The Natural Frequencies and Mode Shapes of Cables With Attached Masses

[+] Author and Article Information
S. S. Sergev

Civil Engineering Laboratory, Naval Construction Battalion Center, Port Hueneme, Calif. 93043

W. D. Iwan

California Institute of Technology, Pasadena, Calif. 91125

J. Energy Resour. Technol 103(3), 237-242 (Sep 01, 1981) (6 pages) doi:10.1115/1.3230844 History: Received October 17, 1980; Online October 22, 2009


An algorithm has been developed to calculate mode shapes and natural frequencies of taut cables with attached masses. The transcendental equations of motion are solved by an iterative technique allowing accurate calculation of extremely high mode numbers. The algorithm has been implemented as a FORTRAN program primarily as a tool in determining drag coefficients of strumming cables. To assess the accuracy of the program a simple experiment was conducted to determine the natural frequencies and mode shapes of a wire with attached masses driven sinusoidally by a shaker. The algorithm shows close agreement with the experimental data.

Copyright © 1981 by ASME
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