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| Optimization algorithm of critical load of a thin-walled frame with variable cross-section based on improved particle swarm |
| Received:April 13, 2017 Revised:July 31, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20170413001 |
| KeyWord:frame stability nonlinear differential equations IPSO critical load variable cross-section |
| Author | Institution |
| 侯祥林 |
沈阳建筑大学 机械工程学院, 沈阳 |
| 王似巍 |
沈阳建筑大学 机械工程学院, 沈阳 |
| 王家祥 |
沈阳建筑大学 土木工程学院, 沈阳 |
| 贾连光 |
沈阳建筑大学 土木工程学院, 沈阳 |
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| Abstract: |
| In order to study the stability of a large thin-walled structure, a kind of single-bay frame in symmetrical structure with arbitrary constraints under asymmetric loadings has been built.The frame is modelled as a number of Timoshenko beams.Based on the finite difference method and optimization method, using nodal deflections, critical load, axial force, shear force and bending moment as the design variables, nonlinear differential equations are built.An optimization algorithm of critical load based on improved particle swarm with competitive thought is put forward.JAVA computer language is used to develop the optimization procedure and ABAQUS used to obtain the simulation results of the example.Fewer design variables are needed to get effective position and critical load with high precision.A mechanical relation of position and loading on the frame could be better described to give a further support for engineering design and analysis. |
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