Feasibility of Six-Degree-Of-Freedom Gem Model Testing in the David Taylor Model Basin Maneuvering and Seakeeping Facility

摘要

Results of investigation of six-degree-of-freedom dynamic GEM model, tested in DTMB Maneuvering and Seakeeping (MASK) Facility over random seas of various states, are presented Primary purpose of investigation was to study feasibility of six-degree-of-freedom GEM model testing in this facility. Data were obtained using a plenum-type submerged sidewall model employing flexible cloth 'skirts' for bow and compartmentation seats, and propelled by air escaping under aft flaps. Performance characteristics are evaluated in terms of kinetic energy of escaping air and model speed Seakeeping characteristics are evaluated in terms of root-mean-square accelerations. With some qualifications, it is concluded that tests of this type are feasible and useful. (Author)