中文摘要：

以海底细长柔性管跨结构为研究对象,分析了当管外流体流经管道时产生涡激振动的动力学特性及其相关影响参数。为了考察海底管跨的振动响应,将尾流振子模型与管跨的振动方程相结合,得到了流固耦合系统的振动响应分别由两个变量为管跨位移和尾流举升力的偏微分方程描述。使用van der Pol非线性振子模拟作用在管跨上的振动尾流,通过实例的计算与分析,确定几个重要参数对管跨振动响应的影响程度。

英文摘要：

Submarine slight and flexible pipeline span structure is studied in this paper. The dynamic characteristics of vortex-induced vibration when liquid flows around the pipeline and the parameters that affect the characteristcs are analyzed. In order to exam the vibration response of submarine pipeline span, the wake oscillator model and the vibration equation of pipeline span are combined, result indi- cates that the vibration response of the fluid-solid interaction should be described by partial differential equation with two variables for pipeline displacement and wake lift force fluid-solid interaction. Using the van der pol nonlinear vibrator to simulate vibrating wake on the pipeline span, several important parameters that affect the vibration response of the pipeline span are determined through calculation and analysis of examples.