Panufjopulos, E,P. and Nickerson, A.M., "Propoller 

 Shaft Siri'.-ssos undor Service Conditions," SNAME, 1954. 



Pan I of Ihis paper is devoted to a review of shaft loading and 

 vibratory betiavior contribytinK to bending stress variations. Part 2 

 deals with an experimental tailshaft bending stress investigation on 

 the 20,000 ton tanker CHRYSSI. 



Pavlonko, G.E., "A Method of Calculating Ships' 

 \ibralion Frequencies," Engineering, June 1926. 



Pien, P.C. and Ficken, N.L., "The Measurement of 

 Propeller-Induced Vibratory Forces on Scale Ship Models," 

 Paper presented at ATTC Conference, Septeinber 1959. 



An improved technique of measuring model vibratory forces has 

 been developed, involving elastic isolation of the model stem. This 

 paper is intended to describe the new model test method. Some model 

 results obtained for a series of stem variations based on Series 60 

 using these techniques are included by way of illustration. 



Plumpe, David J., "A Ship Propel ler-Shaft Strain- 

 Measuring and Telemetering System," DTMB Report 1714, 

 Januarv 1963, 



Price, Richard L., "The TMB 40,000-Pound, Three- 

 Mass Vibration Generator, Its Description and Operation," 

 DTMB Report 1771, November 1903. 



This vibration generator, designed to excite vibrations in large 

 structures, is capable of generating forces of up to 40,0(X) pounds and 

 moments up to 120,000 ft-lbs over a frequency range from 0.6 to 20 cps. 

 This report describes the mechanical and electrical parts of the gener- 

 ator and the principle of operation. 



Price, Richard L„ "The TMB 5,000-Pound, Three- 

 Mass Vibration Generator, Its Description and Operation," 

 DTMB Report 1781, December 1963. 



This vibration generator, designed to excite vibrations in large 

 structures, can generate forces up to 5,000 lbs and moments up to 

 8,500 ft-lbs over a frequency range from 0.42 to 33.3 cps. This report 

 describes the mechanical and electrical parts of the system and gives 

 detailed operational instructions. 



Price, Richard L., et al., "Bending and Torsional 

 Stresses in Propeller Shaft of USS OBSERVATION ISLAND 

 (EAG 154) in Smooth and Rough Sea," DTMB Report 1596, 

 June 1962. 



This report describes a telemeter system for obtaining simultan- 

 strain data from five gage locations on a ship's rotating propeller 



Pode, Leonard, "The Determination of Frequency 

 Respon,-e from Test Results That .Are of Short Duration 

 and Not Precisely Periodic," DTMB Report 926, June 1955. 



Consideration is given to the problem of determining frequency 

 response from tests of relatively short duration, under conditions in 

 which the periodicity of the input and output functions maybe somewhat 

 disturbed by such factors as the presence of a decaying transient or the 

 influence of stochastic variables. A method of analysis is proposed 

 ■.vhich involves the evaluation of "moving average" Fourier coefficients. 



Polachek, H., "Calculation of Transient Excitation of 

 .~^hip Hull- by Finite Difference Methods," DTMB Report 

 1120, Jul> 19.')7, 



A system of finite difference equations based on the nonuniform 

 beam theory is presented for use in the calculation of the response of a 

 ship hull to transient forces. The conditions for stability of these 

 equations are derived. The feasibility of the method is tested by the 

 solution of a vibration problem for a specific hull discussed in DTMB 

 Report 1119. 



Price, Richard L., "Stern Area Vibration Measurements 

 on LSS OBSERV.ATION ISLAND (EAG 154)," DTMB 

 Report 1595, January 1962. 



Vertical, athwartshipa. and fore-aft vibrations were measured at 

 the stem under calm and rough-water conditions with the ship underway. 

 The principal components of observed vibrations were at propeller 

 blade and double blade frequencies. Experimental and calculated 

 results show good correlation. 



Price, Richard L., "The David Taylor Model Basin 

 Two-Component Pallograph," DTMB Report 1730, May 

 196 3, 



uple 



: dev 



The pallograph described in this report i 

 designed and developed at DTMB. The instrument's characteristics and 

 capabilities are mentioned and a complete alignment and operating 



During 1960, tests were conducted to check the adequacy of the 

 existing propeller shaft of this ship. The bending and torsional stresses 

 obtained for this shaft are evaluated, and bending stresses are compared 

 with results obtained on other vessels. The report includes a harmonic 

 analysis of bending stresses, a comparison of measured values with 

 theoretical bending stresses computed from wake survey data, and 

 suggestions for future work. 



Prohl, M.A., "A General Method for Calculating Critical 

 Speeds of Flexible Rotors," Journal of Applied Mechanics, 

 Vol, 12, No. 3, September 1945, 



The actual rotor is simulated by a rotor in which the mass is con- 

 centrated at several equally spaced stations. The masses are consid- 

 ered to be connected by weightless flexural members. 



Reed, F.E. and Bradshaw, R.T., "Ship Hull Vibration, 

 Part II-The Distribution of Exciting Forces Generated by 

 Propellers," CONESCO Report F- 101-2, Contract Nobs 

 77150, June 1960. 



This paper presents a practical i 

 components of force and the three comp 

 with the water-inertia effects included. 



ethod of computing the three 

 nents of moment on a propelle 



Ritger, P.D. and Breslin, J. P., "A Theory for the 

 Quasi-Steady and Unsteady Thrust and Torque for a 

 Propeller in a Ship Wake," Experimental Towing Tank, 

 Stevens Institute of Technology, Report 686, July 1958. 



Unsteady aerot 

 [ and torque expe 



lie theory is applied to the problems of varyii 

 ed by a marine propeller working in a non- 



Robinson, Donald C, "Calculated Natural Frequencies 

 and Normal Modes of Vibration of the USS OKINAWA 

 (LPH 3)," DTMB Report 1766, August 1963. 



Normal mode shapes and natural freque 

 zontal, and coupled torsion-horizontal uibratio 

 hull. The calculated natural frequencies for a 

 vertical and horizontal vibration are compared 



cies of vertical, hori- 

 were calculated for the 

 leavy displacement for 

 'ith experimental result; 



69 



