The invention provides a ship pollution bottom evaluation method and system, and the method comprises the steps: firstly obtaining ship model test data obtained through a ship model test, collecting ship data, meteorological data and navigation state data during the navigation of a ship at set intervals, dividing all the collected data according to a certain time interval, and obtaining a plurality of data sets; then screening each data set to obtain a data set meeting a preset condition, calculating wind power increased resistance and water temperature increased resistance by adopting a specific calculation method, predicting wave increased resistance by adopting a BP neural network, and further calculating the corrected shaft power of the still water main engine; and calculating a dirty bottom average coefficient according to the corrected still water main engine shaft power, the original main engine shaft power in the ship model test data and the total number of data in the data set, comparing the dirty bottom average coefficient with a preset threshold value, and cleaning the ship dirty bottom when the dirty bottom average coefficient is greater than the preset threshold value. And the accuracy and safety of evaluation can be effectively improved.
本发明提供了船舶污底评估方法及系统,先获取船模试验测得的船模试验数据,且每隔一段时间分别采集船舶航行时的船舶数据、气象数据和航行状态数据,并将采集到的所有数据按照一定时间间隔划分得到多个数据集,再对每个数据集进行筛选,筛选出满足预设条件的数据集,再采用特定的计算方法计算出风力增阻和水温增阻,并采用BP神经网络预测出波浪增阻,进而计算出修正后的静水主机轴功率,根据修正后的静水主机轴功率、船模试验数据中的原始主机轴功率以及数据集中的数据总条数计算出污底平均系数,并将污底平均系数与预设阈值进行比对,当污底平均系数大于预设阈值时对船舶污底进行清洗,能够有效增加评估的准确性和安全性。
Ship dirt bottom evaluation method and system
一种船舶污底评估方法及系统
2023-11-07
Patent
Electronic Resource
Chinese
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |
Ship pollution bottom monitoring evaluation method and evaluation system
European Patent Office | 2020
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