...---the cavitator, fins, and vehicle body---were obtained by dynamics modeling. The longitudinal stability of the nonlinear dynamics is analyzed through the phase portrait of pitch angle/pitch rate based on steady state dynamics. Numerical simulation shows that the supercavitating vehicle can maintain pitch angle...

... in their models. chaotic motion topside roll subsea system convolution term impact map amplitude spectrum lmu model body-fixed coordinate system poincaré section phase portrait artificial intelligence float-over system numerical model float-over installation state space model operation...

... fixed-fixed riser phase portrait invariant manifold modal shape catenary riser nonlinear normal mode amplitude fixed-moored riser mazzilli equation nonlinear mode Non-linear Modal Analysis Applied to Riser Dynamics César T. Sanches1, Carlos E. Mazzilli1, Leandro D. Cunha2, Celso P. Pesce2...

... coefficient encounter frequency phase portrait container ship artificial intelligence time history equation Proceedings of the Tenth (2000) International Offshore and Polar Engineering Conference Seattle, USA, May 28-June 2, 2000 Copyright © 2000 by The International Society of Offshore and Polar...

... to an idealized geometric nonlinearity associated with a slack mooring or a mooring with gaps. The results are presented in the form of time series, phase portraits, spectra, Poincare maps, and Lyapunov exponents. The influence of various governing parameters on the response is examined. Periodic, sub-harmonic...

... hand, it has been also reported that low-frequency, subharmonic oscillations often occur in the motion of a structure with nonlinear moorings (e.g., Lean, 1971). mooring system monochromatic excitation phase portrait bifurcation diagram stiffness ratio upstream oil & gas nonlinearity...