This study focuses on the mechanical performance optimization of local ship structures, primarily conducting two-dimensional and three-dimensional topology optimization research on ship brackets. During the topology optimization phase, the Multi-Island Genetic Algorithm (MIGA) was employed to optimize the material distribution of local structures such as brackets and hatch corners. Finite element models were established using Abaqus software, and through its secondary development, Python scripts were utilized to automate the iterative optimization process. The introduction of sensitivity analysis methods accelerated the iteration speed, and an optimization model was constructed with the objective of minimizing strain energy and the constraint of model mass, ultimately yielding structures with superior mechanical performance. Additionally, this study supplemented the optimization with shape optimization. Based on the Isight optimization platform, Patran parametric modeling and the Nastran finite element solver were integrated, and multi-point spline curves were applied to further refine the edge shapes. The research demonstrates that topology optimization and shape optimization can achieve structures with better mechanical performance under the same conditions, providing valuable insights for the design of local ship structures.
Yang et al. (Sun,) studied this question.