Patent ID: 11954408
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC G  F  B | IPC B  F  G

Claim 0:
1. A method of designing and manufacturing a modified aerofoil shape, the method comprising the steps of:
determining a plurality of resonant frequencies of a baseline aerofoil shape;
determining that one of the resonant frequencies falls within a predetermined range of frequencies;
providing a plurality of aerofoil sections that are two dimensional and define the baseline aerofoil shape as a plurality of volumes;
defining a modified aerofoil shape by displacing at least one of the plurality of aerofoil sections relative to its baseline position in the baseline aerofoil shape so as to vary its position along a chord-wise axis of the baseline aerofoil shape while maintaining positions of two other aerofoil sections on opposite sides of the at least one of the plurality of airfoil sections, without changing a shape of the at least one of the plurality of aerofoil sections, until one of the plurality of resonant frequencies previously falling within the range of frequencies is shifted outside the range of frequencies; and
manufacturing an aerofoil with the modified aerofoil shape.