Simulation of thin-walled cylindrical parts assembly under ship oscillation

Swaying is the main factor restricting the precision docking of shipboard thin-walled parts. Aiming at the assembly error analysis problem of thin-walled cylindrical parts under ship oscillation, this paper presents a simulation analysis method of butt surface center error based on finite element analysis and dynamic analysis. The method integrates the control performance of the electromechanical system, the dynamic deformation of the structure and the transmission clearance. In swaying environment, establishing the simulation model of cylinder parts docking test system based on Stewart platform. Based on finite element analysis and dynamic simulation, the safety characteristics of the system are verified and the center error of the docking surface is calculated. The results show that the center error of the test system docking is 0.75mm when the ship roll amplitude is 6.25° and 2.5°. And the effectiveness of this error analysis method is verified by comparing the simulation and test results of the test system in gravity environment.