Abstract
An apparatus (10) for applying at least one load to a specimen (12) according to one embodiment of the invention may comprise a mass (18). An actuator (20) mounted to the specimen (12) and operatively associated with the mass (18) moves the mass (18) along a linear displacement path (22) that is perpendicular to a longitudinal axis of the specimen (12). A control system (26) operativelyassociated with the actuator (20) operates the actuator (20) to reciprocate the mass (18) along the linear displacement path (22) at a reciprocating frequency, the reciprocating frequency being about equal to a resonance frequency of the specimen (12) in a test configuration.
| Original language | American English |
|---|---|
| Patent number | 7,953,561 |
| State | Published - 2011 |
NREL Publication Number
- NREL/PT-5000-51991
Keywords
- turbine
- wind energy
- wind-powered generator