采用两步式模型修正过程识别海上风电支撑结构的损伤

发布时间：2018-01-07 22:25

本文关键词：采用两步式模型修正过程识别海上风电支撑结构的损伤　出处：《海洋工程》2016年03期 　论文类型：期刊论文

【摘要】：针对海上风电支撑结构损伤识别的难点,将一种新的模型修正方法应用到了三脚架式海上风电支撑结构的损伤识别中。采用数学上常用的正则化方法,解决了实测模态含噪声条件下损伤识别"病态"方程组的求解问题;结合Guyan扩阶技术,实现了基于低阶不完备模态的损伤识别。另外,为提高损伤识别精度,结合算例提出一种两步式模型修正过程:第一步,初步定位损伤位置;第二步,精确识别损伤位置和损伤程度。数值研究结果表明,采用两步式模型修正过程的方法对于海上风电支撑结构的损伤识别是有效的。
[Abstract]:Aiming at the difficulty of damage identification of offshore wind power support structure, a new model correction method is applied to the damage identification of offshore wind power support structure with tripods. The regularization method commonly used in mathematics is adopted. In this paper, the problem of solving the "ill-conditioned" equations of damage identification under the condition that the measured modes contain noise is solved. In order to improve the accuracy of damage identification, a two-step model modification process is proposed in order to improve the accuracy of damage identification, which is the first step. Initial location of injury; In the second step, the damage location and damage degree are accurately identified. The numerical results show that the two-step model correction method is effective for the damage identification of offshore wind support structures.
【作者单位】：鲁东大学土木工程学院;中国海洋大学工程学院;
【基金】：国家自然科学基金项目(51379196,51209189) 山东省自然科学基金项目(ZR2013EEQ006) 泰山学者工程专项经费鲁东大学科研基金项目(LY2013027)
【分类号】：P75
【正文快照】： 海上风电支撑结构长期作用在复杂的海洋环境中,除了要承受风机荷载外,还将受到波浪、流、风,甚至冰击、船的撞击和台风、地震等极端荷载的作用,另外结构本身还要遭到环境腐蚀、海生物附着、海底冲刷、复杂海床变化等影响。在此环境下,结构容易产生各种各样的损伤,使得结构整体

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