Method of detecting damage to an engine bearing

摘要: The invention relates to a method of detecting damage in bearing supporting at least one rotary shaft an engine rotation, the consisting in: defining measurement period corresponding range speeds rotation during renewable activity low operation engine; acquiring over entire vibratory signal representative acceleration components sampling as function speed period; transforming sampled into frequency obtain spectrum lines shaft; calculating mean amplitudes lines; determining amplitude peaks around multiples theoretical damaged roller; ratio between each peak and level determined for sound bearing; comparing that is obtained with predetermined threshold.