Treffer: Research and implementation of an online platform for efficient and accurate ship hull design.

• In view of the particularity of ship hull structure and the limitations of online tools for hull design, this study developed an online tool - Ship Hull Iterative Parametrization Online (SHIP Online). SHIP online provides a feasible solution for ship hull online design and improving efficiency. • SHIP Online, developed with Django and $. ajax, integrates functions like hydrostatic and offsets calculations, linear deformation, combined deformation, interactive FFD, visual comparison, and report generation. This tool meets the needs of hull design while maintaining lightweight, accuracy and computational efficiency. Tests have shown that SHIP online is suitable for rapid and precise modeling. • SHIP online provides a highly accurate hydrostatic calculation method. The method was tested using a database of 35 hulls, with a focus on the precision of DV, LCB and CP. The results show that the error distribution is within 0.07 %. In addition, detailed testing on the parent ship DTMB-5415 showed that the maximum absolute parameter error was 0.005 %, which is basically considered to be 0. • As the significant deformation method in SHIP Online, combined deformation originally involved Fast Quadric Mesh Simplification (FQMS), Lackenby-FFD, and Nelder-Mead methods. Shifting the longitudinal center of buoyancy by −1 % loa tested the combined deformation. Based on the 90 % optimal mesh simplification rate, the absolute error of the hydrostatic parameters was <0.001, and the efficiency of the deformation was improved by 55.15 % compared with the software, showing high reliability and efficiency. With the development of computer graphics in front-end technology and internet applications, there are many universal online modeling tools like Spline and Vectary. However, ship hull design requires specific constraints like displacement volume and standard deformation algorithms such as Lackenby and Free-Form deformation (FFD). This study developed an online platform of ship hull parametric modeling and design called Ship Hull Iterative Parametrization Online (SHIP Online). Firstly, three deformation methods—linear,interactive FFD, and combined deformation—were implemented using JavaScript and Python. Fast Quadric Mesh Simplification (FQMS) and Nelder-Mead optimization were introduced for combined deformation. Secondly, the user interface was built with HTML5, JavaScript, and CSS. Thirdly, the synchronization and data transmission issues between front and back-end were handled by Django and $. ajax. Finally, the platform would be deployed on a cloud server for multi-system access. The DTMB-5415 standard model was used to evaluate the accuracy, efficiency, and functions of calculations and deformations in SHIP Online. The errors of hydrostatic parameters were nearly 0.0 %. With a 90 % optimal simplification rate and parameter errors under 0.001, combined deformation efficiency improved by 87.78 % and 55.15 % compared to deformation without FQMS and other software. Functional and user testing shows that the functions can be stably and normally executed. By integrating ship deformation algorithms and design constraints with the front-end technology, SHIP Online provides a Web-based rapid hull design platform instead of traditional 3D modeling client software. [ABSTRACT FROM AUTHOR]