本研究依據拓樸最佳化的方法於貨櫃船舯部縱梁開孔設計應用，比較原始設計與拓樸最佳化設計，計算其Von mises應力分佈，以船級社標準探討拓樸最佳化設計開孔可行性。
使用ANSYS模擬軟體應力分析模組，以1800TEU貨櫃船舯部縱梁為對象，對其設定不同邊界及施加不同負載的條件下，針對縱梁所受應力加以探討。
拓樸最佳化使用方法為密度函數法，以最小柔度為目標函數，並設定限制體積作為限制條件，以縱梁區域為開孔設計對象進行最佳化分析。
比較原始設計與拓樸最佳化設計，分析其應力分佈以及開孔形狀，以計算驗收標準判斷拓樸最佳化設計是否優於原始設計。

This study deal with hull girder lightening hole design of Topology optimization, Compare the original design to the optimization design, It then goes on to calculate Von mises stress distribution, and discuss feasibility of Topology optimization method based on Lloyd's Register rule.
Using the analysis module inside ANSYS simulation software stress, taking 1800 TEU container amidship longitudianl girder as a research subject, Before proceeding to discuss longitudianl girder, it will be necessary to setting different boundaries and applying different loads.
The method of Topology optimization is the density function method, the minimum compliance is the objective function, and the volume is set as the constraint condition, taking the longitudinal girder area as the design object of the lightening hole for optimization analysis.
After compare the original design to the topology optimization design, analysis the stress distribution and the shape of the hole, with acceptance criteria to judge the topology optimization design is better than the original design.

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