采用 有限元软件PATRAN/NASTRAN的拓扑优化设计模块对该肋结构分别进行了单一工况和多工况情况下的拓扑优化，得到了拓扑形式清晰的设计结果。
Optimized the rib structure under a single load case and multiply loadcase respectively using the topology optimization module of the PATRAN/NASTRAN and get theclear design result of topology format.
采用 有限元软件PATRAN/NASTRAN的拓扑优化设计模块对该肋结构分别进行了单一工况和多工况情况下的拓扑优化，得到了拓扑形式清晰的设计结果。
Optimized the rib structure under a single load case and multiply loadcase respectively using the topology optimization module of the PATRAN/NASTRAN and get theclear design result of topology format.
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