浙江大学博士学位论文 has been developed and experiments have been done validating for feasibility and reliability of the system.The results show that this analysis method is feasible and reasonable for analyzing and optimizing the propulsion performance. In summary,the hydrodynamic model and numerical results of the flexible undulating fin provide a good foundation for research and development of a flexible undulating fin based system. Keywords long flexible fin,lateral flexible fin,undulating,biomimetic,fluid-solid interaction,3D unsteady,dynamic mesh,propulsion performance VI浙江大学博士学位论文 h嬲been d“e10ped锄d eXp舐ments have been done validating for fe嬲ibili够a11d rdiabil时 of me syStem．The results show mat tIlis锄【alysis method is feaSible锄d reaSom【ble for mlaLlyzing and optmzing t11e propulsion p耐b皿锄ce． Ill suIl：1111aⅨme hydrodyn锄ic model aIld IlⅢnerical results of也e neXible岫dulating fm pr0Vide a good fouIldation for research a11d deVelopmem of a nexible uIldulatir培血baLsed system． Keywords long nexible fm，lateral neXible fm，u11dulating，biom油etic，nuid—solid interaCtion，3D unsteady，dynamic mesh，propulsion perfo锄ance VI