Construction accuracy evaluation of ship stiffened panel based on 3D model reconstruction

Abstract

Fabrication-induced deformation throughout various stages of shipbuilding significantly affects construction accuracy. The accuracy evaluation of ship interim products is therefore essential for improving assembly quality and optimizing manufacturing process. However, traditional manual measurement methods merely yield discrete geometric information rather than overall structural deformation. This paper develops a comprehensive methodology for evaluating construction accuracy of ship stiffened panels based on 3D scanning technology. First, the scanning point clouds are divided into representative horizontal slices using a specific slicing strategy to simplify computational complexity. Then, a slice-based plane segmentation method is adopted to identify and segment different components of ship structures. On this basis, 3D surface parametric model of each component is reconstructed by higher-order panel element generation, facilitating accuracy assessment of structures. Experiments on two typical ship stiffened panels are conducted to verify the effectiveness of this method, and the construction accuracy of the specimens are systematically evaluated.