基于MSC/NASTRAN的小水线面双体船结构优化设计研究

该文对NASTRAN的最新结构优化方法和结构优化流程作了介绍,阐述了NASTRAN一般结构优化的数学模型和拓扑优化的物理模型。以小水线面双体船的舱段模型为研究对象,首先以提高舱段结构的整体刚度为目标进行拓扑优化、形状优化和尺寸优化,进而结合工程适用性提出贴近优化结果的可行优化设计,最后通过有限元直接计算比较验证了优化方案相对常规设计的结构响应的改善。

Structural optimization of SWATH base on MSC/NASTRAN

This paper introduces the structural optimization algorithms and the implementation procedure of the MSC/NASTRAN, including the mathematical model of the general structural optimization and the physical model of the topology optimization. The cabin of a small waterplane area twin hull (SWATH) is optimized by the topology, shape and size optimization aiming at the improvement of the overall stiffness of the cabin structure. Then it proposes a reasonable optimized design close to the optimization results considering the engineering applicability. The improvement of the structure response of the optimized design scheme is validated by comparison with the regular design through the direct ifnite element calculation.