孔宪仁, 秦玉灵, 罗文波. 基于优化的蜂窝板有限元模型修正[J]. 航天器环境工程, 2010, 27(2): 227-230
引用本文: 孔宪仁, 秦玉灵, 罗文波. 基于优化的蜂窝板有限元模型修正[J]. 航天器环境工程, 2010, 27(2): 227-230
Kong Xianren, Qin Yuling, Luo Wenbo. Honeycomb panel model updating based on optimization[J]. Spacecraft Environment Engineering, 2010, 27(2): 227-230.
Citation: Kong Xianren, Qin Yuling, Luo Wenbo. Honeycomb panel model updating based on optimization[J]. Spacecraft Environment Engineering, 2010, 27(2): 227-230.

基于优化的蜂窝板有限元模型修正

Honeycomb panel model updating based on optimization

  • 摘要: 蜂窝板具有较高的比强度和比刚度,在航空航天领域得到广泛应用。用三明治等效方法计算蜂窝板等效材料参数,在MSC.Patran中建立有限元模型计算蜂窝板基频,通过分析设计变量和目标函数在NASTRAN中对蜂窝板基频进行优化,利用优化结果确定等效剪切弹性模量计算公式中修正系数γ并重新计算修正后模型基频,以试验所测基频值为标准对蜂窝板有限元模型进行修正。修正后模型计算基频值与实测值之间的偏差明显减小,证实了模型修正的有效性。

     

    Abstract: The honeycomb panel, due to its high specific strength and stiffness, is widely used in aeronautical, ABSTRACTS OF THE PRESENT ISSUE astronautical and other fields. The equivalent material parameters are calculated using the sandwich equivalent method, The finite element model (FEM) is set up in MSC.Patran to calculate the first order frequency of the honeycomb panel, which is optimized in Nastran by analyzing the design variable and the objective function, and the optimized result is used to confirm the equivalent modulus of elasticity in shear, which is used to recalculate the first order frequency of the FEM, then the FEM of the honeycomb panel is updated based on the test result. The error between the calculated and the test results is greatly reduced, which shows the validity of the model updating.

     

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