Access the full text.
Sign up today, get DeepDyve free for 14 days.
Loading next page...
/lp/emerald-publishing/a-theoretical-method-for-calculating-flexure-and-stresses-in-t9WmoyaZk8
References
References for this paper are not available at this time. We will be adding them shortly, thank you for your patience.
- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0002-2667
- DOI
- 10.1108/eb033981
- Publisher site
- See Article on Publisher Site
Abstract
A variational procedure is developed, in the form of an extension of the RayleighRitz method, leading to a rapid estimation of the flapwise vibration modes and frequencies of a helicopter rotor blade. The initial data required are the blade mass and stiffness distribution and the angular velocity of the rotor blade. The normal modes and frequencies are subsequently used to determine blade shapes in flight. The aerodynamic forces only enter at a late stage of the analysis, and the effect of differing flight conditions is readily assessed. The method makes extensive use of matrix formulation and particularly lends itself to electronic computation techniques. A numerical example is given for the special case of constant spanwise blade mass distribution, although the method may readily be extended to cover this restriction. The bending moment distribution is also worked out, and flexible and rigid blades are compared.
Journal
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1965