Abstract
Lightweight design of the skeletal structure is a critical challenge in the development of Blended-Wing-Body Underwater Gliders (BWBUGs). However, existing studies often rely on empirically derived configurations for parameter optimization, which limits the potential to fully exploit structural performance. To address this issue, this paper proposes a design approach for BWBUG skeletal structures that integrates topology optimization with data-driven optimization, termed the TD-Method. Specifically, the TD-Method first applies topology optimization to identify load transfer paths within the BWBUG structure, thereby generating an initial configuration and a parameterized model for subsequent optimization. On this basis, data-driven optimization is employed to extensively explore the design space, enabling lightweight structural design under specified constraints. Finally, a comparative analysis with existing methods demonstrates that the TD-Method achieves superior skeletal structures with enhanced performance, confirming both the effectiveness and advantages.