Calculation of the static forces acting on ACV bag-finger skirts
Abstract
A mathematical model of the geometry formation of an ACV bag-finger skirt is developed to determine skirt shape and its deflection for varying cushion pressures, and calculations for the reactions of supports of the rigid structure on the skirt at the inner and outer attachment points are obtained. The model assumption that the finger triangle of the two-dimensional bag-finger skirt turns around the inner attachment point with changing ratio of cushion pressure to bag pressure is confirmed by experiments using skirt rigs. Good agreement is found between theoretical and experimental results, and it is shown that when the cushion pressure is changing, the pressure ratio is the essential dimensionless parameter for the skirt geometry formation and its deflection, and for the forces acting on it.
- Publication:
-
1985 Joint International Conference on Air Cushion Technology
- Pub Date:
- 1985
- Bibcode:
- 1985act..conf...16X
- Keywords:
-
- Ground Effect Machines;
- Skirts;
- Aerodynamic Forces;
- Frequency Response;
- Mathematical Models;
- Engineering (General)