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| An exact method for structural static reanalysis |
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| DOI：10.7511/jslx19963043 |
| KeyWord:finite element method,structural analysis/static reanalysis, |
| Huang Chuanqi |
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| Abstract: |
| This paper presents a structural static reanalysis method. Through the introduction of structural rigid motion eigenvectors, the generalized structural compliance matrix can be introduced and the original stiffness equation of higher order is transformed into a linear system of much lower order. The general solution of displacements can be expressed prior to any assignment of boundary conditions. For locally modified structures, the structural compliance matrix can be adjusted quickly. This static reanalysis method can be used for structures with modifications on boundary conditions, loading conditions and structural elements, either independently or in combination. Two test examples are provided in the paper to prove the efficiency of the method. |
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