A quasi-steady time domain method is developed for the prediction of dynamic behavior of a mooring system under the environmental disturbances, such as regular or irregular waves, winds and currents. The mooring force...A quasi-steady time domain method is developed for the prediction of dynamic behavior of a mooring system under the environmental disturbances, such as regular or irregular waves, winds and currents. The mooring forces are obtained in a static sense at each instant. The dynamic feature of the mooring cables can be obtained by incorporating the extended 3-D lumped-mass method with the known ship motion history. Some nonlinear effects, such as the influence of the instantaneous change of the wetted hull surface on the hydrostatic restoring forces and Froude-Krylov forces, are included. The computational results show a satisfactory agreement with the experimental ones.展开更多
Overall wave loading and local hydrodynamic pressure distributions on a platform mat in regular waves for shallow waters are experimentally investigated in order to examine the severity of the nonlinear effects and sh...Overall wave loading and local hydrodynamic pressure distributions on a platform mat in regular waves for shallow waters are experimentally investigated in order to examine the severity of the nonlinear effects and shallow water effects. Wave focusing phenomenon is observed in the tests. The measured results may also provide a comparison basis for the theoretical development to consider the nonlinear interaction between waves and viscous flow by introducing viscosity into wave theories.展开更多
基金The project was financially supported by the Foundation of Doctorate Program of the State Education Commission of China
文摘A quasi-steady time domain method is developed for the prediction of dynamic behavior of a mooring system under the environmental disturbances, such as regular or irregular waves, winds and currents. The mooring forces are obtained in a static sense at each instant. The dynamic feature of the mooring cables can be obtained by incorporating the extended 3-D lumped-mass method with the known ship motion history. Some nonlinear effects, such as the influence of the instantaneous change of the wetted hull surface on the hydrostatic restoring forces and Froude-Krylov forces, are included. The computational results show a satisfactory agreement with the experimental ones.
基金The project was financially supported by the Foundation of Doctorate Program of the State Education Commission of China
文摘Overall wave loading and local hydrodynamic pressure distributions on a platform mat in regular waves for shallow waters are experimentally investigated in order to examine the severity of the nonlinear effects and shallow water effects. Wave focusing phenomenon is observed in the tests. The measured results may also provide a comparison basis for the theoretical development to consider the nonlinear interaction between waves and viscous flow by introducing viscosity into wave theories.
