| 多元结构损伤识别的曲率模态分析及数值仿真 |
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| 引用本文： | 李范春,李成,张爱锋.多元结构损伤识别的曲率模态分析及数值仿真[J].船舶力学,2006,10(6):115-121. |
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| 作者姓名： | 李范春 李成 张爱锋 |
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| 作者单位： | 大连海事大学机电与材料工程学院,辽宁,大连,116026;哈尔滨工程大学建筑工程学院,哈尔滨,150001 |
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| 摘 要： | 应用改进的曲率模态分析方法对具有多处结构损伤的简支梁结构进行了损伤识别,通过数值计算得到了简支梁的曲率模态,由此结果可以确定出损伤单元及位置.由于曲率模态法对结构损伤的识别不敏感,所以文中提出了曲率模态差这一新的概念,思想是通过对曲率模态差的突变研究来判定损伤结构中损伤单元的位置.通过算例分析,其识别效果明显优于曲率模态法.
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| 关 键 词： | 多元损伤 损伤识别 模态分析 曲率模态 曲率模态差 |
| 文章编号： | 1007-7294(2006)06-0115-07 |
| 收稿时间： | 2006-08-09 |
| 修稿时间： | 2006年8月9日 |
Curvature Modal Analysis and Numerical Simulation in Diverse Structural Damage Identification |
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| LI Fan-chun,LI Cheng,ZHANG Ai-feng.Curvature Modal Analysis and Numerical Simulation in Diverse Structural Damage Identification[J].Journal of Ship Mechanics,2006,10(6):115-121. |
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| Authors: | LI Fan-chun LI Cheng ZHANG Ai-feng |
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| Institution: | 1 Electromechanics and Materials Engineering College, Dalian Maritime University, Dalian 116026, China ; 2 College of Civil Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | The several damage sites of a simply supported beam structure are identified by using curvature mode method.The curvature mode of simply supported beam is given through numerical computatcon. As a result, the sure damage site is made. But curvature mode method is not sensitive to the nearby damage. Therefore, a new concept i.e. curvature mode difference is put forward. The idea of curvature mode difference is made sure structure damage site through the mutation of curvature mode difference.Through calculation example the better results comparing with curvature mode method are obtained. |
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| Keywords: | diverse damage damage identification modal analysis curvature mode curvature mode difference |
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