ON THE PREDICTION OF ACCELERATION RESPONSE OF AIR CUSHION VEHICLES TO RANDOM SEAWAYS AND THE DISTORTION EFFECTS OF THE CUSHION INHERENT IN SCALE MODELS

The heave, pitch and roll equations of motion for an Air Cushion Vehicle are derived. The dynamic response to a random seaway is predicted from the linearized perturbation equations and compared with experimental tests of a subscale dynamically similar model operating in a towing tank. Frequency domain seakeeping analysis to determine acceleration response, frequency of bow slamming, structural loads, and relative motion between two craft is demonstrated. Because the atmosphere is not scaled during subscale model tests, an appreciable dynamic distortion is reflected in lift system physical parameters. This scaling problem is discussed and avenues of further subscale model experimental research are suggested.

• Supplemental Notes:
  • Presented at AIAA/SNAME/USN Advanced Marine Vehicles Meeting, Annapolis, Maryland, July 17-19, 1972
• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • Lavis, D R
  • Bartholomew, R J
  • Jones, J C
• Publication Date: 1972-7

Media Info

• Features: References;
• Pagination: 22 p.

Subject/Index Terms

• TRT Terms: Air cushion vehicles; Perturbations; Seakeeping; Ships; Structural models
• Uncontrolled Terms: Ship models
• Old TRIS Terms: Perturbation problems
• Subject Areas: Bridges and other structures; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00035183
• Record Type: Publication
• Source Agency: American Institute of Aeronautics and Astronautics
• Report/Paper Numbers: 72-598
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM