| 摘要 |
<p>A resonance generating device for testing fatigue of a blade that maximizes a moving mass ratio according to the present invention comprises: a mounting means; a resonance generating means; and weights. The mounting means comprises a mounting part having a mounting groove with a shape corresponding to the outer surface of the blade; and a coupling part located at the outside of the mounting part and coupled by a coupling member so that the mounting part pressurizes the blade. The resonance generating means comprises: an actuator generating a linear movement; a weight frame, provided at the outside of the mounting means, for receiving a body and a load of the actuator therein, and having a closed-loop shape for improving structural stiffness to interlock with a displacement of the load of the actuator, thereby performing a linear reciprocating motion; and a linear guider for guiding the linear reciprocating motion of the weight frame when the position of the load of the actuator is changed. The weights are mounted on the opposite surfaces of the weight frame to interlock with the weight frame and can increase and decrease in the longitudinal direction of the blade so that the center of gravity of the moving mass can be located in the load when the weight frame performs the linear reciprocating motion. A method of testing fatigue using the resonance generating device for testing fatigue of a blade according to the present invention comprises: a mounting means installation step for installing a mounting means at a blade which is an element of a resonance generating device for testing fatigue of a blade, the mounting means comprising a mounting part having a mounting groove with a shape corresponding to the outer surface of the blade, and a coupling part located at the outside of the mounting part and coupled by a coupling member so that the mounting part pressurizes the blade; a resonance generating means installation step for installing a resonance generating means at one side of the mounting means, the resonance generating means comprising an actuator generating a linear movement, a weight frame provided at the outside of the mounting means for receiving a body and a load of the actuator therein and having a closed-loop shape for improving structural stiffness to interlock with a displacement of the load of the actuator, thereby performing a linear reciprocating motion, and a linear guider for guiding the linear reciprocating motion of the weight frame when the position of the load of the actuator is changed; a weight installing step for installing weights at one side of the resonance generating means, the weights being mounted on the opposite surface of the weight frame to interlock with the weight frame and being capable of increasing and decreasing in the longitudinal direction of the blade so that the center of gravity of the moving mass can be located in the load when the weight frame performs the linear reciprocating motion; and a resonance generating step for generating resonance in the blade by allowing the load of the actuator to be interlocked with the weight frame and the weights by means of a linear reciprocating motion.</p> |
