Download or read book LONGITUDINAL VIBRATION OF PROPULSION SYSTEM ON USS CANOPUS AS 34 written by and published by . This book was released on 1967 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an effort to increase the adequacy of prediction methods used in shaft design, a study was made of the longitudinal vibration characteristics of the propulsion system on the USS CANOPUS (AS-34). The lever effect, previously detected on the USS SIMON LAKE (AS-33) was confirmed. This means that the amplitudes of the gear case, turbines, and condenser are roughly dependent on the relative heights of these components to the level of the shaft. The effective foundation mass, foundation stiffness, and thrust-bearing stiffness are computed from the measured response of the system. A resonance was found to exist in the operating range, but it was not considered detrimental. The exciting forces are lower than usual, except at or near full power.
Download or read book LONGITUDINAL VIBRATION OF PROPULSION SYSTEM ON USS SIMON LAKE AS 33 written by and published by . This book was released on 1966 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements were made on the propulsion system of the USS SIMON LAKE (AS-33) in February 1965 as part of a program to improve analysis procedures used by the Navy for predicting the longitudinal vibration of shaft propulsion systems. The objectives were to find the axial exciting forces and damping associated with the propulsion system of this ship, as well as to determine how the gear case, turbines, condenser, and machinery foundation affect longitudinal vibration. Alternating thrust in the shaft and longitudinal displacement of the gear case, low-pressure turbine, condenser, and machinery foundation were measured. A resonance was found to exist in the operating range, but it is not considered detrimental. The gear case, turbines, and condenser move essentially as one unit. A mass-elastic system derived from measured data includes a level effect acting on the foundation mass. The exciting forces are lower than usual, except at or near full power.
Download or read book Report David W Taylor Model Basin written by David W. Taylor Model Basin and published by . This book was released on 1967 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by Defense Documentation Center (U.S.) and published by . This book was released on 1967 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1967-07 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research and Development Reports written by and published by . This book was released on 1967 with total page 1150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1967 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Developments in Longitudinal Vibrations of Surface Propulsion Systems written by A. Zaloumis and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1967 with total page 1182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1967-07 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration Measurements of the Hull Tripod Mast Propulsion System and Rudder System of Uss Austin lpd 4 written by Nicholas Huzil and published by . This book was released on 1967 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural hull frequencies in vertical and athwartship direction and in rotation were identified. Vibration amplitudes did not exceed 2.5 mils during steady-speed runs and were below 12 mils during maneuvers. Vibration levels for all test conditions are not considered excessive. Natural frequencies of the tripod mast were measured, and amplitudes at the highest radar platform were found to be below 36 mils during steady-speed runs and below 44 mils during maneuvers. Critical speeds of the propulsion system for longitudinal vibration occurred at 132 and 174 rpm for the starboard and port shafts, respectively. When the ship was on a steady course, the levels of longitudinal vibration, alternating thrust, and alternating torque in the propulsion system were low even at critical speeds. The alternating thrust increased considerably when the ship was in a hard left turn at or near 174 rpm or in a hard right turn at or near 132 rpm. Variable torque in the propulsion system was satisfactorily low--less than 2 percent of the mean torque. A torsional shaft critical at 2.3 Hz was excited by blade frequency only at very low power. Motor current surges in the steering gear system exceeded the design limit at high speeds. Surges at the port motor were higher than at the starboard motor. Pressures in the hydraulic ram cylinders were below design pressure. (Author).
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1967 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Vibration Data Sheet s 6 10 written by Society of Naval Architects and Marine Engineers (U.S.) and published by . This book was released on 1966* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Vibration Data Sheet 1 written by Society of Naval Architects and Marine Engineers (U.S.) and published by . This book was released on 1966* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Vibration Data Sheet s 1 5 written by and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ship Vibration Data Sheet s 6 10 written by and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
