Vnno, Francis F., "Vihralion-Gonorator Tests of the 

 Propul^ion-Svstem Reduction-Gear Unit on the USS DEALEY 

 (DE 1006)," DTMB Report 1038, May 1956. 



A vibration-generator test was perfonned on the reduction-gear 

 unit of the propulsion system with the line shaft uncoupled. The 

 resonant frequency of 660 cpm corresponds with a longitudinal spring 

 constant of the foundation of 1.76 x 10* lb/in. Additional data were 

 obtained for use in a general study of propulsion units and their 

 foundations. 



Ward, L.W., ".Added Mass of Cylinders Representing 

 T>pical Modern Submarine Cross-Sections," Technical 

 Research Group (TRG), Inc., Syosselt, L.I., N.Y., Tech 

 Report 1, Contract Nonr-3090(00) (x), October 1960. 



The cross sections of typical modem submarines in way of the 

 superstructure and/or sail are idealized to a circular arc "bump" and 

 vertical fin combined with a circular main hull. The resulting flow and 

 added mass for vertical and horizontal vibration are calculated. Speci- 

 fic examples are worked out and conclusions drawn. 



Wifjle, Bruce M., "Vibration-Generator Tests on the 

 Propeller Shaft of the USS FORREST AL (CVA 59)," DTMB 

 Report 1007, July 1956. 



A vibration-generator test was conducted on an Alloy 4 propeller 

 shaft installed on the FORREST AL to determine the natural frequencies 

 and modes of lateral vibration. The experimental data are compared 

 with results predicted by theoretical methods. 



Wigle, B.M. and Jasper, N.H., "Determination of 

 Influence Coefficients as Applied to Calculations of 

 Critical Whirling Speeds of Propeller-Shaft Systems," 

 DTMB Report 1050, May 1957. 



Formulas developed at DTMB for computing the critical frequen- 

 cies of whirling shafts require influence coefficients in their applica- 

 tion. This report describes methods of determining the influence 



Wilson, W, Ker, ".A Review of Ship Vibration Problems, 

 Marine Engineering and Naval Architecture, July, August, 

 October, .November 195.5. .Also publi'-he'' in ASNE Journal 

 May 1954. 



Veh, H.Y., "Thrust and Torque Fluctuations for APA 

 249, DTMB Model 4414," DTMB Report 1364, January 

 1960, 



A velocity survey was conducted on Model 4414 to obtain data 

 needed to calculate the thrust and torque fluctuations due to nonuni- 

 form wake-distribution over the propeller disk for the APA 249. 



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