Mechanical characterization of posture adjustment carts under the multi-posture condition of the ship block

At present, shipbuilding mainly adopts the block construction method. The attitude adjustment trolley is crucial for the accurate and efficient docking of large ship blocks, and its performance directly affects the docking efficiency and accuracy. This paper first analyzes the structure and kinematics of the attitude adjustment trolley and studies its motion mode in detail. Then, finite element modeling and analysis are performed on the trolley to obtain the stress, displacement, and strain cloud diagrams. By applying different directions of force to the trolley, its working state is simulated in the block multi-attitude case. The results show that when the pressure is within the range of 25000N rated lifting force and the angle between the pressure direction and the horizontal plane does not exceed 15°, the maximum stress, displacement and strain of the trolley increase with the increase of the clamping angle. When the clamping angle reaches 15°, the maximum stress is 172 MPa, the maximum displacement is 0.9972 mm and the maximum strain is 0.002213. At the same time, as the angle increases, the location of the maximum stress and strain is shifted from the bottom of the slide table to the upper guide cap of the screw.