﻿ 数据库技术在船舶破舱稳定性计算中的应用
 舰船科学技术  2024, Vol. 46 Issue (5): 167-170    DOI: 10.3404/j.issn.1672-7649.2024.05.031 PDF

1. 石家庄学院 理学院，河北 石家庄 050035;
2. 石家庄学院 未来信息技术学院，河北 石家庄 050035

Application of database technology in the calculation of ship damaged stability
GUO Peng1, FENG Jiu2
1. College of Science, Shijiazhuang University, Shijiazhuang 050035, China;
2. College of Future Information Technology, Shijiazhuang University, Shijiazhuang 050035, China
Abstract: The calculation of ship damage stability varies with the type of ship, space, number of people and collision position. At present, a unified calculation model has not been established to realize the calculation of ship damage stability, and the calculation amount of damage stability is large, so the established calculation model is rather complicated. This paper proposes to use database technology and cloud platform technology to establish a comprehensive cloud computing platform for ship rupture stability, fully study the calculation process of probabilistic ship rupture stability, calculate the subdivision index and probability factor, use database technology to achieve data storage and query related to the calculation of rupture stability, and open up the interface of all application, storage and computing terminals. The calculation model of ship damage stability is optimized through the performance monitoring of cloud platform.
Key words: damage stability     database technology     cloud platform     distributed computing     calculation model
0 引　言

1 概率性计算破舱稳定性

1）模型优化

2）计算工具优化

 图 1 船舶破损前后浮态对比 Fig. 1 Comparison of floating state of ship before and after damage
1.1 分舱指数计算

 $R = \left\{ \begin{array}{ll} 0.697，& num < 400，\\ \dfrac{{num}}{{7580}} + 0.669，& 400 \leqslant num \leqslant 1350，\\ 0.037\cdot Ln(num + 89) + 0.586，& 1350 \leqslant num \leqslant 4000 ，\\ 1 - \dfrac{{854 + 0.039\cdot num}}{{num + 5000}} ，& num > 4000 。\end{array} \right.$

A的计算方法如下所示：

 $A = 0.2{A_l} + 0.4{A_{{p}}} + 0.4{A_{{s}}} \text{。}$

 图 2 船舶吃水状态示意图 Fig. 2 Draft diagram of ship

dldpds的值会根据客船类型、吨位、客船载客人数等的变化而变化。在船舶破损后，A的计算式为：

 $A = \sum {{p_i}} {s_i} 。$

1.2 概率因数的计算

 图 3 船舶纵向分舱破损示意图 Fig. 3 Breakdown diagram of ship longitudinal subdivision

 图 4 船舶横向分舱破损示意图 Fig. 4 Diagram of ship's lateral subdivision damage

 ${p_i} = p({y_{1j}},{y_{2j + m - 1}}) - p({y_{1j}},{y_{2j + m}}) - p({y_{1j}},{y_{2j + m + 1}}) \text{。}$

 $J{}_n = \frac{{1 - \sqrt {(1 - 2{p_n}){b_0}{J_m} + 1/4b_0^2J_m^2 + 1} }}{{{b_0}}} + {J_m}/2 \text{。}$

 ${b_0} = 2\left( - \frac{{1 - {p_k}}}{{{J_{\max }} - {J_{nm}}}} + \frac{{{p_n}}}{{{J_{nm}}}}\right) 。$
2 船舶破舱稳定性计算系统 2.1 数据库技术在船舶破舱稳定性计算中的应用

1）计算量大

2）模型复杂

2.2 云计算平台构建

 图 5 云计算平台构建 Fig. 5 Cloud computing platform construction

1）综合能力开放平台

2）云平台性能监控

3）应用层

3 结　语

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