Effects of mooring line drag damping on response statistics of vessels excited by first- and second-order wave forces
✍ Scribed by A. Sarkar; R. Eatock Taylor
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 273 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0029-8018
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✦ Synopsis
The drag-induced damping in a mooring cable due to combined first-and second-order wave excited motion of a moored vessel has been determined by statistical linearisation. A dynamic stiffness approach developed elsewhere is used to deal with the dynamics of the mooring cables. The power spectral densities of low-and wave-frequency responses are obtained which clearly show the influence of mooring line damping. The non-Gaussian probability density functions (pdf) and expected crossing rates of vessel responses and dynamic cable tensions are determined using the Kac-Seigert technique, and the influence of drag damping is highlighted.