Identification of system parameters and input force from output only
Identification of system parameters and input force from output only
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DOI：
10.1016/j.ymssp.2006.11.004
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发表时间：
2007-07
影响因子：
8.4
通讯作者：
Zhong-Rong Lu;S. Law
中科院分区：
文献类型：
--
作者：
Zhong-Rong Lu;S. Law
本文提出了一种基于结构响应灵敏度的结构参数识别方法。正弦和脉冲力进行了研究。在逆分析中，只需要一个或两个加速度计的短时间测量，并采用基于动态响应灵敏度的迭代梯度模型修正方法。假设输入力的位置在识别中是已知的。在具有不同灵敏度的参数的混合物中，相对不敏感的参数的识别不良被解决，并且用另一个优化循环来解决。两个数值模拟结果表明了所提出的方法的有效性，并通过一个简支钢梁的实验结果进行了验证。
A method based on sensitivity of structural responses is presented for identifying both the system parameters and the input excitation force of a structure. Both sinusoidal and impulsive forces are studied. In the inverse analysis, a short length of measurement from only one or two accelerometers is required, and an iterative gradient-based model updating method based on the dynamic response sensitivity is adopted. The location of the input force is assumed known in the identification. The poor identification with the relatively insensitive parameters in a mixture of parameters with different sensitivities is addressed and solved with another loop of optimization. Validity of the proposed method is demonstrated with two numerical simulations and verified with laboratory results from a simply supported steel beam.