基于反应谱法的水下采油树结构地震响应分析

Study on the Seismic Response Analysis of Subsea Christmas Tree Structure Based on Response Spectrum Method

为研究地震对采油树结构的影响,采用谱分析法对采油树结构进行地震作用响应分析。对采油树结构进行模态分析,并判断其发生不良动力响应的可能。采用地震响应谱分析法对采油树结构进行X,Y及Z 3个方向的地震响应分析。结果表明,竖向地震对采油树结构的影响最大,地震作用对所选海域的采油树结构影响不大。

In order to study the influence of earthquake on Christmas tree structures, this study uses the spectrum method to perform the response analysis of the Christmas tree structures under earthquakes. Modal analysis is carried out for the structures to evaluate the potential probability of adverse dynamic responses occurring to the structures. The seismic response spectrum analysis method is adopted to analyze the seismic responses of the Christmas tree structures in the X, Y and Z directions. The results show that vertical earthquakes have the largest influence on the structures, but the earthquake does not have major influence on the Christmas tree structures in the selected sea regions.