square (RMS) of the displacement of cable net nodes and the surface accuracy of the corresponding physical model was 0.219mm, which proved the feasibility and correctness of the improved algorithm.

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