中文摘要：

本研究依据波浪辐射和绕射理论,采用高阶边界元方法并考虑了半潜式采油平台几何形状的对称性,得到了特征波向和波浪频率下半潜平台湿表面的流体波动压力分布。研究中首先将半潜平台有限元建模、运动参数计算以及边界元数据输出统一成一个有机整体,并在半潜平台的复杂直角边和角点处发展了双重和多重节点重置的新方法,该方法极大的提高了波浪压力分析的准确性和高频波浪计算的数值稳定性。

英文摘要：

Based on wave radiation and diffraction theory,in this paper,we apply a higher-order boundary element method（ HOBEM） and consider symmetry to calculate the wave pressure distributions of Semi-submersibles for definite wave directions and frequencies. First,we used an integral system containing an FEM Semi-submersible model,calculated the hydrodynamic motion coefficients,and exported the data for BEM analysis. We then applied a newly developed multiple and double node relocation method coupled with the FEM / BEM data transformation along the complicated sharp edges and corners of a Semi-submersible. This algorithm significantly improves the accuracy of wave pressure analysis and the numerical stability of high-frequency wave calculations.