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文章分析了内流对顶张力立管在波浪和海流激励下的动力响应的影响。考虑内部流动流体的动能采用功能原理建立了立管的运动控制方程。然后采用伽辽金有限元法得到了非线性矩阵方程,并在时域内编制了相应的求解程序。最后对立管的动力特性和动力响应进行了详细分析,主要分析了内流等对其的影响。结果发现内流对动力响应有重大影响,其影响在分析中不可忽略。
The paper analyzes the effect of internal flow on the dynamic response of top tensioned risers under wave and ocean currents. Considering the kinetic energy of the internal flowing fluid, the motion governing equation of the riser is established by functional principle. Then using Galerkin finite element method to get the nonlinear matrix equation, and in the time domain prepared the corresponding solution program. Finally, the dynamic characteristics and dynamic response of the riser are analyzed in detail, and the effects of internal flow on it are analyzed. The results show that influx has a significant impact on the dynamic response, the impact of which can not be ignored in the analysis.