摘要
深水S型铺设时,管线承受巨大的环境载荷,需要准确地模拟管线受力,以保证管线安全。基于集中质量法,推导管线受力计算公式,建立考虑海床、托管架以及海流影响的S型铺管的三维管线数值模型,用广义α积分对铺设系统进行动力迭代求解,采用Fortran语言编写程序,将静力分析结果与Orcaflex计算结果对比,验证了理论模型的正确性。最后结合算例分析了垂荡和纵荡运动下,张紧器张力变化情况,以及垂荡运动时管线的有效张力、弯矩、速度和加速度的变化情况。
When pipelaying by S-lay method in the deepwater, pipeline suffers from a huge environmental load. It＇s necessary to simulate the pipeline＇s force to guarantee the safety of the pipeline. Pipeline equilibrium equation is derived based on the lumped mass method. Considering the seabed, stinger and current, a three-dimension force model for S-lay method in the deepwater is built. Generalized-α is used to solve the dynamic analysis with a discrete stinger, using Fortran program. Comparison of the static results with Orcaflex＇ s results＇ shows that the correctness of the theoretical model. The change of tensioner force is calculated in heave and surge, and the range of pipeline＇s effective force , bending moment velocity and acceleration is calculated in heave.
出处
《中国海洋平台》
2015年第2期70-76,共7页
China offshore Platform
基金
3000米水深大型起重铺管船自主研发项目(COOEC)
深海工程科学与技术创新引智基地计划基金(B070019)
