Rapid direct-mode shape expansion for offshore jacket structures using a hybrid vector
Rapid direct-mode shape expansion for offshore jacket structures using a hybrid vector
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使用混合矢量对海上导管架结构进行快速直接模式形状扩展
DOI：
10.1016/j.oceaneng.2012.05.015
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发表时间：
2012-09
影响因子：
5
通讯作者：
Huajun Li
中科院分区：
文献类型：
--
作者：
Fushun Liu;Huajun Li
提出了一种用于海上导管架结构的快速直接模式形状扩展方法。当传感器未放置在海上结构的水下部分时，应使用快速模态展开技术进行结构损伤检测。这项工作应用混合矢量来扩展模态振型。混合矢量由主自由度 (DOF) 处的测量值和从属自由度处的恒定值基于一系列修改因子构建。一个理论发展是，所提出的方法是一种用于未测量分量估计的直接方法，与传统方法形成对比。另一个发展是，所提出的方法是一种非迭代方法，保证了未测量模态值估计的效率；选择导管架平台进行数值研究，结果表明，当忽略建模误差并且测量噪声在一定范围内时，即使对于更高的振型，该方法也可以对未测量的组件进行可靠的估计。还使用钢平台实验的动态测试研究了所提出方法的性能。结果证实，所提出的方法优于常用的现有扩展方法。
A rapid direct-mode shape expansion methodology is proposed for offshore jacket structures. When sensors are not positioned at an underwater portion of the offshore structure, rapid mode shape expansion techniques should be used for structural damage detection. This work applies a hybrid vector to expand the mode shape. The hybrid vector is constructed by measured values at master degrees of freedom (DOFs) and constant values at slave DOFs based on a series of modification factors. One theoretical development is that the proposed approach is a direct method for unmeasured component estimation, which contrasts with traditional methods. The other development is that the proposed approach is a non-iterative method, which ensures the efficiency of unmeasured mode shape value estimation; a jacket platform is chosen for numerical studies, and the results show that the approach provided a reliable estimation of unmeasured components, even for higher mode shapes, when modelling errors are neglected and the measurement noise is in a certain range. The performance of the proposed method was also investigated using dynamic tests from a steel platform experiment. The results confirm that the proposed method outperforms commonly used existing expansion methods.
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影响因子：
4.1
作者：
Huapeng Chen;N. Bićanić
通讯作者：
Huapeng Chen;N. Bićanić
影响因子：
8.4
作者：
Hu, Sau-Lon James;Li, Huajun;Wang, Shuqing
通讯作者：
Wang, Shuqing
影响因子：
2.5
作者：
M. Papadopoulos;Ephrahim Garcia
通讯作者：
M. Papadopoulos;Ephrahim Garcia
影响因子：
2.5
作者：
Robert L. Kidder
通讯作者：
Robert L. Kidder
DOI：
--
发表时间：
1980-10
期刊：
Journal of the Structural Division
影响因子：
--
作者：
C. A. Miller
通讯作者：
C. A. Miller