JasptT, N.H, and Chruch, J,W., "Structural Soaworthi- 

 iii'ss Studios," Prospntcd nt Spring Mooting, SNAME, April 



Ihis paper eiv.'S a 

 sullK of full-scale si 



1950 wilh empha 



Juspor, Norman H, and Birmingham, John T., "Sea 

 Tosts of iho rSCGC I'NIMAK, Part 1 - Gonora) Outline 

 of Tests and Tost Results," DTMB Report 976, March 

 llir.li. 



Measurements of ship motions, hull girder stresses, bottom 

 pressures, stresses in the bottom structure incident to slamming and 

 sterophoto^iraphs of the sea were obtained under a wide variety of sea 

 conditions, ship speeds, and headings relative to the waves. This 

 report outlines the scope of the tests and presents the data in some 

 detail, 



Jasper, N.H. and Birmingham, J.T., "Strains and 

 Motions of ISS ESSEX (CVA 9) during Storms near Cape 

 Horn," DTMB Report 1216, August 1958. 



Strains, ship motions, and wave heights were measured on the 

 ESSEX in very rough seas. The results, together with the damage to 

 the TICONDEROGA under similar conditions, indicate inadequate 

 buckling strength in parts of the hanger deck. When the bow flare is 

 immersed, the large hydrodynamic forces involved cause a vertical 

 whipping and high stresses. The report recommends strengthening the 

 main deck longitudinals and considering whipping stresses in design, 



Jasper, N.H, and Brooks, R.L., "Sea Tests of the 

 rSCGC INIMAK, Part 2 - Statistical Presentation of the 

 Motions, Hull Bending Moments, and Slamming Pressures 

 lor Ships of the AVP Tvpe," DTMB Report 977, April 1957. 



Based on extensive measurements, the motions and hull-girder 

 bending moments which a ship similar to the UNIMAK may be expected 

 to experience over a wide range of operating conditions are presented 

 in statistical form. Formulas are given for use in estimating probable 

 maximum values of moments and motions. 



Jasper, N.H., Brooks, R.L., and Birmingham, J.T., 

 Staiisiical Presentation of Motions and Hull Bending 

 Moments of ESSEX-Class Aircraft Carriers," Revised 

 Edition, DTMB Report 1251, June 1960. 



The motions and longitudinal hull bending moments which ships 

 of the ESSEX Class may be expected to experience over a wide range 

 of operating conditions are presented in statistical form, based on 



■ Kiven for us 



on VALLEY FORGE and ESSEX. Formula 

 mating probable extreme values of moments 



Ja-por, N.H. and Rupp, L.A., "An Experimental and 

 Thoorotical Investigation of Propeller Shaft Failures," 

 Tran- SNAME, 19.52, 



suit of the high I 



e of tail shaft failures the inve 

 Kation reported here was undertaken. Tests of a tanker and theore 

 considerations lead the authors to make specific recommendations 

 design procedure, operating procedure, and future research. 



Jasper, N.H. and Wigle, B.M., "Motions of the 

 SS SILVER MARINER in a State 5 Sea," DTMB Report 

 1067, October 1956. 



Tests were made to determine the roll, pitch, and heave motions 

 that this type vessel would experience in a State 5 sea for various 

 speeds and headings. The largest values of motion during the tests 

 are given, as well as the probabilities of exceeding a given magni- 

 tude of ship motion for various combinations of speed and heading, 



Kane, J.R. and McGoldrick, R.T., "Longitudinal 

 Vibrations of Marine Propulsion-Shafting Systems," 

 Trans SNAME, vol, 57, 1949, Al.so DTMB Report 1088, 

 November 1956. 



This paper shows that by a systematic analysis of the longi- 

 tudinal mass-elastic system of a propulsion system, it is often possi- 

 ble to adjust the critical frequencies or select the number of blades 

 for the propeller so as to minimize the effects of resonance. Also 

 blade clearance, appendage design, and thrust bearing foundation 

 effects are considered as factors to be considered in design. 



Kapiloff, E., "Calculation of Normal Modes and Natural 

 Frequencies of Ship Hulls b,v Means of the Electrical 

 Analog," DTMB Report 742, July 1954, 



The electrical analog for the transverse vibration of a nonunifomi 

 beam with both shear and bending flexibility is reviewed to illustrate 

 the general method of development of such a network. Inasmuch as the 

 dynamics of transverse vibration of a nonunifomi beam with shear and 

 bending flexibility are those for the flexural vibration of a ship hull 

 considered as a free continuous, nonuniform beam, the practical 

 application of the analog is shown by presenting the nornial modes of 

 vibration of a naval vessel. 



Kapiloff, E, and Birmingham, J.T,, "A Report on Hull 

 Vibration Measurements Made on the SS BETHLEHEM and 

 Vibration Generator Tests Made on the SSCA PAUL and 

 the SS PERE MARQUETTE 21 while in service on the 

 Great Lakes," DTMB Report 848, March 1953. 



As part of the general program of extension of hull vibration 

 theory to all classes of ships, this report describes tests made on 

 three Great Lakes vessels and compares the experimental results with 

 the computed values made according to the methods presently consid- 

 ered to be moat satisfactory. 



Kaplan, P., "A Study of the Virtual Mass .Associated 

 with the Vertical Vibration of Ships in Water," SIT, 

 Davidson Laboratory, Report 734, December 1959. 



A survey of the available theoretical and experimental studies 

 related to the virtual mass of bodies vibrating on the free surface of 

 watrr is presented. Comparison of theoretical and experimental results 

 shows disagreement, the theoretical values being greater. This leads 

 to errors in the calculation of the natural frequencies of vibration of 

 ships. The effects of gravity wave formation, compressibility, viscosity, 

 wall effects, and other physical mechanisms usually neglected are 

 considered. Their influence does not improve the agreement. 



Kennard, E.H., "Forced Vibrations of Beams and the 

 Effect of Sprung Masses," DTMB Report 955, July 1955. 



Certain aspects of beam vibrations are discussed which throw 

 light upon particular features of ship vibration. These aspects are: 

 Antiresonances and effects of damping in forced vibrations, explicit 

 formulas being given for unifomi beams, internal versus external damp- 

 ing; effects of sprung masses on natural frequencies; and forcing 

 functions resulting from sprung masses. 



63 



