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在海洋管道敷设期间,对管道应力分析要考虑的因素很多,如托管架的曲率和长度、管道的张力和浮力、管道的覆盖层及其输送的介质,特别是当用敷管船敷设管道时,有很长一段管子悬在海水中,使管子存在较大的弯矩。另外,由于管道存在大转角,产生较难处理的非线性问题。因此,需要精确地计算管子的变形、荷载和应力,将动坐标迭代法应用于海洋管道敷设期间的应力分析,并用一种新的“接触”与“放松”的迭代算法求解管道和海洋的接触受力问题。结果表明,该算法能很快地收敛到精确结果,满足工程分析要求。
During the laying of marine pipelines, there are many factors to be considered in stress analysis of pipelines, such as the curvature and length of the stinger, the tension and buoyancy of the pipeline, the coverage of the pipeline and the medium it delivers, especially when laying the pipeline with a pipe , There is a long period of pipe hanging in the sea water, so that there is a big pipe bending moment. In addition, due to the large corners of the pipe, non-linear problems that are difficult to handle arise. Therefore, it is necessary to accurately calculate the deformation, the load and the stress of the pipe, apply the dynamic coordinate iteration method to the stress analysis during the laying of marine pipelines, and use a new iterative algorithm of “contact” and “relaxation” to solve the pipe and ocean contact Stress problem. The results show that the algorithm converges to accurate results quickly and meets the requirements of engineering analysis.