| 海洋平台中梁的裂纹诊断方法 |
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| 引用本文： | 居桦桦,赵德有,李志强. 海洋平台中梁的裂纹诊断方法[J]. 中国海洋平台, 2007, 22(2): 28-31,36 |
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| 作者姓名： | 居桦桦 赵德有 李志强 |
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| 作者单位： | 大连理工大学,大连,116023 |
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| 摘 要： | 基于振动诊断方法,将修正的线弹簧模型引入到铁木辛柯梁传递矩阵法中,计算出梁损伤前后的振动信息。利用振动信息,提出振型差值曲率方法,来诊断梁的裂纹位置和裂纹深度,研究证明,此方法可供梁的裂纹诊断参考。
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| 关 键 词： | 结构振动 传递矩阵 裂纹诊断 |
| 文章编号： | 1001-4500（2007）02-0028-04 |
| 修稿时间： | 2006-11-26 |
VIBRATION DIAGNOSING METHOD OF BEAM CRACK IN OFFSHORE PLATFORM |
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| JU Huahua,ZHAO Deyou,LI Zhiqiang. VIBRATION DIAGNOSING METHOD OF BEAM CRACK IN OFFSHORE PLATFORM[J]. China offshore Platform, 2007, 22(2): 28-31,36 |
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| Authors: | JU Huahua ZHAO Deyou LI Zhiqiang |
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| Affiliation: | Dalian University of Technology, Dalian 116023, China |
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| Abstract: | Plate,beam are the basic components of the offshore platform.If they occur to have some cracks,it will lead to the accident of offshore platform.Beam's stiffness will change due to the appearance of the cracks.Therefore,based on the vibration diagnosing method,this paper applies the line-spring model to the Timoshenko beam transfer matrix method for the first time in order to calculate the vibration information of beam before or after the damages.By using the vibration information,this paper puts forward the vibration-margin curvature method to diagnose the position and depth of beam cracks,and studies have shown that this method is feasible for the diagnosis of beam cracks to refer. |
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| Keywords: | structure vibration transfer matrix method crack diagnosis |
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