Accession Number : AD0649311

Title :   HYDROFOIL SIMULATION EQUATIONS STUDY: MATHEMATICAL MODEL REPORT: VOLUME III. EQUATIONS AND METHODS FOR SIMULATION OF REALISTIC SEAS,

Corporate Author : BOEING CO SEATTLE WASH ADVANCED MARINE SYSTEMS ORGANIZATION

Personal Author(s) : Farris,W. E.

Report Date : DEC 1966

Pagination or Media Count : 81

Abstract : In anticipation of the growing use by the U. S. Navy of hydrofoils as gun boats, patrol boats, and as antisubmarine warfare craft, a study was initiated to formulate the mathematical models required for simulating the hydrofoil as a pilot-controlled training situation and as a target or own-ship vehicle. This report presents the results of the study. The mathematical formulation was developed in three parts; each part is treated as the topic of a separate volume of the report. Volume III covers the concepts and equations necessary for the mathematical description of realistic seas. The essential wave characteristics of height and orbital particle velocity are described in terms of statistical properties--in particular, power spectral densities. Material presented in the three volumes enables a person to assemble a hydrofoil simulation which will demonstrate craft dynamic behavior during take-off or landing in smooth water, during foilborne maneuvers in smooth water or regular waves, and during foilborne operation on a fixed heading in realistic seas. The limitations inherent in the work at present result mainly from a lack of a complete theoretical or empirical description of foil and strut hydrodynamic characteristics. For future improvements in simulation realism, advancements must be supported in the field of hydrofoil hydrodynamics.

Descriptors :   (*HYDROFOILS, PERFORMANCE(ENGINEERING)), SIMULATION, MATHEMATICAL MODELS, HYDRODYNAMIC CONFIGURATIONS, TAKEOFF, LANDING, DIGITAL COMPUTERS, PITCH(MOTION), WATER WAVES, PHASE SHIFT CIRCUITS

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE