Abstract:To explore the dynamic behavior of tension anchor under the state mooring, established a mathematical model of the new type anchor based on rod theory. The model is verified by theoretical analysis and finite element method based on ANSYS. Through the numerical simulation, the vibration natural frequency and vibration mode are obtained under the tensioning force in transverse, and the error between numerical solution and theoretical solution is less than 8%, which is in accordance with the requirements of engineering application. Through the analysis of the anchor in the frequency sweep of 0-200 Hz, the resonance frequency is the most likely to be calculated. Theoretical calculation and numerical simulation results show that: the rod theory model has high precision, which is applied to the vibration analysis of anchor and to avoid the resonance with the external factors such as the waves, and improve the stability of the floating structure, and provide a theoretical basis for the initial design of anchor.