舰艇特殊进水过程的流量差值迭代算法研究

目前,在进行静水情况下的破损舰艇进水过程中的姿态计算时,通常使用流量差值迭代算法。然而,该算法的使用有一定的局限性。对于存在进满水舱室的特殊进水过程,破口流线的伯努利方程将发生改变,这导致了不能使用目前的迭代公式进行计算。因此,本文以该特殊的进水过程为对象,在对流线伯努利方程修正的基础上,利用隐函数求导模型和克莱姆法则,对此时的流量差值迭代算法进行了建模,并对该算法进行了船模实验验证。最后,针对某船的进水过程进行了仿真计算,横倾角时域变化曲线上的不连续点直观地表明了流量差值迭代算法的改变对进水过程仿真计算的影响。

Research on Volumetric Flow Error Iteration Arithmetic in Especial Flooding Process

When the ship pose index in the calm flooding process is calculated, the volumetric flow error iteration arithmetic will be used. But the arithmetic is partial. When the flooding process contains cabin that is all filled with water, the Bernoulli equation will change and the volumetric flow error iteration arithmetic will be disabled. So, the volumetric flow error iteration arithmetic of especial flooding process is founded using implicit function differential model and cramer rule based on the modification of Bernoulli equation. The ship model experiment is done to validate the modified arithmetic. At last, a given ship flooding process is calculated and the discontinuity point of heel angle to time curve displays the influence of vlumetric flow error iteration modification on flooding progress simulation.