浮船钻井隔水管的有限元时域动态分析

隔水管是浮船钻井系统的一个关键部件。本文采用有限单元法对隔水管进行了时域动态分析。由于采用高次单元位移模式,在单元数很少的情况下,也得到了满意的结果,而计算时间大为减少。计算实例表明,仅取三个或五个单元,结果即趋收敛。本文对规则波和不规则波作用下隔水管的响应都进行了分析,将不规则波处理为一系列规则波的叠加。

DYNAMIC ANALYSIS OF FLOATING VESSEL DRILLING RISER BY THE FINITE ELEMENT METHOD

Marine riser is a critical component of a floating vessel drilling system. This paperpresents a time-domain dynamic analysis of marine riser by the finite element method. By taking a higher order displacement model, a fairly small number of elements can result in a satisfactory solution. And thus the computation time can be greatly reduced. In the ease of risers analyzed in the paper, convergent results are obtained by using only three or five elements. The responses of risers to regular or irregular waves are all covered in the paper. Irregular waves are treated as summation of a series of regular waves.