Unclassified 



CLAS5IFICA 



»GE (When Dais En 



REPORT DOCUMENTATION PAGE 



REPORT NUME 



TN-1608 



2, GOVT ACCESSION NO 



DN787011 



TITLE fend Sutl/dsJ 



THE STRUMMING VIBRATIONS OF MARINE 

 CABLES: STATE OF THE ART 



7. AUTHORfs; 



O.M. Griffin, S.E. Ramberg, R.A. Skop, 

 D.J. Meggitt, and S.S. Sergev 



PERFORMING ORGA 



SID ADDRESS 



Naval Research Laboratory 

 Washington, DC 20375 



MP ADDRESS 



CONTROLLING OFFICE I 



Civil Engineering Laboratory 



Naval Construction Battalion Center 



Port Hueneme, CA 93043 



ilE a AOORESSril 



'^y H Q / 



RECIPIENT'S CA 



i TYPE OF REPORT 



Final, FY 1981 



= ERIOD COVERED 



6 PERFORMING ORG REPOR 



B CONTRACT OR GRANT NUMBERfi) 



CEL Proj. YF59-556-091-01-400 

 NRL Problem 0274-0-1 



REPORT DATE 



May 1981 



198 



15. SECURITY CLASS, fo 



Unclassified 



16. DISTRIBUTION STATEMENT (ul :hia Rcporl) 



This publication is required for official use or for administrative or operational purposes 

 only. Distribution is limited to U.S. Government Agencies. Other requests must be referred 

 to the Civil Engineering Laboratory, Naval Construction Battalion Center, Port Hueneme, 

 CA 93043 



DISTRIBUTION 



ATEMENT fo/ thu abs 



in Block 20, il diller: 



KEY WORDS (Continue on reverse side H necessary and identify by blocl< number) 



Cable strumming vibrations; vortex-excited vibrations; marine cable s ystems; 

 ocean engineering. 



20. ABSTRACT (Conti 



This report discusses recent findings on strumming of cables from the marine cable 

 dynamics research program conducted by the Naval Facilities Engineering Command. 

 Emphasis is placed on an understanding of the basic strumming phenomenon, the devel- 

 opment of design procedures, the definition of hydrodynamic force coefficients applicable 

 in practice, and the specification of structural response parameters relevant to marine cable 

 design. Strumming analysis methods for both taut and slack marine cables are described 



continued 



DD , j°r73 1473 EDITION OF 



' 65 IS OBSOLETE 



Unclassified 



SECURITY CLASSIFICATION OF 



MBL/WHOt 



Q D3D1 D0MD3bb 3 



