附加重量缓波立管数值分析

Numerical Analysis of a Weight Added Wave Riser

对浅水海域使用的新型附加重量缓波立管进行数值计算,分析管内流体密度对柔性立管的动力特性影响,进行附加装置对立管平面外运动影响的分析,同时引入一种模型简化的计算方法,结果表明,内流密度对立管位形、最大曲率和最大有效张力的影响较大,附加装置的应用减小了立管碰撞的概率,同时发现该模型简化方法不仅计算准确,而且易收敛、计算时间短。

Numerical calculation was made for innovative weight added wave riser used in shallow water. The influences of fluid density inside the pipe upon the dynamic properties of flexible pipe risers were analyzed,as well as the influence of additional device upon the out-of-plane movement of risers. A calculation method with model simplification was introduced. Results indicated that the internal flow density has a great effect on the configuration,maximum curvature and maximum effective tension of risers. The additional device can reduce the probability of collisions among risers. The model simplification method is not only accurate but also convergent easily with short calculation time.