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| A new method of reanalysis in structural optimization of truss |
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| DOI：10.7511/jslx19982022 |
| KeyWord:topology optimization,structural reanalysis,truss structure,explicit expression,basic displacement,global optimal solution, |
| Liu Liang\ \ Zhai Yu yi |
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| Abstract: |
| In terms of theory of finite element method (FEM), a new method about structural reanalyses in truss topology optimization is given, which can explicitly express relationships between structural design variables and structural responses. Therefore, the repeat structural reanalyses for new topology structures are not demanded so that a great amount of calculating time is spared. Meanwhile, the modified method of basic displacements corresponding to ground structure had been used that not only were the accumulated computed errors reduced, but it was also avoided that the process of topology optimization was breaked off because there may be the case of geometric changeable structures. Several instances show that this method had higher calculating efficiency (It can spare about 50% time of structural reanalyses corresponding to FEM) and reliability. |
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