多模块浮体ADAMS动力学仿真及连接器对响应特性的影响

Dynamic simulation and connector′s effect on the response characteristics of multi-modular floating structure using ADAMS

海上超大型浮体是一个由多模块组合而成的网络系统。基于非线性网络动力学理论及水动力学参数,利用ADAMS软件建立了链式结构海上超大型浮体的虚拟样机模型。通过数值仿真,研究了不同连接器连接的大型浮体的非线性动力学响应和连接器载荷。发现了多模块大型浮体系统存在振幅死亡现象和模块间的网络协同作用。基于振幅死亡机理的稳定性分析,在连接器刚度和波浪周期所构成的二维参数平面内绘制了振幅死亡稳定性参数区域,该研究为海上大型浮体非线性动力学响应预报提供了一种新的方法。

Very large floating structures can be considered as a network consisting of multiple modules.Based on the nonlinear network dynamic theory and the commercial software ADAMS,a virtual prototype model of the chain-type floating structure is built.The effects of various connectors on the load and the nonlinear dynamic response of very large floating structures are studied through numerical simulations.The phenomena of Amplitude Death and the synergetic dynamics of the very large floating structure are also investigated.With the mechanism of Amplitude Death,the regions for the onset of Amplitude Death state are illustrated in the parameter domain of the connector stiffness and the wave period for the stability design.This work provides a new method to study the nonlinear dynamic response of very large floating structures.