Stochastic Motor Blade Dynamics.
Abstract
The results of a theoretical investigation into the effects of atmospheric turbulence on the dynamical behavior of helicopter rotor blades are reported. Turbulence is found to destabilize the uncoupled flapping and coupled flapping-torsional motions; however, it stabilizes the coupled flapping-lagging motion by effectively increasing the damping in the least stable lead-lag mode. When a motion is stable, turbulence contributes to random fluctuation from the average system response. Under a trim condition, which suppresses the first harmonics in flapping, the effect of turbulence, as measured by the standard deviation of system response, is of the same order of magnitude as the second harmonics in the deterministic (i.e. an idealized turbulence-free) solution. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1984
- Accession Number
- ADA146312
Entities
People
- J. E. Prussing
- Y. K. Lin
Organizations
- University of Illinois Urbana–Champaign