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A gradient based iterative algorithm for solving model updating problems of gyroscopic systems

机译:陀螺系统模型更新问题的基于梯度的迭代算法

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摘要

Model updating should be correlated with experimental data to ensure that it models the dynamics of the real structure and the updated model predicts the dynamics of a structure more accurately. Considering that the iterative methods for model updating have aroused little public attention, this paper studies an iterative algorithm for quadratic model updating problems which can incorporate the measured modal data into the finite element model to produce an adjusted finite element model on the mass, gyroscopic and stiffness matrices that closely match the experimental modal data. By this method, the best approximation symmetric and skew-symmetric solutions can be obtained by choosing a convergence factor. Numerical example shows that the introduced iterative algorithm is quite efficient.
机译:模型更新应与实验数据相关联,以确保其对真实结构的动力学建模,并且更新后的模型可以更准确地预测结构的动力学。考虑到模型更新的迭代方法很少引起公众关注,本文研究了一种用于二次模型更新问题的迭代算法,该算法可以将测得的模态数据合并到有限元模型中,以生成质量,陀螺仪和模型的经调整的有限元模型。刚度矩阵与实验模态数据非常匹配。通过这种方法,可以通过选择收敛因子来获得最佳的近似对称和偏斜对称解。数值算例表明,所引入的迭代算法非常有效。

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