围海工程堵口水力仿真计算中设计潮型插值方法

Study on Interpolation Methods of Design Pattern of Tidal Level in Hydraulic Simulation for Coast Reclamation Closure

在围海工程堵口水力仿真计算中,设计潮型插值问题较为突出,影响计算结果。采用抛物插值和3次样条插值法,对同一组堵口设计潮型进行插值,对比拟合效果。结果表明,抛物插值有明显间断,3次样条插值则能较好地模拟出堵口设计潮型的连续波动过程,提高了围海堵口水力仿真计算的精度和稳定性。

In the hydraulic simulation of sea reclamation closure, the i flterpolating problem of design pattern of tidal level is prominent, and it impacts the computed results as well. The methods of parabolic interpolation and cubic spline interpolation are adopted in this paper to interpolate the same set of design pattern of tidal level in closure work, and compare the fitting effects. The results indicated that the parabolic interpolation led to obvious discontinuity. However, cubic spline interpolation simulated the continuous-wave processes of design pattern of tidal level for closure work well and also improved the accuracy and stability of the hydraulic simulation of closure work in coast reclamation.