多功能施工平台在恶劣环境荷载下结构动力响应

Structure dynamic response of multi-functional construction under unfavorable environment load

自升式多功能施工平台结构刚度小,受近海大波浪、长周期涌浪等恶劣荷载影响,结构动力响应剧烈。结合线性化的莫里森方程和随机波浪理论,以自升式多功能施工平台为原型,利用ANSYS有限元软件分别对平台模型进行了模态分析和瞬态动力响应分析,得到了平台结构的频率特性和振动特性,为平台的安全性和可靠性评估,以及如何控制平台结构的振动响应提供了理论基础。

The stiffness of jack-up construction platform structure is weak, by offshore large waves and long period of time of swell, the structure produces a violent dynamic response. Based on the linearized equation of Morrison and random wave theory and using ANSYS finite element software, we carry out the modal analysis and transient dynamic response analysis, by which we obtain the frequency characteristics and vibration characteristics. The result provides a theoretical basis for the safety and reliability of evaluation platform, as well as control of the vibration response of the platform structure.