Reply to comment from B. Larsson about paper "Accuracy in the identification of generator thermal bow", JSV (2004) 274(1), 273-295. By P. Pennacchi and A. Vania

The authors appreciate the comments. It is evident that Dr. Larsson's remarks are due to misunderstandings about basic aspects of the model-based technique used to identify faults in rotating machines. These basics are not contained in the paper since they were described in detail in our cited Refs. [1–5]. In the introduction of the paper, to which Dr. Larsson refers, dynamic effects of machine faults are simulated by means of sets of equivalent forces and moments applied to the nodes of the finite element model of the rotor train. This approach can also be used to take into account the dynamic effects induced by geometrical deformations of the shaft like a bow.