Paper number 700

TWO LAYER COMPOSITE SHELL FOR ANCHORED REFRACTORY LINING COMPUTING

C. Andrieux¹,², P. Boisse¹,², Y. Dutheillet³, V. Gabis², A. Gasser¹,², J. Rousseau¹,²

1Laboratoire de Modélisation et Mécanique des Structures, URA C.N.R.S. 1776
ENSAM Paris, Université Paris 6, 151 Boulevard de l'Hôpital,75013 Paris France
2Ecole Sup. de l'Energie et des Matériaux, 8 rue Léonard de Vinci, 45072 Orléans, France
3Electricité de France, EMA, Les Renardières, 77818 Moret-sur-Loing cedex, France

Summary

In circulating fluidized bed combustors, the refractory linings anchored to the steel structure (casing) are submitted to important thermal loading which conducts to cracking (due to the difference between the thermal coefficients). A first approach allows to analyse the problem at the anchor scale: a smeared crack model allows to compute the damage which is observed in an experimental test. But since a boiler or a cyclone contains thousand of anchors, it is not possible to compute a complete structure with this model. So, an approach was developed with a two-layer shell equivalent to the anchored lining and the casing. This model was identified with an inverse method, using results from the first approach and validated by a bending test performed on a refractory lining specimen.

Keywords

two layer composite shell finite element, smeared crack model, thermal loading, inverse identification, metallic anchor, refractory lining.