【摘要】 海底管线管跨段的涡激振动，是引发海底管线失效的主要因素之一。尤其是管跨在涡激振动下的“频率锁定”现象，是导致管线断裂失效的主要原因，也是在设计和维护管理中必须要避免的状态。影响管跨涡激振动响应规律的因素很复杂，因此，模型实验是研究和探索其规律的主要手段。为了探索海流运动对管跨动力响应的影响规律，在实验水槽中，分别对管跨在稳定流和随机流的作用下，管跨的动力响应规律进行了测定。本文在对实验结果进行了分析的基础上，总结了“频率锁定”现象出现的条件，提出了在海底管线的可靠性设计和管理中应采取的相应措施。更多还原

【Abstract】 The spans’ vortex induced vibration is a main factor resulting in failure of submarine pipeline, especially when the" frequency locking in" occurs. In general, the effect factors are very complicated, therefore, the test research is an important measure to determine the response law. In order to research spans’ dynamic response law under vortex induced vibration, a test is done in a flume, in which the span model is under the action of steady current and random current. This paper presents a summary on dynamic response law and condition of "frequency locking in "based on the test results.更多还原