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| 裂纹管的振动特性研究 | |
| 引用本文： | 刘朵,朱彤,周晶,赵习刚. 裂纹管的振动特性研究[J]. 中国海洋平台, 2012, 27(2): 20-24,40 |
| 作者姓名： | 刘朵 朱彤 周晶 赵习刚 |
| 作者单位： | 1. 江苏省交通科学研究院,江苏,210017 2. 大连理工大学,大连,116024 3. 南京市政设计研究院有限责任公司,江苏,210008 |
| 基金项目： | 江苏省自然基金项目资助（BK2009028）;交通行业联合科技攻关项目（2009-353-332-300）. |
| 摘 要： | 采用奇异单元模拟裂纹尖端的奇异性，无摩擦接触单元模拟裂纹的张开闭合效应，建立舍有方向裂纹的裂纹管有限元模型。基于此模型研究裂纹方向对裂纹管固有频率的影响，针对悬臂裂纹管和简支裂纹管，分析简谐荷载作用下的非线性动力特性，重点讨论裂纹方向对系统超谐共振的影响，并量化裂纹方向角变化所引起的谐波分量的差异。 |
| 关 键 词： | 奇异单元 接触单元 裂纹方向 固有频率 超谐共振 |
Study on Vibration Characteristics of a Pipe with a Crack |
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| LIU Duo , ZHU Tong , ZHOU Jing , ZHAO Xi-gang. Study on Vibration Characteristics of a Pipe with a Crack[J]. China offshore Platform, 2012, 27(2): 20-24,40 | |
| Authors: | LIU Duo ZHU Tong ZHOU Jing ZHAO Xi-gang |
| Affiliation: | 1. Jiangsu Transportation Research Institute Co. , Ltd, Jiangsu 210017, China 2. Dalian University of Technology, Dalian 116024, China;3. Nanjing Municipal Design and Research Institute Co. , Ltd, Nanjing 210008, China) |
| Abstract: | A finite element model of a pipe with an oriented crack is established with a quarter-point element which is used to simulate the crack tip singularity and a frictionless contact element to simulate crack opening-closing effects. Based on the proposed model, the effects of crack direction on the natural frequency of the crack pipe are discussed. Moreover, for the cantilever crack pipe, the nonlinear dynamic behavior under the harmonic loads is ana- lyzed, and the super-harmonic resonance of the system affected by the crack direction is researched in detail. The difference of harmonic response component caused by the crack angle is quantified also. |
| Keywords: | quarter-point element contact element crack direction natural frequency super-harmonic resonance |
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