... and quadratic transfer functions to spectrally decompose the sway responses and then inverse Fourier transforming the model output. It is shown that the quadratic-model output "predicts" the low frequency drift oscillations of the TLP sway motion, whereas the linear-model output yields the high frequency...

... low frequency transfer function model test forward speed computation natural frequency coefficient regular wave tanker surge motion wave drift force surge direction frequency quadratic transfer function wave-current interaction effect moored tanker equation OTe 5631 Wave...

... coefficient frequency motion quadratic transfer function OTe 5175 Progress in Computer Simulations of SPM Moored Vessels by J.E.W. Wichers. MARIN Copyright 1986 Offshore Technology Conference - This paper wasprEfsented at the 18th Annual OTe in ,Houston, Texas, May 5-8, _1986. The material is subject...

... On the Low Frequency Hydrodynaii-c DampingForces Acting on Offshore Moored Vessels 5 MEAN WAVE DAMPING QUADRATIC TRANSFER FUNCTION (EX- - TINCTION TESTS) From results of earlier extinction tests in regular waves an additional low frequency hydrodyna- mic damping force due to the presence of the waves only...

... drift force mooring system upstream oil & gas sway response frequency drift force quadratic transfer function barge sway response oscillation power spectrum artificial intelligence quadratic transfer function digital cross-bispectral analysis transfer function nonlinear drift...

... on the wave frequency and linearly proportional to the square of the wave height, the wave damping can be treated as a quadratic transfer function. Further it seems that the wave damping is independent of the fre- quency of the resonant surge motion. in which: (2) (m + a (w»x + b (w) .x + C .x = F (t) xx x...

... horizontal motions in moored structures. model test irregular wave subsea system cylinder quadratic transfer function head wave wave force wave drift force computation beam wave equation velocity potential upstream oil & gas vertical drift force transfer function frequency drift...