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| Optimization of uncertain structures based on possibilistic reliability model |
| Revised:July 15, 2002 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20041006 |
| KeyWord:possibilistic reliability,structural reliability,structural optimization,reliability-based optimization |
| Guo Shuxiang~ |
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| Abstract: |
| The paper deals with the problem of optimization of uncertain structures. Reliability-based optimization of uncertain structures is usually solved using stochastic model, which needs a wealth of data on stochastic parameters and is often a time consuming task. A different strategy which makes use of possibilistic reliability theory we proposed in a previous paper was used here, a new procedure of reliability-based optimization for uncertain structural design was presented, which is parallel to the traditional stochastic-reliability-based optimization procedure. In the context, possibility theory was used to model uncertainties. Structural optimization was described as minimizing the failure possibility of structures for a given weight or cost, or minimizing the weight or cost for a specified allowable failure possibility. Because possibilistic reliability procedure does not require large amount of data, and be easy to compute, the present procedure can make use of limited available information, and reduce the computational cost. A numerical example shows that the present procedure is effective and feasible for optimization of uncertain structures. |
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