RESONANCE GENERATING DEVICE FOR TESTING FATIGUE OF BLADE THAT MAXIMIZES MOVING MASS RATIO AND FATIGUE TESTING METHOD USING SAME

摘要

The present invention relates to a resonance generating apparatus with maximized moving mass ratio for a blade's fatigue testing, which includes a light-weighted mounting portion provided in contact with an external surface of the blade, a plurality of actuators provided on an external side of the mounting portion, and a resonance generator configured to generate bending loads in association with displacement of rods of the actuators, and to reciprocate in parallel relationship with a moving direction of the actuator rod and simultaneously to prevent the resonance generator's motions in all directions except for a direction of testing, and a fatigue testing method using the same.

主权项

1. A resonance generating apparatus for a blade's fatigue testing with maximized moving mass ratio, the resonance generating apparatus comprising:
a mounting portion comprising a saddle comprising a groove corresponding in form to an external surface of the blade, and an assembling portion provided outside the saddle to be tightened with a tightening member so that the saddle exerts a pressure on the blade; a resonance generator comprising an actuator to generate linear movement, a weight frame which houses an actuator therein, has a closed-loop configuration to improve structural rigidity, and which linearly reciprocates in association with a displacement of the actuator rod, and a linear guide configured to guide the linear reciprocation of the weight frame when the actuator rod displaces; and additional weights mounted on opposed surfaces of the weight frame to be moved in association with the weight frame, and added or reduced in number in a lengthwise direction of the blade to position the center of gravity of moving masses to the rod during linear reciprocation of the weight frame.