ANALYSIS COMPUTER PROGRAM

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$49,666.00
Award Year:
1986
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
3717
Agency Tracking Number:
3717
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2200 Fuller Rd, Ann Arbor, MI, 48105
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
STERGIOS LIAPIS
(313) 665-6300
Business Contact:
() -
Research Institution:
n/a
Abstract
THE INTENTION IS TO DEVELOP A NUMERICAL METHOD TO ASSESS THE SEAKEEPING CHARACTERISTICS OF A SURFACE-EFFECT SHIP (SES). THIS WOULD RESULT IN A COMPUTER PROGRAM WHICH PROPERLY CONSIDERS THE UNIQUE COMPLEXITIES OF AN SES. THE COMPLEXITIES INCLUDE, BUT ARE NOT LIMITED TO, THE HYDRODYNAMICS, THE AERODYNAMICS, THE CRAFT LAYOUT AND SEALS, FAN DYNAMICS AND HEAVE ATTENUATION DEVICES. THE HYDRODYNAMIC PROBLEM WILL BE CONSIDERED USING A LINEARIZED TIME-DOMAIN FORMULATION OF THE NONLINEAR BEHAVIOR OF THE VEHICLE DURING HEAVE, PITCH AND ROLL MOTIONS OVER INCOMING WAVES. WAVE EFFECTS GENERATED BY THE APPLIED PRESSURE DISTRIBUTION AS WELL AS THE SIDEWALLS WILL BE CONSIDERED. AIR COMPRESSIBILITY WILL BE TAKEN INTO ACCOUNT BY CALCULATING THE CHANGE IN DENSITY DUE TO THE CHANGE IN PRESSURE USING AN ADIABATIC ISOTROPIC RELATIONSHIP. FORMULATION OF THE PROBLEM WILL BE GENERAL SUCH THAT ANY FORM OF SES MAY BE CONSIDERED. FAN DYNAMICS WILL BE INCLUDED USING A QUADRATIC RELATIONSHIP BETWEEN PRESSURE AND VOLUME FLOW. HEAVE ATTENUATION DEVICES (VENT VALVE OR VARIABLE-INLET-GUIDE VANE TYPE) WILL BE CONSIDERED BY CHANGING THE APPLIED PRESSURE OR FAN PRESSURE FLOW CURVES. THE PRODUCT OF THIS PROJECT WILL BE THE SPECIFICATIONS OF A COMPUTER PROGRAM CAPABLE OF ACCURATELY PREDICTING HEAVE, PITCH AND ROLL DISPLACEMENTS, VELOCITIES AND ACCELERATIONS OF ANY SES.

* information listed above is at the time of submission.

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