Identification of elastic and damping properties is a challenge for fabrication of composite materials, which can have complex shapes. A new approach based on the Force Analysis Technique was developed to identify structural parameters from local equation of motion. For structures with known analytical models, this method gave good results. This work presents a similar approach to extend the previous method to structures which cannot be described with known analytical models, where the model is replaced by a Finite Element operator. In order to reduce the amplification of the measurement noise, a procedure based on a probabilistic approach coupled to a minimization of a cost function is proposed. The method is illustrated on a curved beam using simulated displacement. Then, an experimental validation is shown by using measured translations on an aluminum flat beam and on a sandwich curved beam.