Simulation analysis of modular assembly accuracy of marine power shafting based on 3DCS

Modular shipbuilding can effectively shorten the cycle of construction and improve quality of the product, however stricter requirements of the accuracy control for product have been proposed at the same time. Taking a marine power shafting as an example, the influences of part manufacturing, positioning and matching errors on the axial and radial deviations of the stern and power shaft were studied based on 3DCS. The main factors affecting the assembly accuracy and their contribution were determined. It was found that the sealing device was the most influential factor for the deviation of stern and power shaft. The contribution of sealing device to the radial and axial deviation of stern shaft were 99.45% and 83.12% respectively, and to the radial and axial deviation of power shaft were 98.91% and 74.21% respectively. The research results would provide guidance for accuracy control of marine shafting modular construction.