Damage identification in plates using finite element model updating in time domain
Damage identification in plates using finite element model updating in time domain
复制标题
使用时域有限元模型更新进行板损伤识别
DOI：
10.1016/j.jsv.2013.08.028
复制
发表时间：
2013-12
影响因子：
4.7
通讯作者：
J.K.Liu
中科院分区：
文献类型：
--
作者：
Y.Z.Fu;Z.R. Lu;J.K.Liu
提出了一种基于响应灵敏度的各向同性板结构局部损伤识别方法。局部损伤是通过减少板的基本杨氏模量来模拟的。在正演分析中，板在外力作用下的强迫振动响应由Newmark直接积分得到。在反分析中，采用基于响应灵敏度的有限元模型修正方法，在时域内识别板的局部损伤。利用结构的实测动力响应，采用基于Tikhonov正则化的罚函数法迭代求解，得到了结构的损伤识别结果。两个数值算例验证了该方法的正确性和有效性。研究了单损伤和多损伤情况。研究了测量噪声和测量点对辨识结果的影响。研究表明，该方法对板结构的单损伤和多损伤都具有较好的鲁棒性和有效性。从少量测点的短时程可以得到较好的识别结果。
A response sensitivity-based approach is presented for identifying the local damages in isotropic plate structures from the measured structural dynamic responses. The local damage is simulated by a reduction in the elemental Young's modulus of the plate. In the forward analysis, the forced vibration responses of the plate under external force are obtained from Newmark direct integration. In the inverse analysis, a response sensitivity-based finite element model updating approach is used to identify local damages of the plate in time domain. The damage identification results are obtained iteratively with the penalty function method with Tikhonov regularization using the measured structural dynamic responses. Two numerical examples are investigated to illustrate the correctness and efficiency of the proposed method. Both single damage and multiple damages cases are studied. The effects of measurement noise and measurement point on the identification results are investigated. Studies in this paper indicate that the proposed method is efficient and robust for both single and multiple damages for plate structures. Good identified results can be obtained from the short time histories of a few number of measurement points.
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影响因子：
10.2
作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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通讯作者：
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