Objectives This study investigates a T-spline-based approach for ship compartment modelling and performance analysis, aiming to enhance flexibility and efficiency during the preliminary design stage.

Method First, a parametric control model of the compartments is established. Then, automatic compartment division and simulation coupling are implemented on the Rhino amp; Grasshopper platform using GhPython scripting and the T-splines plugin. The floatation solution is obtained using Newton's iterative method, and a stability analysis method incorporating free surface correction is applied.

Results Taking a 50 000 DWT oil tanker as an example, the hull was modeled and the visualized subdivision of bulkheads, as well as the calculated GZ curve, achieved the required engineering accuracy, with an error less than 1%.

Conclusions The results indicate that the T-spline-based parametric modeling and analysis method exhibits strong engineering adaptability and extensibility. It is suitable for rapid assessment of stability performance of multi-schemes during the preliminary design stage, and shows promising potential for broader engineering applications.