【摘要】 在导管架式海洋平台的动力计算中,桩土相互作用的分析是保证计算结果准确的关键一步。本文采用三次样条函数插值和平滑拟合技术,根据单桩动态实验数据测定桩砂相互作用的P-Y曲线,给出回填砂的等效刚度系数,并将其结果应用到导管架式海洋平台模型的固有频率计算中。计算结果与实验结果相符,说明利用单桩动态测定的P-Y曲线获得的回填砂等效刚度系数是可靠的,整个平台模型的计算数学模型是正确的。更多还原

【Abstract】 The pile-sand interaction is an important step in dynamic response analysis of jacket’s offshore platform. This paper presents equivalent stiffness coefficients of backfill sand using cubic spline inserted value method and smoothing average technique by P-Y curves of simple pile. The lateral-stiffness coefficients are applied to natural frequency calculation of jacket’s offshore platform model.These values approach to testing results.This fact shows that the lateral-stiffness coefficients are reliable and calculating model for the offshore platform is correct.更多还原