冰激自升式海洋平台疲劳寿命分析

Fatigue Life Analysis of the Jack-up Platform Induced by Ice Vibrations

自升式平台属于典型的柔性结构,在海冰作用下容易发生冰激振动现象,冰振不仅能够产生较大的平台加速度,引起平台工作人员不适,而且会产生结构的疲劳破坏,因此,寒区自升式海洋平台的冰激疲劳寿命分析非常必要。基于开展的冰与带齿条结构的模型试验,该文首先明确了冰与自升式平台桩腿结构的相互作用形式;其次,提出自升式平台冰振疲劳寿命分析流程;最后,以渤海某典型自升式平台为例,利用ANSYS软件进行冰激疲劳寿命分析。该文的研究对于寒区自升式平台的设计及安全运行具有一定的指导意义。

Due to the specific environment of the Bohai Sea and structural features, ice-in- duced vibration will be easily for the Jack-up. The vibration can cause larger deck accelera- tions, discomfort the people who woked on platform and will produce structure fatigue dam- age. The ice-induced fatigue life analysis of Jack-up in ice areas is necessary. Based on the model test that test the interaction of the Jack-up with ice, this paper present the ice and Jack -up leg structure form of interaction. Secondly, a fatigue life evaluation method for Jack-up in ice areas is presented. Finally, A case study for typical Jack-up in Bohai Bay is presented in ANSYS. At the time , the ice-reduced fatigue life of Jack-up which is built recently is analyzed in detail . The research results in this paper are helpful to the design and safety evaluation of Jack-up in ice areas.