Dynamic design optimization of an equivalent truncated mooring system

作者：Ferreira Fabio M G^*; Lages Eduardo N; Afonso Silvana M B; Lyra Paulo R M

来源：Ocean Engineering, 2016, 122: 186-201.

DOI：10.1016/j.oceaneng.2016.06.021

• Equivalent truncation
• Mooring system
• Dynamic characteristics
• Design optimization
• Calibration method

An important part in the development and hydrodynamic verification of new floating production systems involves carrying out testing on ocean basin laboratories. However, there is no ocean laboratory able to perform the testing of ultra-deepwater floating structure at reasonable model scale. Several methods have been proposed and developed to solve this problem. The hybrid passive method is organized in steps, where the first step is responsible for setting the truncated design. If this step is not performed satisfactorily, it may hamper the success of the testing. Thus, in order to minimize this issue, we propose in this paper the use of design optimization techniques to find the ideal truncated full-scale design considering the dynamic effects. We apply a calibration method to adjust design variables to optimally fit truncated mooring system to full-depth mooring system, in order to minimize the differences in motion and tension responses from the two systems. Furthermore, we check the truncated optimal design for many wave conditions using dynamic simulations. Due to the large computational cost involved in this check, we use high-performance computing to quicken this process. We will present and discuss two cases. In both cases, the results show that the truncated design found is equivalent to the full-depth design.

• 出版日期2016-8-1