Jii.-ipiT, N.H., "A Thporotiral Approach to the Problem 

 of Critic-nl Whirling Spoods of Shaf(-Disk Systoms," DTMB 

 Kopori Sl'T, Docomhor 1954. 



In this report a number of theoretical methods are derived for 

 .omputing the natural frequencies of whirlinR vibration of shaft-disk 

 systems including the consideration of rotatory inertia, gyroscopic 

 precession, and flexibility of shaft supports, as well as lumped and 

 distributed masses. 



Ja.-pcr, N.H., "Slruclurnl Vihralion Problems of Ships- 

 A Study of the DD 692 Class of Destroyers," DTMB 

 Report C-3ti, February 1950. 



An investigation was made to determine the sensitivity of this 

 class to first order unbalanced forces. The long light hull was found to 

 be lacking in torsional and flexural rigidity compared to other ship types. 

 It was recommended that diagonal stiffeners be installed in the hull 

 girder and that the specifications for straightness and balance of shaft- 



Jasper, N,H., "Vibration Survey of the USS MIDWAY 

 (('\ B 41) Condueled During Ship Trials of July and August 

 mU," DTMB Report B90, March 1948. 



A vibration survey was made to determine the ship's vibration 

 characteristics with three- and four»bIaded propellers. Three-bladed 

 propellers were better as far as machinery vibration was concerned 

 ahd four bladed were better as far as hull vibration was concerned. The 

 Mbration of the outboard propulsion units was acceptable under both 

 conditions, so the author recommends three-bladed propellers on the 

 inboard shaft, and four on the outboard shafts. 



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

 \ ilirations of Marine Propulsion-Shafting Systems," DTMB 

 Rcpon loss, No\ ember 19.56. 



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

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

 t.j adjust the critical frequencies or select the number of blades for the 

 propeller so as to minimize the effects of resonance. Also blade clear- 

 ance, appendage design, and thrust bearing foundation effects are 

 considered as factors to be considered in design. 



Kennard, E.H,, "Some Cases of Vibration Forced by 

 Base Motions or by External Forces," DTMB Report 1394, 

 December 1960. 



This report gives formulas for the response of selected simple 

 vibratory systems to either forced motions of their supports or to 

 external forces. The systems treated include a sprung mass, a sprang 

 rotor, a cantilever beam, and a general elastic system attached to a 

 rigid base. 



Kaiz, L., "Mathematical Analysis and Digital Computer 

 Solution of Natural Frequencies and Normal Modes of Vibra- 

 tion for a Compound Isolation Mounting System," DTMB 

 Report 14H0, January 1961. 



The mathematical analysis and solution of the natural frequen- 

 r i.-s and normal modes of vibration for a compound isolation mounting 

 system by McGoldrick's method are discussed. The system consists 

 of an assembly supported by a set of isolation mountings carried by a 

 . radio which is, in turn, supported by another set of isolation mount- 

 ings attached to the hull of a ship. 



Kinsey, C.H., 'Underway Vibration Survey of the Hull 

 and Propulsion System of the USS DEALEY (DE 10(16)," 

 DTMB Report 980, August \9Rr>. 



Records of vertical and athwartship vibration were obtained at 

 the bow and at the stem, and of fore-and-aft vibration at the thrust 

 bearing and reduction gear housings. 



Kinsey, C.H., "Vibration Characteristics of Main 

 Propulsion Unit in USS GUAVINA (AGSS 362)," DTMB 

 Report 1168, October 19.57. 



Resonant frequencies and amplitudes of vibration of the resili- 

 ently mounted bedplate of the main propulsion unit were determined on 

 GUAVINA during vibration-generator tests at dockside, during underway 

 tests, and during vibration-generator tests with the submarine submerged. 



Kinsey, C.H., "Vibration-Generator Tests of Main 

 Thrust Bearing Foundations on USS FORRESTAL (CVA59)," 

 DTMB Report 9.54, March 1955. 



A vibration-generator test was conducted on the starboard main 

 thrust bearings and their foundations aboard the USS FORRESTAL 

 (CVA 59), while the shafting was disconnected on both sides of the 

 thrust bearinRS, to determine experimentally the lowest resonance 

 frequencies of these systems with the aim of estimating the longitudinal 

 spring constants of the foundations, which were calculated to be 

 8.2 X 10^ lb/in. and 8.9 x 10^ lb/in. 



Lewis, F,M. and Tachmindji, A.J,, "Propeller Forces 

 Exciting- Hull Vibration," Trans SNAME, Vol 62, 1954. 



This paper outlines the methods used in measuring the various 

 types of vibratory forces on models and full scale vessels, and presents 

 experimental results obtained from models which include such effects 

 as fpm, axial and tip propeller clearances, presence of rudder and 

 rudder-propeller clearances. 



Lewis, F.M,, "Propeller Testing Tunnel at the Massa- 

 chusetts Institute of Technology," Trans SNAME, 1939- 



This paper describes the construction and characteristics of the 

 MIT propeller testing tunnel and its instruments. The test chamber is 

 48 "in diameter and water can be pumped through it at up to 33 feet 



Lewis, F.M., "Propeller Vibration," Trans SNAME, 

 1935 and 1936. 



As a result of tests on a model of the PRESIDENT HOOVER 

 the vibration generating forces of blade frequency were divided into 

 three types of forces, listed in order of magnitude: bossing forces, 

 hull suction forces, bearing forces. 



Lewis, F.M., "Propeller-Vibration Forces," Presented 

 at 71st SNAME Meeting, N.Y., 14 November 1963. 



The total force exciting vibration in a ship whether vertical, 

 horizontal or a couple, is the vector sum of a number of separate 

 contributions, generated in diverse manners. The paper represents an 

 attempt to estimate the magnitude of these separate contributions. 



Lewis, F.M., "Vibration and Engine Balance in Diesel 

 Ships," Trans SNAME, 1927- 



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