Linear and nonlinear response analyses of offshore structures under random wave and current loading

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:404203

Karadeniz, H ^[1]

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1. Delft Univ. of Technology (Netherlands)

This paper investigates effects of nonlinearities which arise from the drag force term of the Morison equation on response values of an example monopod tower. In the investigation, nonlinearities with stochastic character as well as due to large deformations are taken into account. A time domain analysis is carried out by using time dependent hydrodynamic damping which arises from the fluid-structure interaction. A traditional linearized spectral analysis is also carried out and the results are compared with those obtained from the time domain analysis. Since the hydrodynamic damping and the applied force are coupled with the response velocity an iterative procedure is used to solve the dynamic equilibrium equation. Discrete Fourier transform is used to calculate response spectra from the results of the time domain analysis.

• OSTI ID: 404203
• Report Number(s): CONF-940409--; ISBN 1-880653-10-9
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CALCULATION METHODS
DYNAMIC LOADS
FLUID-STRUCTURE INTERACTIONS
MATHEMATICAL MODELS
OFFSHORE PLATFORMS
RESPONSE FUNCTIONS
WATER WAVES
WAVE FORCES