深海张力腿非线性动力学分析

深海复杂载荷易引发张力腿涡激振动。考虑涡激载荷、流体阻尼力、预张力和平台运动等耦合作用,根据Hamilton原理建立张力腿空间非线性动力学方程,然后采用有限差分法进行数值求解。考虑南海海况,讨论典型张力腿平台动力响应特点,通过研究可为深海平台的设计和安全运行提供技术参考。

Nonlinear Dynamic analysis of vortex-induced vibration of Tension leg platform in deep sea

TLP(Tension Leg Platform) is an important maritime structure for oil and gas development. Because of the complex condition in the deep sea, vortex induced vibration of tension leg is easily aroused. According to Hamilton theory, nonlinear spatial dynamics equations of tension leg are established considering combined conditions of vortex-induced load, waves, currents, pretension forces and platform motion. Then, the finite difference method is applied to calculate nonlinear dynamic response. The influence of different loading parameters are discussed taking typical TLP in South China sea as example. This research would provide technique support for designing and operating safety of TLP.