Numerical Research On The Dynamic Analysis Methods Of Mooring Lines

Due to the complexity of environmental load,mooring material specificity and particularity of mooring configuration,the analysis of mooring system would involve nonlinear fluid-soild coupling,hydrodynamic nonlinearity and motion stability of all mooring system.The analysis of dynamics of cables becomes the basis of reliability analysis and simulation of time domain motion Making the offshore mooring system as subject,the thesis studies numerical method of cable system's dynamics,and concludes the applicability,advantages and disadvantages of various methods. Taking features of the study object into consideration,the thesis chooses to adopt the finite difference method. Based on the above analysis,several works have been done as follows.1.Analysis of dynamics is made through studying loads features of mooring lines under specific working situations.2. Several available plans are concluded through learning present methods of cable dynamics and combining dynamic features of mooring lines.3. The equation of the response of mooring lines dynamics is deduced, considering the dynamic features of mooring lines.4. The confirmation of numerical format of motion equation and its calculation analysisNumerial method of solving equation is confirmed, based on the format of equation and combining various calculating plans5. The consideration of various situations in practice. Solutions of various situations in practice ( eg. Nonlinear factors) are studied and discussed.