3. MACHINERY REPORTS 



Allniitl, R.B., "\ ibration Survey of the USS CORAL 

 SEA (C\B 43) Conducted during Ship Trials, " DTMB 

 Report C--J68, October 1949. 



This vibralion survey was made to detemiine the vibration 

 characteristics of the hull and machinery with different propellers and 

 to determine the effect of various bottom paints on the inflow to the 

 propellers and thereby effecting the ships vibration. It was found that 

 foui-bladed propellers outboard and five inboard was the best arrange- 

 ment, and that the effect of different bottom paints was negligible. 



Be:it, S,G., "Propeller Balancing Problems," SAE 

 Journal, November 1954. 



Broslin, J.P,, "A Theory for the Vibratory Effects 

 Produced b\ a Propeller on a Large Plate," Journal of 

 Ship Re.-^earch, Vol. 3, No. 3, December 1959. 



a shaft parallel to the pla 

 The vibratory forces of i 

 cussed for conditions of 



1 single-bladed propeller 



1 and multiblade 



Breslin, J.P. and Tsakonas, S., "Marine Propeller 

 Pressure Field Due to Loading and Thickness Effect," 

 Trans SNAME, Vol. 67, 1959. 





ents the blade-fre 

 of torque and thn 

 er had not been a( 

 ^ compared to expt 



mcy pressure field of a 

 loading, and blade thick- 

 unted for previously. 



Breslin, J.P,, "Review and Extension of Theory for 

 Near-Field Propeller Induced Vibratory Effects," 

 Presented at Fourth Symposium on Naval Hydrodynamics, 

 V\ashington, D. C, August 1962. 



A review of the theoretical studies of ship propeller induced 

 pressures and forces on nearby boundaries in the last decade is given 

 with emphasis only on principal results. Simple formulas are developed 

 for the blade frequency vibratory force. 



Breslin, J. P., "Ship Vibration, Part I - Propeller- 

 Generated Excitations," Applied Mechanics Review, 

 \ol. 13, No. 7, 1960. 



us paper presents the sti 

 effects and vibratory thn 



■ of knowledge of blade frequency 

 : and torque. 



Broslin, J.P. and Tsakonas, S., "The Blade Frequency 

 \'elocity Field Near an Operating Marine Propeller Due to 

 Loading and Thickness Effects," Sixth Annual Conference 

 on Fluid Mechanics, University of Texas, 1959. 



ity flue 



of each of the 

 ; blade thickne 

 vn to be of prir 



s due to loading and blade thickness 

 lity of a propeller operating in open 

 !ssible ideal fluid are determined. 

 ; to the relative magnitudes of the 



menls to the 

 effect on the 



and velocity 



Breslin, J.P., "The Pressure Field near a Ship Propel- 

 ler," Journal of Ship Research, Vol. 1, No. 4, March 1958. 





A brief 



summi 



ary is givei 



n of effort 



tectun 



e on the 



probU 



■m of deter 



mining thi 



produc 



:ed by a 

 nade by 



ship t 



iropeller, a 



nd an ace 



tions 1 



autical res 



earchers t 



fluctui 



ating pre 



■ssure 



field near 



a propelU 



presst 



ire field 



are di 



scussed bi 



■leny. 



nputing the 

 itics of the 



Breslin, J.P., "The Unsteady Pressure Field Near a 

 Ship Propeller and the Nature of the Vibratory Forces Pro- 

 duced on an Adjacent Surface," Stevens Institute of Tech- 

 nology, Experimental Towing Tank Report 609, 1956. 



calculations were for the 

 clearances behind the voi 

 of the vortex, or clearanc 



Forces on a flat plate wer 

 single-line vortex passed the pla 

 dimensional problem. Results si 



between hull and propeller are m< 

 propeller and rudder. 



Bryant, F.B., "Alternating Bending Stresses in the 

 Shaft of a 110-Foot Submarine Chaser," DTMB Report 

 R-187, March 1944. 



In tests aboard r 



110-foot subchaser, altem 



ating strai 



' a propeller shaft were mea 



isured und< 



;tresdes of 500 psi or less. 



The appa 



;ribed. 





Buchmann, E. and Jasper, N,H,, "Vibration Measure- 

 ments on Port Propulsion System of USNS POINT 

 BARROW (T-AKD 1)," DTMB Report 1286, December 

 1958. 



Vibrations were measured to determine the cause of an engine 

 casualty. Large torque variations of the propeller shaft occurred at 

 very low rpm and generated thrust variations. These vibrations are 

 probably self-excited by large binding forces at the shaft bearings. 

 Vibration resonances at turbine and double-turbine frequencies 

 occurred at the turbine housing at about 140 shaft rpm and are 

 probably excited by unbalance in the turbine system. 



Buchmann, E. and Birmingham, J,T,, "Vibration 

 Survey on U.S. Army Ship LT COL JOHN U.D. PAGE 

 (BDL-IX)," DTMB Report 1343, July 1959. 



A vibration survey was conducted on this ship to ascertain the 

 cause of excessive vibration of bulkheads bounding the aft ballast 

 tanks in the area of the shaft alleys. 



Elmer, G.D., "Design Formulas for Yielding Shock 

 Mounts," DTMB Report 1287, January 1959. 



Design formulas are given for both the elastic characteristics 

 and the plastic limit loads for three different configurations of yield- 

 ing shock mounts. In addition, the behavior of these mounts is 

 discussed, and a sample design computation is carried out. 



Feldman, S., "Dynamic Balancing for Noise 

 Reduction," Department of Navy, Bureau of Ships R&D 

 Report 371-V-24, April 1955. 



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