Stochastic Imperfection Mode Superposition Method for Stability Analysis of Lattice Domes

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Based on geometrically nonlinear FEM, combined with stochastic imperfection mode, the stochastic imperfection mode superposition method was proposed for domes. Using the method the least favorable distribution of imperfection can be found and the corresponding critical buckling load of the structure can be calculated. Moreover the process of the structure with the load increment can be tracked. Finally the example demonstrated effectiveness of the method in finding the least favorable distribution of imperfection and the critical buckling load.

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788-792

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December 2013

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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