Modified Equivalent Liner Computional Model And Application In Dynamical Analyse Of Seabed-Wave-Structure Coupling System

In the field of harbor and offshore engineering, the structure-wave-seabedcoupling system can often be found in some structures such as dock, breakwater andbucket foundation platform. Study on the mechanism of instability and failure of thiskind of structure is an unsolved topic and a research full of challenge in the field ofnumerical analysis. Study has indicated that the intensity and distortion of soils underlong time action of cycle load is an important factor to the stability of coupling system.So, to do the dynamic analysis on the structure-wave-seabed coupling system andintroduce the proper stress-strain law is an important base to analyze the dynamicstability of the coupling system.In this paper, a dynamic finite computional model of the structure-wave-seabedcoupling system is established based on MSC.Marc. The seabed soils has thecharacteristic of nonlinear distortion and intensity decrease and in this paper themodified Hardin model has been introduced in to the MSC.Marc by the usersubroutine during the dynamic analysis of the coupling system, at the same time, theproper pore pressure model witch fit the saturated cohesive soils has been introducedin to the coupling system then the modified equivalent liner computional model hasbeen established and a new way to do dynamic analysis has been established. For themodified Harding model can reflect the intensity's change of soils with cycle load, it'scomputional result is more close to model test, and this show the modified Hardingmodel's advantage. So the result of this paper has established the foundation ofdynamic instability study of this kind structure system...