深水管道在动力载荷作用下的局部压溃特性研究

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摘要管道在深水环境中易遭受外压和动力载荷的联合作用，该状态下结构的局部压溃特性还有待与深入探索。建立了管道数值模型，模拟结构屈曲过程并得到临界动力载荷幅值；对影响管道局部屈曲的动力载荷频率、外压大小、管道长度、初始椭圆度缺陷等敏感性因素进行了分析。结果表明，管道截面壳振动使管道承载能力下降是诱发局部压溃的主因，动力载荷对管道的危害大于静力载荷，动力载荷频率接近于截面壳振动频率最易引发局部压溃，管道长度降低可以大大降低动力作用下局部压溃的可能性。

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	赵保磊1
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	余建星1
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	孙震洲1
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	高静坤3
	刘浩3

关键词 ：深水管道, 管道压溃, 动力载荷, 数值模拟

Abstract：Pipe in deep water usually suffers the combined effect of both external pressure and dynamic load. The local collapse behavior in this state remains to be explored. In this paper, a pipeline numerical model was established. The buckling process was simulated and the critical dynamic load amplitude was obtained. In addition, the sensitivity factors, such as the frequency of dynamic load, the value of the external pressure, the length of the pipe, and the initial ovality degree, were analyzed. Results showed that the decrease of the bearing capacity of the pipeline caused by the vibration of the pipe cross section is the main cause of the local pressure collapse. The harm of dynamic load to pipeline is greater than static load, and the local collapse more easily happens when the frequency of dynamic load is close to the natural frequency of the section shell. The possibility of local collapse under the dynamic action can be greatly reduced by decreasing the pipe’s length.

Key words： deep water pipe pipe collapse dynamic loading numerical simulation.

收稿日期: 2016-03-29 出版日期: 2017-08-28

引用本文:

赵保磊1,2，余建星1,2，孙震洲1,2，高静坤3，刘浩3. 深水管道在动力载荷作用下的局部压溃特性研究[J]. 振动与冲击, 2017, 36(17): 104-110.
Zhao Bao-lei1,2，Yu Jian-xing1,2，Sun Zhen-zhou1,2，Gao Jing-kun3，LIU Hao3. Research on Local Pressure Collapse Characteristics of Deep Water Pipeline Under Dynamic Loading. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(17): 104-110.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2017/V36/I17/104

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