| 练继建,李松辉.基于支持向量机和模态参数识别的导墙结构损伤诊断研究[J].水利学报,2008,39(6): |
| 基于支持向量机和模态参数识别的导墙结构损伤诊断研究 |
| Damage diagnosis of spillway guide wall based on support vector machine and modal parameter identification |
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| DOI： |
| 中文关键词: 导墙 模态参数 识别 损伤诊断 支持向量机 |
| 英文关键词: guide wall modal parameter identification damage diagnosis support vector machine |
| 基金项目: |
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| 中文摘要: |
| 水电站厂坝间溢洪道泄槽的导墙结构长期处于水流交变荷载作用，容易造成结构损伤。为对导墙结构的损伤进行有效的定位和评估，本文首先提出一种基于流激振动响应的结构模态参数的遗传识别方法，通过该方法对导墙结构的模态参数进行了识别；然后将有限元计算和支持向量机技术相结合，进行导墙结构的损伤定位和损伤程度评估。结果表明：基于遗传算法的结构模态参数识别方法能够较准确的识别出结构的模态参数，并确定损伤的部位。其结构损伤程度则可通过结构振动频率平方值的变化来评估。 |
| 英文摘要: |
| The guide wall of spillway in hydro project is subject to long term complicated loads, such as alternative water pressure and wind pressure, which may lead to the damage of structures. The genetic identification method for structure modal parameter analysis of induced vibration response is combining with FEM analysis and support vector machine approach to determine the position of damage and evaluate the damage situation. The application to analysis of the guide wall of a spillway shows that the propose method can precisely identify the modal parameters and determine the damage position of the guide wall. The damage situation can be evaluated according to the variation of the square of structural vibration frequency. |
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