UNCLASSIFIED 



■SECUftlTY CLASSIFICATION OF THIS PAGE (When Data Entered) 





REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



DTNSRDC-82/093 



2. GOVT ACCESSION NO 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and SublllU) 



THE EFFECTS OF HULL PITCHING MOTIONS AND WAVES ON 

 PERIODIC PROPELLER BLADE LOADS 



'W 'H'"GP f ^ 



{ POCUMFNT 



PERFORhlNGORG. REPORT NUMBE 



ORG. REPORT NUMB 



COLLECTION 



7. AUTHORfe; 



Stuart D. Jessup 

 Robert J. Boswell 



8. CONTRACT OS GRANT NUME 



PERFORMING ORGANIZATION NAME AND ADDRESS 



David W. Taylor Naval Ship Research 

 and Development Center 

 Bethesda, Maryland 20084 



10. PROGRAM ELEMENT PROJECT, TASK 

 AREA a WORK UNIT NUMBERS 



Task Area S0379-SL001 



Task 19977 



Work Unit 1544-350 



II. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Sea Systems Command (05R) 



Ship Systems Research and Technology Group 



Washington, D.C. 20362 



12. REPORT DATE 



September 1982 



13. NUMBER OF PAGES 

 62 



14 MONITORING AGENCY NAME & ADDRESSCy/ dlllerent Irom Controlling Ollice) 



Naval Sea Systems Command (56X4) 

 Propulsion Lineshaft Equipment Division 

 Washington, D.C. 20362 



IS. SECURITY CLASS, (ol this report) 



UNCLASSIFIED 



16. DISTRIBUTION STATEMENT (ol this Report) 



APPROVED FOR PUBLIC RELEASE: DISTRIBUTION UNLIMITED 



17. DISTRIBUTION STATEMENT (of the abstract entered In Block 20, It dlllerent Irom Report) 



18. SUPPLEMENTARY NOTES 



Presented at the Fourteenth Symposium on Naval Hydrodynamics, The 

 University of Michigan, Ann Arbor, Michigan, 23-27 August 1982. 



KEY WORDS (Continue on reve 



Marine Propeller 



Loads 



Propulsion 



Model Experiments 



Propeller Research 



aide II neceaaary and identity by block number) 



Unsteady Loads 



Waves 



Dynamic Pitching 



ABSTRACT (Continue on reverse side it necessary and identity by block number) 



Fundamental investigations were made of the effects of periodic hull 

 pitching motions and waves on the periodic loads on propeller blades and 

 bearings. These periodic loads were measured during carefully controlled 

 model experiments in which the periodic hull pitching motions, regular waves, 

 and relative phase of the hull pitching to the wave encounter were system- 

 atically and independent]. y v.aried. The periodic blade loads were calculated 



(Continued on reverse side) 



DD 



1473 



EDITION OF 1 NOV 65 IS OBSOLETE 



S/N 0102-LF-014-6601 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Bnlared) 



