ESTABLISHING A SPECIFICATION FOR DIMENSIONING EQUIPMENT FOR TURBOMACHINE STRUCTURE

摘要

A method of establishing a sizing specification of equipment for mounting on a turbomachine structure such as a housing, the method comprising the steps of: - selecting (S8) an incident that may occur on the structure such as the loss of a rotor element of the turbomachine; simulating (S14) the presence of the equipment on the structure, at a point of attachment, by means of a mechanical oscillator having at least one natural frequency (f0) and at least one damping ratio (?); - vary the natural frequency and / or the damping rate according to at least two values; determining (S18) a sizing acceleration of the mechanical oscillator in response to the incident for each of said values of the natural frequency and the damping ratio; - delivering (S20) the specification comprising the design accelerations and the eigenfrequency values and corresponding damping rates.