TY - JOUR

T1 - Dynamic modeling of offshore towers with general damping subjected to earthquakes.

AU - Moustafa, K. A.

AU - Asfar, K.

AU - Dries, F.

PY - 1986/1/1

Y1 - 1986/1/1

N2 - The modeling problem of offshore towers subjected to earthquake excitation is considered. A model is proposed which includes viscous and hydrodynamic drag damping and takes into account the stochastic nature of the problem. The model is decoupled into a set of modal equations by using the complex mode theory. A technique is developed to identify the modal parameters and the complex mode shapes. This technique is computationally efficient and accurate in the sense of minimizing a criterion function of the estimates variance. A simulation example is presented to demonstrate the results. (A)

AB - The modeling problem of offshore towers subjected to earthquake excitation is considered. A model is proposed which includes viscous and hydrodynamic drag damping and takes into account the stochastic nature of the problem. The model is decoupled into a set of modal equations by using the complex mode theory. A technique is developed to identify the modal parameters and the complex mode shapes. This technique is computationally efficient and accurate in the sense of minimizing a criterion function of the estimates variance. A simulation example is presented to demonstrate the results. (A)

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M3 - Article

AN - SCOPUS:0022502327

VL - 1 , New York, U.S.A., Am. Soc. Mech. Engrs., 1986, p.679-686.

JO - IN: 1986 OMAE TOKYO, PROC. FIFTH (1986) INT. OFFSHORE MECHANICS & ARCTIC ENGINEERING SYMP., (TOKYO, JAPAN: APR. 13-18, 1986),

JF - IN: 1986 OMAE TOKYO, PROC. FIFTH (1986) INT. OFFSHORE MECHANICS & ARCTIC ENGINEERING SYMP., (TOKYO, JAPAN: APR. 13-18, 1986),

ER -