Evaluation of structural robustness basedon internal energy distribution
2011 (English)Manuscript (preprint) (Other academic)
Robustness evaluations give valuable information about the sensitivity of a structure to stochastic variation of design parameters, but are in general expensive to perform due to the extensive number of function evaluations required. Therefore, an Internal Energy Based (IEB) method is presented here, in which the structural sensitivity to variation of each thickness parameter is estimated based on the internal energy distribution obtained from one single function evaluation. In this way, the cost of such structural robustness evaluations is significantly reduced. However, the accuracy of the IEB method depends on the structural behaviour. Here it is tested for two structures with nonlinear displacement responses caused by impact loads. The method is however believed to be applicable to any structure exposed to a single load acting on a limited area of the structure, and for response functions related to the displacement of the loaded area.
Place, publisher, year, edition, pages
Robustness evaluations, Internal energy based gradients, Internal energy distribution, Internal energy based method, Structural robustness
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-70788OAI: oai:DiVA.org:liu-70788DiVA: diva2:441705