Mnlhowson, A.W., "Calculation of Torsional Critical 

 Sppi>ds of Electrirallv Drivpn Propulsion Systems with 

 Flexibly Mounted Planetary Reduction Gears," DTMB 

 Reptirt !)'J7, June 1955. 



alys 



ven for critical treque 

 rin planetary gear prop 

 ire presented. 



Mawby, N., "Vibration Tests on LCU 1621 Equipped 

 «ith a Special Right-Angle Drive Propulsion System," 

 DTMB Report 1634, August 1962, 



This report presents the results of torsional t 

 i performed on LCU 1621 which is propelled by l 

 e drives with a propellei^nozzle combination. 



r vibratio 

 lal right- 



McGoldrick, R.T. and Curtis, W.F., "Analysis of 

 \ ibration in the Propelling Machinery of the Battleships 

 NORTH CAROLINA and WASHINGTON (BB 55 and BB 56),' 

 DTMB Report 518, March 1945. 



Sea trials of two of this class brought attention to excessive 

 axial vibration of their shafts. These results were compared with 

 Lomputed values for various mass-elastic approximations of the propul- 

 sion system. After considering many solutions, the number of propeller 

 blades were increased which brought the vibration down to an acceptable 



McGoldrick, R,T*, "A Theorem on Bending Stresses in 

 Rotating Shaft," DTMB Report 947, June 1955. 



It IS shown that with the exception of the shaft fitted with a 

 two-bladed propeller, the harmonic components of the varying bending 

 stress set up in rotating propeller shafts due to periodic forces or 

 moments acting on the shaft will have the same amplitude regardless 

 of the position of the strain gage on the circumference of the shaft. 



McGotdrick, R.T., "Axial \ibration of Propulsion 

 Syr^tems of Battleships of the BB 57 through 60 Class," 

 DTMB Report 547, January 1948. 



mental data include amplitudes 

 tion of the shafts. The vibratit 

 urbine couplings showed exces 



int freque 



McGoldrick, R.T., "Axial Vibration of Propulsion 

 Systems of Battleships of the BB 61 through 66 Class,* 

 DTMB Report 551, February 1948. 





Axia 



1 vibration data was 



taken 



dun. 



rig sea In 



this I 



:lass. 



The general problei 



71 Of tV 



leaxi 



lal vibrati 



battleships 



is discussed with a 



descr 



iptioi 



n of the V 



invoh 



,ed. in 



eluding the wake va 



riatior 



1 of e 



ach. 



McGoldrick, R.T., "Calculation of Natural Frequencies 

 and Modes of Vibration of Resiliently Mounted Equipment 

 by the INIVAC at David Taylor Model Basin," Department 

 of the Navy, Bureau of Ships Notice 10462, October 1955. 



McGoldrick, R.T., "Calculation of Natural Frequencies 

 and Normal Modes of Vibration for a Compound Isolation 

 Mounting System," DTMB Report 1420, July 1960. 



ormal modes of vibration of a 

 mined. The system consists of an 

 tion mountings carried by a cradle 



The natu 



ral freque 



•ncies 



npound 



mourn 



ting systt 



.mare 



iembly 



suppo 



rted by a 



set of 



ich IS. 



in tur 



n, suppor 



ted by 



ached t 



o the 



hull of a 



ship. 



"Military Standard - Mechanical Vibrations of Shipboard 

 Equipment," MIL-STD 167 (Ships), 20 December 1954. 



This standard establishes the requirements of most naval machin- 

 ery and equipment as regards both internally excited vibrations and 

 externally imposed vibrations. 



Mueller, H.F., "Recent Developments in the Design and 

 Application of the Vertical-Axis Propeller," Trans SNAME 

 Vol 63, May 1955. 



The author revi 



ews past history in Germany and rece 



nt develop- 



in U.S. A disct 



ission of the hydrodynamic principles, 



, and of the 



teristics and me 



!rits of various blade motions is prese 



snted. 



Neifert, H*R. and Robinson, J.H., "Further Results 

 from the Society's Investigation of Tailshaft Failures," 

 Trans SNAME, 1955. 



This paper reports the results of two recent phases of SNAME's 

 continuing investigation of tailshaft failures. As a result of full scale 

 and model tests, the effectiveness of stress-relief design modifications 

 is evaluated, and the bending stresses in tailshafts under various 

 operating conditions is evaluated. 



Noonan, E.F. and Zaloumis, A, "Shipboard Vibration 

 and Noise Considerations in the Design of River Towboats, 

 DTMB Report 1758, July 1963. 



Many problems of vibration and noise aboard ship are identified 

 and those which are of particular concern in the design of river towboats 

 are reviewed. The paper is addressed primarily to the naval architect, 

 shipbuilder, or operator and identifies those areas to which attention 

 should be drawn during design and development. 



Paladino, A,R., "Vibration-Generator Tests of Propul- 

 sion - System Elements on the USS TIMMERMAN (EAG 

 152)," DTMB Report 1016, March 1956* 



Vibration-generator tests were made on the port reduction gear 

 unit, the starboard planetary gear unit, and the hi^ speed shaft. Addi- 

 tional frequency and amplitude data were obtained for use in a general 

 study of propulsion units. 



Paladino, A,R,, "Vibration-Generator Tests of the 

 Propulsion System Reduction Gear Units on the USS 

 FORREST SHERMAN (DD 931)," DTMB Report 1028, 

 April 1956. 



n the starboard and port 

 icoupled. The longitudi- 

 omputed to be 2.9 x 10^ 

 ilitude data were obtained 





Vibration-gene 



rator 



tests \ 



vere made 



reduct 



ion-geai 



r units V 



nth the line 



shafting 



nal ^ 



ring cor 



istants of the 



foundi 



ations are 



and 1. 



6 X 10^. 



Additi 



onal 



f re quel 



icy and ai 



I general study of propuls 





Paladino, A.R., "Vibration Survey of USS DECATUR 

 ■(DD 936)," DTMB Report 1271, March 1960. 



A vibration-generator 

 performed. During the fomit 

 hull, and rudder. Underway 



experienced, but 



surements were made on the propul- 

 vibration of the ship's rudders was 

 :ed by changing the rudder toe-iri. 



75 



