基于缩尺实验的船舶大分段吊装动力学研究与验证

The trend of upsizing ships has spawned the emergence of large load cranes to carry out the segmented hoisting of large ships. For the large hoisting mechanism, the rationality and accuracy of the simulations are rarely verified by experiments. ADAMS was used to construct the dynamic model of the large section hoisting system of a ship. The model test platform was designed according to the similarity theory. The simulation method was verified by comparing the motion parameters of the models under different working conditions, and the effects of the rope length, hoisting mass, rope stiffness and damping on the dynamic responses in hoisting process were analyzed. Firstly, the numerical simulation results and model test results under the same working conditions were compared to verify the accuracy of the numerical simulation method. Then, four simulation models were established, and the rationality of the model test platform was verified by analyzing the dynamic response results of the swinging angle, acceleration, swinging angle period and swinging angular velocity of different models. Finally, the comparison between numerical simulations and model tests shows that with the increase of rope length, the angular velocity of the swinging angle decreases gradually, while the period of the swinging angle, swinging angle velocity, lifting acceleration and lifting speed increases gradually. The mass of lifting weight, rope stiffness and damping have little influence on the dynamic response of the swinging angle of lifting weight. The results provide theoretical and experimental references for the dynamic response research of large-scale hoisting.