Springing analysis of VLCC based on hybrid hydroelasticity theory
Springing responses will induce continuous vibrating stresses, with high frequencies and certain amplitudes, and will cause severe fatigue damage in ship structures.In this paper, the numerical simulations and model tests on the springing responses of a 350,000 DWT Very Large Crude Carrier (VLCC) were conducted.Springing analysis in the frequency domain adopted the modal analysis, 3-D Finite Element Method (FEM) and 2-D Timoshenko beam transfer matrix method, combined with 2-D strip method based on Method of Fundamental Solutions (MFS).Meanwhile, the segmented model tests are conducted in two load conditions and two hull girder stiffnesses.The experiment results are compared with numerical results.In conclusion, the methods show that the springing would be excited more easily when the VLCC is in ballast condition or the full loading conditions with reduced stiffness.Compared with transfer matrix method, the error of 3-D FEM natural mode won”t increase as natural frequency does and the accuracy of calculated generalized hydrodynamics based on the natural shapes will improve.The method based on MFS is compared with Boundary Element Method (BEM) to demonstrate its accuracy.Considering the calculation accuracy and speed, the above hybrid hydroelasticity method can apply to engineering purpose.
Springing responses Hybrid hydroelasticity theory the 3D Finite Element Method Segmented model test Hull girder stiffness
LIN Yuan MA Ning GU Xie-chong
State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China
国内会议
长春
英文
315-321
2017-08-08（万方平台首次上网日期，不代表论文的发表时间）