确定海洋管道铺设作业参数的软件实现

【作者】 徐德会；

【导师】 冯刚；

【作者基本信息】 大连理工大学 ， 机械设计与理论， 2001， 硕士

【摘要】 为了确定用铺管船法铺设海洋管道过程中的作业参数，必须对海洋管道的铺设方式和作业状态进行分析。对海洋管道分析主要分为管道数学模型的建立和数值求解两方面内容。 考虑海洋管道非线性、弹性几何大变形问题，把铺设中的海洋管道作为弹性大变形梁，用大挠度梁理论建立平衡微分方程，利用样条函数作为试函数，采用加权残数法之配点法将管道的微分方程化简为一组非线性方程组，求解非线性方程组得到问题的解。 在浅水铺管时，如果管道刚度较大，可以不考虑管道的变形引起的非线性因素的影响，近似地把浅水中的管道模型视为线性梁，用线性有限单元法求解。对于上述两种算法在浅海中的应用进行比较可知：采用线性梁、有限单元法分析求解，虽然计算省时，但有一定局限性，只适合浅水中的管道分析，否则计算误差较大；而采用大挠度梁、样条函数配点法分析求解，同样计算时间较短并且满足工程精度要求。 本文主要用大挠度梁、样条函数配点法对深水、浅水中的管道进行了静力、动力和收弃管等其它作业状态分析计算，在此基础上用面向对象的程序设计方法编制了计算软件，本软件界面友好、计算速度快、适用范围广并且满足工程精度要求。更多还原

【Abstract】 For determining working parameters during the pipe-laying operation with a lay-barge, the laying method and other working situation of the pipeline must be analyzed. The analysis of pipeline mainly includes two facet: establishing mathematical model and numerical calculation.The aspect of non-linearity, elasticity and large deformation of the pipeline considered, the pipeline is regarded as elastic large deflection beam model. The differential equations are established according to the large deflection beam theory, spline functions are used as trial functions to simulate the deformation curves of the pipeline, the differential equations are deduced to non-linear coupled equations by using collocation method of weighted residuals method, non-linear coupled equations can be solved.The aspect of non-linearity caused by deformation of the pipeline may not be considered in the swallow sea if rigidity of the pipeline is high enough, linear beam model is established for the pipeline and solved by using finite element method. The results obtained through above-mentioned method are contrasted. Though the way of linear beam model and finite element method has characteristics of high calculating speed, it has certain localization that this method is suitable for the analysis of pipeline in the swallow sea, else unacceptable errors appear. The way of large deflection beam and collocation method also has high calculating speed and acceptable accuracy .The way of large deflection beam and collocation method is mainly used to analyze the static and dynamic problems of the pipeline, abandon and recovery and other working condition in the swallow and deep sea. Based on this, the computer programs are made out with object-oriented method. This computer program has characteristics of friend interface, high calculating speed, broad common use and acceptable accuracy.更多还原