Method of modifying the natural frequency of an airfoil for a gas turbine engine and the corresponding airfoil

摘要

An airfoil for a gas turbine engine component such as a turbine blade (20) is tuned to move its natural frequency outside of a frequency which will be excited during an expected speed range of an associated gas turbine engine. The airfoil is tuned about locations of the anti-nodes in an original airfoil design. The tuning affects only the interfered frequency. For example, material may be added (28) or removed (26) and may be smoothed to reduce stress concentrations.