Résumé
Computer experiments are used when physical experiments are impracticable. A computer experiment consists of an evaluation, for a given input, of a function which describes the physical model. This function is said to be an expensive black-box function since it is known through a long time-consuming code only. Thus, a reduced model which approximates it and is fast to compute is needed to make analyses tractable. It is usually called a metamodel. In this study, the expensive black-box function modelizes the behaviour of an aircraft engine. Another difficulty comes from the fact that the domain of definition of the function which represents the acceptable flight conditions is unknown. Hence, we aim at providing an estimation of the indicator function associated to the domain and a metamodel which will approximate the function. This work is preliminary to a sensitivity analysis.