Abstract
The mechanism of the helicopter rotor whirl instability in the forward flight is investigated by the parametric resonance analysis. By comparing the system natural frequencies with the frequency components of the aerodynamic forces that are observed in the SH-60K simulation, it is shown that the particular frequency components might cause the parametric resonance. By applying the aerodynamic forces with the particular frequencies to the right-hand side of the equations of motion, the method of the variation of constants is used to evaluate the parametric resonance. These results show that the parametric resonance between the backward whirl mode and the scissor mode makes the SH-60K whirl mode unstable. In order to suppress the whirl instability, the reduction of the rotor rotational speed or the stiffening of the rotor support structure is considered to be effective.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Society for Aeronautical and Space Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
