结构海床耦合系统动力分析数值模型及考察

Dynamic Numerical Model of Seabed-Structure Coupling System and Investigations

基于改进的哈丁模型建立了结构海床耦合系统的等效线性化动力分析模型。等效阻尼比是对土体进行等效线性化分析的重要组成,论文着重对土体阻尼对结构海床耦合系统的影响效应进行了考察。接触面分离力是运用滑动库仑摩擦模型进行接触面效应模拟的重要参数,在以前的工作基础上,文中提出了新的结构-海床接触面分离力模型并进行了考察。

An equivalent linear computational model of seabed-structure coupling system is established based on the modified Hardin model. Considering that the equivalent damping ratio is an important factor in the dynamic analysis for soils using the equivalent linear method, the effects of soil damping on the response of seabed-structure coupling system are investigated with emphasis. The parameter of the separation stress on interface is also important in simulating the interface behavior using the sliding Coulomb friction model. Based on the previous research, a new model of separation stress on the seabed-structure interface, which describes the interface more reasonably, is postulated and compared with the conventional model.