METHOD FOR OPTIMIZING A DESIGN OF A ROTOR BLADE AND CORRESPONDING ROTOR BLADE

摘要

The invention relates to methods for optimizing a design of a rotor blade (1), which has a blade root (4) and an airfoil (5), a turbomachine in which an actual natural frequency of the rotor blade (1) detects the detected actual natural frequency a reference value or reference range is compared and, if a normal use of the blade (1) affecting deviation or coincidence between the actual natural frequency and the reference value or reference range is determined, a structural change to the blade (1) to change the natural frequency is made wherein as a structural change at least one recess (9; 15) is formed at a predetermined position on at least one side surface (2) of the blade root (4). Furthermore, the invention relates to a rotor blade (1) for a turbomachine which has a blade root (4) and an airfoil (5), wherein at least one recess (9; 15) is formed on at least one side surface (2) of the rotor blade root (4) ,