液货船稳性计算及校核方法研究

Study on the Stability Calculation and Checking of Liquid Cargo Ships

在现有船舶稳性计算方法的基础上,分析了各种船舶稳性计算的特点,包括船舶的浮态、静稳性、动稳性、初稳性、大倾角稳性和气象衡准。考虑到液货船舶的纵倾和自由液面对船舶浮性和船舶稳性的影响,探讨任意载况下自由液面对稳性曲线修正的计算方法,实现了液货船稳性曲线修正的实时计算。最后以一艘大型LNG船舶为例,对该船舶在港时的浮态、静稳性进行了计算,并与该船的装载手册进行了对比,验证了所述计算方法的精度和可行性。

Base on the existing calculation method of ship stability, this article analyzes the various stability calculation of liquid cargo ship, which conclude the calculations of floating condition, statical stability, dynamical stability, initial stability, high inclination-angle stability and weather criterion. The influence of trimming and free surface to floating condition and stability of liquid cargo ship are considered, a calculation method of stability curve correction for free liquid at any loading condition is proposed, which achieves a real-time calculation of stability curve correction for liquid cargo ship. A large LNG carrier is taken as an example, its floating condition and statical stability are calculated with this method under the harbor condition. The results are compared with those provided in the loading manual of the ship, which verified the precision and feasibility of the proposed calculation method.