Parametric uncertainties for dynamic response evaluation of offshore structures |
| |
Authors: | K Venkataramana K Kawano |
| |
Affiliation: | (1) Department of Ocean Civil Engineering, Kagoshima University, Korimoto 1-21-40, 890 Kagoshima, Japan |
| |
Abstract: | The dynamic characteristics involved in the loading process in the ocean environment are extremely complicated and difficult
for exact evaluation. In this paper, parametric studies are presented to assess the influence of uncertainties associated
with various assumptions and approximations, involved in modelling the dynamic loading processes of ocean environment, for
the evaluation of dynamic response of offshore structures. These uncertainties are represented by the inertia coefficient
and the drag coefficient of the Morison equation which defines the wave forcing function, the mean height of the input sea
waves and the shear wave velocity of the soil. The results show that the effects of uncertainties are closely related to the
natural frequency of the structure and the predominant frequency of the wave force. These uncertainties, except the variation
in the shear wave velocity in the soil, contribute significantly to the dynamic response and the first passage probability
evaluation of the offshore structure systems. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|