Ship performance evaluation method, device and equipment

Abstract

The invention provides a ship performance evaluation method, device and equipment. The method comprises the following steps: acquiring target environment data and target ship performance data during ship operation; determining the actual delivery oil consumption rate according to the target ship performance data; determining the corrected oil consumption rate of the environment according to the target environment data and the target ship performance data; determining a reference delivery oil consumption rate according to the received ship model data and trial flight data; determining a comprehensive energy efficiency index of the ship according to the reference delivery oil consumption rate, the actual delivery oil consumption rate and the corrected oil consumption rate of the environment; and evaluating the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result. The influence of factors such as environment and operation in an actual test is eliminated, the actual performance of the ship can be reflected, and the method has important significance on energy conservation and emission reduction of the ship.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and also relates to a method, device and equipment for evaluating the performance of ships. Background Art

[0002] Regular maintenance of ships is crucial for reducing the performance degradation caused by marine organism attachment, which not only helps to reduce the greenhouse gas emissions of the global fleet, but also cuts the operating costs of ships. However, due to the high cost of ship maintenance, shipowners are often cautious about frequent maintenance. Therefore, an effective performance index is needed to monitor the hydrodynamic performance changes of ships, so as to optimize the maintenance plan.

[0003] In the prior art, multiple indicators for evaluating the performance changes of ships have been proposed, such as the Energy Efficiency Operational Indicator (EEOI), Annual Efficiency Ratio (AER), etc. However, these indicators are easily affected by various factors such as weather, logistics, operation mode, ship speed, loading conditions, and ship maintenance status (such as hull and propeller fouling, damage, antifouling paint, etc.), resulting in the rating results not being able to truly reflect the energy-saving level and actual performance of ships. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method, device and equipment for evaluating the performance of ships, so as to improve the accuracy of ship performance evaluation.

[0005] To solve the above technical problem, the technical solution of the present invention is as follows:

[0006] In the first aspect of the present invention, a method for evaluating the performance of a ship is provided, including:

[0007] Obtaining target environmental data and target ship performance data during ship operation;

[0008] Determining the actual delivered fuel consumption rate according to the target ship performance data;

[0009] Determining the corrected fuel consumption rate of the environment according to the target environmental data and the target ship performance data;

[0010] Determining the reference delivered fuel consumption rate according to the received ship model data and sea trial data;

[0011] Determining the ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate and the corrected fuel consumption rate of the environment;

[0012] Evaluating the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

[0013] Optionally, obtaining target environmental data and target ship performance data during ship operation includes:

[0014] Obtain a preset sliding window;

[0015] Determine the standard deviation of environmental data according to the preset sliding window and the initial environmental data;

[0016] Determine the standard deviation of ship performance data according to the preset sliding window and the initial ship performance data;

[0017] Obtain stable environmental data according to the standard deviation of environmental data and the preset environmental standard deviation limit;

[0018] Obtain stable ship performance data according to the standard deviation of ship performance data and the preset ship performance standard deviation limit;

[0019] Obtain target environmental data and target ship performance data according to the stable environmental data, the stable ship performance data and the preset filtering criteria.

[0020] Optionally, determine the actual delivered fuel consumption rate according to the target ship performance data, including:

[0021] According to the target ship performance data and 、 Determine the actual delivered fuel consumption rate;

[0022] Wherein, is the actual delivered fuel consumption rate, is the shaft power in the target ship performance data, Q is the torque in the target ship performance data, PRM is the shaft revolution speed in the target ship performance data, FC is the fuel consumption, is the transmission efficiency of the shaft in the target ship performance data, and T is the measurement duration.

[0023] Optionally, determine the environmental corrected fuel consumption rate according to the target environmental data and the target ship performance data, including:

[0024] According to the target environmental data and ,Determine the resistance caused by the environment;

[0025] According to the resistance caused by the environment, the target ship performance data and ,Determine the environmental corrected fuel consumption rate;

[0026] Wherein, ;

[0027] Wherein, is the resistance caused by the environment, is the resistance caused by irregular waves in the target environmental data, is the resistance caused by wind in the target environmental data, is the resistance caused by temperature in the target environmental data, is the corrected fuel consumption rate of the environment, is the speed through water in the target ship performance data, is the total ship efficiency in the target ship performance data, is the fuel consumption caused by the change in resistance, is the corrected power of the environment.

[0028] Optionally, according to the received ship model data and sea trial data, determine the reference delivered fuel consumption rate, including:

[0029] Receive ship model data and sea trial data;

[0030] According to the difference between the ship model data and the sea trial data, correct the ship model data to obtain the corrected ship model data;

[0031] According to the corrected ship model data and the sea trial data, determine the reference delivered fuel consumption rate.

[0032] Optionally, according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, and the corrected fuel consumption rate of the environment, determine the ship comprehensive energy efficiency index, including:

[0033] According to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, the corrected fuel consumption rate of the environment, and , determine the ship comprehensive energy efficiency index;

[0034] wherein, SCEI is the ship comprehensive energy efficiency index, is the actual delivered fuel consumption rate, is the corrected fuel consumption rate of the environment, is the reference delivered fuel consumption rate.

[0035] Optionally, according to the ship comprehensive energy efficiency index and a preset index threshold, evaluate the ship performance to obtain a ship performance evaluation result, including:

[0036] According to the ship comprehensive energy efficiency index and the preset index threshold, obtain the ship performance level;

[0037] According to the ship performance level and the pre-stored ship maintenance data, obtain a ship maintenance plan;

[0038] According to the ship comprehensive energy efficiency index, the preset index threshold, the ship performance level, and the ship maintenance plan, evaluate the ship performance to obtain a ship performance evaluation result.

[0039] The second aspect of the present invention provides an apparatus for evaluating ship performance, including:

[0040] An acquisition module, configured to acquire target environmental data and target ship performance data during ship operation;

[0041] A processing module, configured to determine an actual delivered fuel consumption rate according to the target ship performance data; determine a corrected fuel consumption rate of the environment according to the target environmental data and the target ship performance data; determine a reference delivered fuel consumption rate according to received ship model data and sea trial data; determine a ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, and the corrected fuel consumption rate of the environment; and evaluate the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

[0042] In a third aspect of the present invention, there is provided a computing device, including: a processor and a memory storing a computer program, and when the computer program is run by the processor, it executes the method described in the first aspect.

[0043] In a fourth aspect of the present invention, there is provided a computer-readable storage medium storing instructions, and when the instructions are run on a computer, the computer is caused to execute the method described in the first aspect.

[0044] The above solution of the present invention at least includes the following beneficial effects:

[0045] The above solution of the present invention, by acquiring target environmental data and target ship performance data during ship operation, determines an actual delivered fuel consumption rate, a reference delivered fuel consumption rate, and a corrected fuel consumption rate of the environment, calculates a ship comprehensive energy efficiency index, and finally evaluates the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result, eliminating the influence of factors such as environment and operation in actual tests, being able to reflect the actual performance of the ship, and having important significance for ship energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a flowchart of the method for evaluating ship performance in an embodiment of the present invention;

[0047] Figure 2 is a structural diagram of the device for evaluating ship performance in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0049] AsFigure 1 As shown in Figure 1 , an embodiment of the present invention provides a method for evaluating the performance of a ship, including the following steps:

[0050] Step 101: Obtain the target environmental data and target ship performance data during ship operation;

[0051] Step 102: Determine the actual delivered fuel consumption rate according to the target ship performance data;

[0052] Step 103: Determine the environmental corrected fuel consumption rate according to the target environmental data and the target ship performance data;

[0053] Step 104: Determine the reference delivered fuel consumption rate according to the received ship model data and sea trial data;

[0054] Step 105: Determine the ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, and the environmental corrected fuel consumption rate;

[0055] Step 106: Evaluate the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

[0056] The method for evaluating the performance of a ship proposed in the embodiment of the present invention obtains the target environmental data and target ship performance data during ship operation, determines the actual delivered fuel consumption rate, the reference delivered fuel consumption rate, and the environmental corrected fuel consumption rate, calculates the ship comprehensive energy efficiency index, and finally evaluates the ship performance according to the ship comprehensive energy efficiency index and the preset index threshold to obtain a ship performance evaluation result, eliminating the influence of factors such as environment and operation in actual tests, being able to reflect the actual performance of the ship, and having important significance for ship energy conservation and emission reduction.

[0057] In an alternative embodiment of the present invention, step 101 includes:

[0058] Step 1011: Use a collection device installed on the ship to obtain the initial environmental data and initial ship performance data during ship operation.

[0059] Specifically, data can be collected according to the items and collection frequencies in the collection data table shown in Table 1. In specific implementation, in addition to the data in Table 1, other data can also be collected according to the actual situation, and the data in Table 1 is only for illustrative purposes.

[0060] Table 1 Collection Data Table Item Sampling Frequency Unit Route Input per Route - Sampling Time Real-time Sampling UTC Latitude Real-time Sampling Degree (°) Longitude Real-time Sampling Degree (°) Shaft Power Real-time Sampling Kilowatt (kW) Shaft Speed Real-time Sampling Revolutions per Minute (r / min) Course Real-time Sampling Degree (°) Ship Position Coordinates Real-time Sampling Degree (°), Minute (′), Second (″) Calculation Date Real-time Sampling Year / Month / Day Water Temperature Real-time Sampling Degree Celsius (℃) Wind Speed Real-time Sampling Meter per Second (m / s) Wind Direction Real-time Sampling Degree (°) Wave Height Real-time Sampling Meter (m) Wave Direction Real-time Sampling Degree (°) Wave Period Real-time Sampling Second (s) Speed over Ground Real-time Sampling Knot (kn) Speed through Water Real-time Sampling Knot (kn) Water Depth Real-time Sampling Meter (m) Displacement Real-time Sampling Ton (t) Forward Draft Real-time Sampling Meter (m) Aft Draft Real-time Sampling Meter (m) Fuel Consumption Real-time Sampling Kilogram per Hour (kg / h) Fuel Consumption Rate Real-time Sampling Gram per Kilowatt-hour (g / kWh)

[0061] Step 1012: Obtain a preset sliding window;

[0062] Specifically, different time periods can be set according to different data, and then the size of the preset sliding window can be determined. For example, in a specific embodiment, the time period is 15 minutes, and each window will contain data points within 15 minutes. As shown in Table 2, the size of the corresponding preset sliding window can be set according to the time period corresponding to the type or name of the parameter (such as shaft speed or ship heading, etc.) (represented as the time period in Table 2):

[0063] Table 2 Sliding Windows Corresponding to Each Parameter Parameter Preset Standard Deviation Limit Accuracy Time Period [min] Shaft Speed Quasi-steady State Filter 1 r / min 15 Ship Course 2 Degrees 0.1 Degree 30 Water Temperature 0.5℃ 0.1℃ 60 Relative Wind Speed 15% of Average Wind Speed (m / s) 0.1 m / s 30 Relative Wind Direction 10 Degrees 1 Degree 60 Significant Wave Height 0.15 m 0.01 m 30 Primary Relative Wave Direction 10 Degrees 1 Degree 60 Primary Wave Period 0.5s 0.1s 60 Ground Speed 0.1 m / s 0.1 m / s 30 Underwater Speed 0.1 m / s 0.1 m / s 30

[0064] Step 1013: Determine the environmental data standard deviation according to the preset sliding window and the initial environmental data; determine the ship performance data standard deviation according to the preset sliding window and the initial ship performance data;

[0065] Specifically, the initial ship performance data and the initial ship performance data are data sequences collected from various sensors in the acquisition device. The data has the characteristics of a time series, that is, the data is arranged in chronological order. Then, select an appropriate window size. The window cannot be too large, otherwise it will contain too much non-steady-state data, affecting the judgment of local stability; nor can it be too small, otherwise it cannot fully capture the statistical characteristics of the data. Generally, it needs to be determined according to the characteristics of the data and the analysis purpose. The initial window time period is as shown in Table 2. Then, determine the step size of each sliding window. A smaller step size can observe the changes in the data more carefully, but the calculation amount will increase; a larger step size may ignore some data details. Usually, a step size related to the window size can be selected, such as 1 / 4 or 1 / 2 of the window size. Then, for the data within each sliding window, calculate the relevant statistics. Commonly used statistics include mean, variance, standard deviation, etc.

[0066] Specifically, starting from the starting point of the initial environmental data or the initial ship performance data, calculate the standard deviation within the preset sliding window. The standard deviation is an important indicator to measure the volatility of the data. A smaller standard deviation means that the data is more stable. Taking the shaft speed in Table 2 as an example, the size of its corresponding preset sliding window is 15 minutes. Starting from the starting point within the acquired shaft speed data set, calculate the standard deviation of the data from the first to the 15th shaft speed in this window. Similarly, for other parameters in the initial environmental data and the standard deviation of the initial ship performance data, the environmental data standard deviation (including the standard deviations of various parameter data) and the ship performance data standard deviation (including the standard deviations of various parameter data) can be calculated.

[0067] Step 1014: Obtain the stable environmental data according to the environmental data standard deviation and the preset environmental standard deviation limit;

[0068] Specifically, compare the calculated standard deviation with a preset standard deviation limit value. If the calculated standard deviation is less than or equal to the preset standard deviation limit value, the data within this window is stable and can be used as stable environmental data. Taking the water temperature in Table 2 as an example, if the standard deviation within a window (corresponding window size is 60) is 0.1 °C, which is less than the preset standard deviation limit value of 0.5 °C, the data within this window can become the data in the stable environmental data. By sliding the window, slide the window forward (or backward) by the time interval of one data point (for example, if there is one data point per minute, slide for one minute), and repeat the steps of calculating the standard deviation and comparing the standard deviation with the preset standard deviation limit value to obtain stable data until all the data sets are processed, and stable environmental data can be obtained. The same applies to other parameters in the environmental data, and stable data for different parameters in the environmental data can be obtained. All the stable data is used as stable environmental data. It should be noted that the preset environmental standard deviation limit value includes the preset standard deviation limit values corresponding to each parameter in the environmental data. For example, the preset standard deviation limit value corresponding to the water temperature is 0.5 °C, and the preset standard deviation limit value corresponding to the relative wind speed is 15% of the average wind speed (m / s), etc.

[0069] Step 1015, obtain stable ship performance data according to the standard deviation of the ship performance data and the preset ship performance standard deviation limit value;

[0070] Specifically, compare the calculated standard deviation of the ship performance data with the corresponding preset ship performance standard deviation limit value. If the calculated standard deviation is less than or equal to the preset ship performance standard deviation limit value, the data within this window is stable and can be used as stable ship performance data. Taking the ship's heading in the ship performance data in Table 2 as an example, if the standard deviation within a window (corresponding window size is 30) is 1, which is less than the preset standard deviation limit value of 2 degrees, the data within this window can become the data in the stable ship performance data. By sliding the window, slide the window forward (or backward) by the time interval of one data point (for example, if there is one data point per minute, slide for one minute), and repeat the steps of calculating the standard deviation and comparing the standard deviation with the preset standard deviation limit value to obtain stable data until all the data sets are processed, and stable ship performance data can be obtained. The same applies to other parameters in the ship performance data, and stable data for different parameters in the ship performance data can be obtained. All the stable data is used as stable ship performance data. The preset standard deviation limit values corresponding to the shaft speed and the ship's heading in Table 2 can be set according to the requirements of the quasi-steady state filter. It should be noted that the preset ship performance standard deviation limit value includes the preset standard deviation limit values corresponding to each parameter in the ship performance data. For example, the preset standard deviation limit value corresponding to the ship's heading is 2 degrees, and the preset standard deviation limit value corresponding to the ground speed is 0.1 m / s, etc.

[0071] Step 1016: Obtain target environmental data and target ship performance data according to the stable environmental data, the stable ship performance data, and a preset filtering criterion.

[0072] Specifically, to eliminate the influence of some special situations, such as steering and shallow water effect, and ensure the stability of the data, it is necessary to filter the data. The data that does not meet the preset filtering criterion can be deleted, and the remaining data is used as the target environmental data and the target ship performance data. For example, for the water depth parameter in the stable environmental data, the water depth parameter less than or equal to 80 meters is deleted. For the difference parameter between the underwater speed and the ground speed in the stable ship performance data, the difference parameter between the underwater speed and the ground speed that does not meet 0.5 knots is deleted.

[0073] As shown in Table 3, the preset filtering criteria for some environmental data and some ship performance data are as follows:

[0074] Table 3 Preset Filtering Criteria Parameter Limit (Preset Filtering Standard) Water Depth > 80 m Water Speed >Section 11.54 & <Section 15.2 Wind Speed <7.9 m / s Relative Wind Direction (0 and 360 Degrees Indicate Headwind) <70 degrees & (110, 250) degrees &> 290 degrees Significant Wave Height < 3 meters Main Wave Direction (0 and 360 Degrees Indicate Head Wave) <65 degrees & (115, 245) degrees> 295 degrees Difference between Underwater Speed and Ground Speed 0.5 Knot

[0075] In an alternative embodiment of the present invention, Step 103 includes:

[0076] Determine the actual delivered fuel consumption rate according to the target ship performance data and 、 ;

[0077] Wherein, is the actual delivered fuel consumption rate, is the shaft power in the target ship performance data, Q is the torque in the target ship performance data, PRM is the shaft revolution speed in the target ship performance data, FC is the fuel consumption, is the transmission efficiency of the shaft in the target ship performance data, and T is the measurement duration.

[0078] Here, the measurement duration T, the fuel consumption FC, and the transmission system power can all be measured. The transmission efficiency of the shaft is generally set to 0.99, which mainly depends on the location of the sensor. If it is close to the propeller, it is set to 1.00. Actually, it is generally on the intermediate shaft, and 0.99 is taken.

[0079] In an alternative embodiment of the present invention, Step 104 includes:

[0080] Step 1041: Determine the resistance caused by the environment according to the target environmental data and ;

[0081] Step 1042: Determine the corrected fuel consumption rate of the environment according to the resistance caused by the environment, the target ship performance data, and ;

[0082] Among them, ; among which, is the resistance caused by the environment, including wind, waves and the resistance change caused by temperature, is the resistance caused by irregular waves in the target environmental data, is the resistance caused by wind in the target environmental data, is the resistance caused by temperature in the target environmental data, is the corrected fuel consumption rate of the environment, is the speed through water in the target ship performance data, which is the speed of the ship relative to the water and can be directly measured using a Doppler velocimeter or an electromagnetic velocimeter, etc., is the total ship efficiency in the target ship performance data, including hull efficiency, relative rotative efficiency and ship open water efficiency, which can be obtained from ship model tests, , is the hull efficiency, is the rotative efficiency, is the open water efficiency, is the fuel consumption caused by the resistance change, is the corrected power of the environment.

[0083] Specifically, the purpose of calculating the corrected fuel consumption rate of the environment is to eliminate the influence of weather such as waves, wind, water temperature, etc. from the total resistance.

[0084] Among them, the method for determining the resistance caused by irregular waves can be carried out according to ITTC7.5 - 02 - 07 - 02.2, and a sea condition holding test is carried out in regular waves with constant wave height or steepness, different wavelengths and directions, and different speeds. Irregular waves can be expressed as the linear superposition of regular wave components. Therefore, through the linear superposition of the directional wave spectrum E and the regular wave mean resistance increase response function Rwave, the average resistance increase of short - crested irregular waves Raw can be calculated. The resistance caused by irregular waves should use a cleaning threshold to remove the high - power contribution cases from the increased resistance in the waves. When the sea waves are very high, the additional resistance in the waves will also be very large, and the uncertainty of the wave resistance model will also be very large. So a threshold of wave resistance can be set. If the power caused by wave resistance accounts for more than 20% of the total power or the wave height exceeds 3m, it is regarded as data that needs to be excluded.

[0085] Among them, the resistance caused by wind can be calculated by the following formula:

[0086] ;

[0087] Among them, is the resistance caused by wind, is the air density, is the wind resistance coefficient, is the wind direction, is the maximum cross-sectional area exposed to the wind, is the relative wind speed, where 0 indicates headwind, is the speed over the ground.

[0088] Among them, the resistance caused by temperature can be calculated by the following formula:

[0089] ;

[0090] Among them, is the resistance caused by temperature in the target environmental data, is the total resistance under the reference water temperature and reference water density, is the seawater density at the actual water temperature, is the seawater density at the reference temperature, which is , is the frictional resistance under the actual water temperature and actual water density, is the frictional resistance coefficient under the reference water temperature and reference water density, is the frictional resistance coefficient under the actual water temperature and actual water density, is the roughness margin related to the Reynolds number corresponding to the actual water temperature and salinity, is the roughness margin related to the Reynolds number corresponding to the reference water temperature and salinity.

[0091] To reduce uncertainty and complexity, for the influence of other factors, since the power change caused by trim is very small in practice, its influence is ignored, and the power changes caused by the shallow water effect and steering are filtered during data preprocessing and not calculated.

[0092] In an optional embodiment of the present invention, step 105 includes:

[0093] Step 1051, receiving the ship model data and the sea trial data;

[0094] Specifically, the ship model data is the data obtained from the ship model test of a ship model geometrically similar to the actual ship designed and manufactured according to the ship design. The ship model data can include key parameters such as the speed, thrust, and torque of the ship model corresponding to different loading conditions, such as light ballast, heavy ballast, full load, and full load at structural draft conditions. It can also include the water flow speed, water depth, wind direction, wave conditions, etc. (such as a calm water surface without wind and waves, and the water temperature is 15°C); the sea trial data is the data of the speed, thrust, torque, water flow speed, water depth, wind direction, wave conditions, etc. collected during the sea trial of the actual ship corresponding to the ship model test.

[0095] Step 1052: Modify the model ship data according to the difference between the model ship data and the trial voyage data to obtain the modified model ship data;

[0096] Specifically, the effective power of the model ship can be calculated respectively according to the model ship data and wherein, is the effective power of the model ship, is the thrust in the model ship data (which can be calculated from the torque and propeller speed in the model ship data), is the propeller efficiency in the model ship data. Taking the ship speed as the abscissa and the effective power as the ordinate, draw the power curves under different loading conditions; according to wherein, is the modified power, is the effective power of the model ship, is the effective power of the trial voyage (which can be obtained by multiplying the thrust and the propeller efficiency in the trial voyage data).

[0097] Among them, the model conditions refer to the water flow speed, water depth, wind direction, wave conditions, etc. in the model data; the trial voyage conditions refer to the water flow speed, water depth, wind direction, wave conditions, etc. in the trial voyage data; the actual conditions refer to the water flow speed, water depth, wind direction, wave conditions, etc. in the target data (an expected environmental state data).

[0098] Step 1053: Determine the reference delivered fuel consumption rate according to the modified model ship data and the trial voyage data.

[0099] Specifically, obtain the ship speed and deadweight from the modified model ship data and the trial voyage data; then calculate the reference delivered fuel consumption rate through wherein, is the reference delivered fuel consumption rate, , , are all regression coefficients, V is the ship speed, and W is the deadweight (expressed by the displacement ).

[0100] In an optional embodiment of the present invention, Step 106 includes:

[0101] Determine the ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, the modified fuel consumption rate of the environment and ;

[0102] wherein, SCEI is the ship comprehensive energy efficiency index, is the actual delivered fuel consumption rate, is the modified fuel consumption rate of the environment, is the reference delivered fuel consumption rate.

[0103] Specifically, the Ship Comprehensive Energy Efficiency Index (SCEI) refers to the power ratio required for an operating ship relative to a clean hull and a polished propeller under the reference conditions of a specific ship draft and speed. The Ship Comprehensive Energy Efficiency Index calculated based on the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, and the environmentally corrected fuel consumption rate can account for and adjust relevant operating factors and weather impacts, eliminating the influence of factors such as the environment and operation in actual tests, which is conducive to improving the accuracy of subsequent assessments of the actual performance of ships.

[0104] In an alternative embodiment of the present invention, step 107 includes:

[0105] Step 1071, obtaining the ship performance level according to the Ship Comprehensive Energy Efficiency Index and a preset index threshold;

[0106] Specifically, the preset index threshold can be obtained based on the Ship Comprehensive Energy Efficiency Indexes of multiple ships. As the ship operation time increases, the Ship Comprehensive Energy Efficiency Index will become higher. By comparing the Ship Comprehensive Energy Efficiency Index with the preset index threshold, the ship performance level can be obtained. In a specific embodiment, as shown in Table 4, it is the ship performance level corresponding to the preset index threshold. According to this table, the ship performance level corresponding to the Ship Comprehensive Energy Efficiency Index can be found, so as to facilitate subsequent assessment of the ship performance based on this level. If the Ship Comprehensive Energy Efficiency Index is 5, the obtained ship performance level is good; if the Ship Comprehensive Energy Efficiency Index is 10, the obtained ship performance level is poor. It should be noted that this embodiment is only for illustrative purposes. In actual implementation, other preset index thresholds and corresponding ship performance levels can also be set.

[0107] Table 4 Ship Performance Levels Corresponding to the Preset Index Threshold Preset Index Threshold Ship Performance Grade 5 Good 10 Poor

[0108] Step 1072, obtaining the ship maintenance plan according to the ship performance level and the pre-stored ship maintenance data;

[0109] Specifically, the pre-stored ship maintenance data can include different ship maintenance plans adopted for different ship performance levels within a historical time period. According to the ship performance level, the corresponding ship maintenance plan is found from the pre-stored ship maintenance data. In a specific embodiment, if the ship performance level is good, only daily maintenance is required; if the ship performance level is poor, the hull and propeller need to be cleaned to improve the ship performance. It should be noted that the ship performance levels and ship maintenance plans in Table 5 are only for illustrative purposes. In actual implementation, other ship performance levels and corresponding ship maintenance plans can also be set.

[0110] Table 5 Ship Performance Levels Corresponding to the Preset Index Threshold Ship Performance Grade Ship Maintenance Plan Good Daily Maintenance Poor Perform Hull and Propeller Cleaning

[0111] Step 1073, evaluate the ship performance according to the ship integrated energy efficiency index, the preset index threshold, the ship performance level, and the ship maintenance plan to obtain a ship performance evaluation result.

[0112] Specifically, the evaluation result can be a ship performance evaluation report, and the evaluation result includes the ship integrated energy efficiency index, the preset index threshold, the ship performance level, and the ship maintenance plan, which is convenient for users to intuitively and comprehensively understand the process and data basis for evaluating the ship performance and improve user satisfaction. In specific implementation, a template of a ship performance evaluation report can be set, and the ship integrated energy efficiency index, the preset index threshold, the ship performance level, and the ship maintenance plan are filled into the template to form the final evaluation result, which is beneficial to improving the efficiency of the method.

[0113] A specific embodiment of the ship performance evaluation method proposed in the embodiment of the present invention includes:

[0114] Step 111, obtain data;

[0115] Collect the initial environmental data and initial ship performance data of the ship during operation through various sensors or other data collection tools and equipment installed on the ship. The data can be collected at a fixed cycle or for each voyage segment. The data within one cycle or voyage segment is taken as a group, and the ship integrated energy efficiency index within the group is calculated. Finally, the average value of the ship integrated energy efficiency indexes of all groups is taken as the final ship integrated energy efficiency index to evaluate the ship performance.

[0116] Among them, the initial environmental data may include water temperature, relative wind speed, relative wind direction, significant wave height, primary relative wave direction, primary wave period, water depth, water speed, wind speed, wave direction, resistance caused by irregular waves, resistance caused by wind, resistance caused by temperature, etc.; the initial ship performance data may include shaft speed, ship heading, ground speed, underwater speed, shaft power, torque, transmission efficiency of the shaft, speed over water, total ship efficiency, etc.

[0117] Step 112, data preprocessing;

[0118] Since the importance levels of different data vary, in order to reduce the uncertainty of subsequent SCEI calculations, data preprocessing is considered from aspects such as data accuracy, data sampling frequency, and data processing. For data with a very high importance level such as ship speed and shaft power, higher requirements are set for the accuracy and sampling frequency of data collection. At the same time, in order to ensure the quality of sampled data, as stable data as possible should be adopted. Therefore, the sliding window method shown in Table 2 can be used to evaluate data stability, and the stable data can be intercepted; for some parameters with relatively high importance, simple standard deviation filtering can be used, and the stability within the window period can be directly judged by giving a threshold to filter the data. To eliminate the influence of some special situations, such as steering and shallow water effects, and ensure data stability, physical filtering methods can be used to eliminate data under some relatively extreme conditions, such as filtering the data according to the preset filtering criteria given in Table 3.

[0119] Step 113, calculate the actual delivered fuel consumption rate ;

[0120] The actual delivered fuel consumption rate can also be called the actual delivered power, which is the actual delivered power of the propeller during operation. This power consists of two parts. One part is the power consumed by propelling the ship and the resistance of a conventional ship (such as the wind resistance, frictional resistance, etc. when there is no wind, no waves, and the water temperature is 15°C), and the other part is the additional consumption caused by the increase in resistance due to the uncertainty of objective wind, waves, and water temperature. Therefore, this part of the factor needs to be eliminated.

[0121] The actual delivered fuel consumption rate is usually measured on an operating ship, usually by measuring the shaft power , with the unit of kW. It can be measured in combination with torque and speed. The torque has the unit of kN·m. Combining the rotational speed of the shaft per minute or per second RPM / RPS, the shaft power can be calculated through .

[0122] The transmission efficiency of the shaft is generally set to 0.99, mainly depending on the location of the sensor. If it is close to the propeller, it is set to 1.00. In practice, it is generally on the intermediate shaft, and 0.99 is taken.

[0123] Torque measurement can refer to strain sensors. The shaft rotation speed (RPM) is required to be the number of revolutions per minute RPM or the number of revolutions per second RPS. These two data can generally be provided on an operating ship. These two elements directly determine the accuracy. Therefore, the data quality requirements are relatively high, and special attention should be paid to torque and data with a high change rate of RPM during data cleaning.

[0124] Measured shaft power , measurement duration T, fuel consumption FC and transmission efficiency Calculate the actual delivered fuel consumption rate :

[0125] .

[0126] Step 114, calculate the corrected fuel consumption rate of the environment ;

[0127] The corrected fuel consumption rate of the environment, that is, the corrected power of the environment. The purpose of environmental correction is to eliminate the influence of weather such as waves, wind, and water temperature from the total resistance. The corrected power of the environment is: According to the resistance caused by the environment, the target ship performance data and , determine the corrected fuel consumption rate of the environment;

[0128] Among them, ;

[0129] Among them, is the resistance caused by the environment, is the resistance caused by irregular waves in the target environmental data, is the resistance caused by wind in the target environmental data, is the resistance caused by temperature in the target environmental data, is the corrected fuel consumption rate of the environment, is the speed through water in the target ship performance data, is the total ship efficiency in the target ship performance data, is the fuel consumption caused by resistance change, is the corrected power of the environment.

[0130] Among them, the method for determining the resistance caused by irregular waves can be carried out according to ITTC7.5 - 02 - 07 - 02.2, by conducting sea condition holding tests in regular waves with constant wave height or steepness, different wavelengths and directions, and different speeds. Irregular waves can be expressed as a linear superposition of regular wave components. Therefore, by linearly superposing the directional wave spectrum E and the regular wave mean resistance increase response function Rwave, the average resistance increase of short - crested irregular waves Raw can be calculated. The resistance caused by irregular waves should use a cleaning threshold to remove the high - power contribution cases from the resistance increased by waves. When the sea waves are very high, the additional resistance in the waves will also be very large, and the uncertainty of the wave resistance model will also be very large. So, a threshold for wave resistance can be set. If the power caused by wave resistance accounts for more than 20% of the total power or the wave height exceeds 3m, the data is considered as data to be excluded.

[0131] Among them, the resistance caused by wind can be calculated by the following formula:

[0132] ;

[0133] Among them, is the resistance caused by the wind, is the air density, is the wind resistance coefficient, is the wind direction, is the maximum cross-sectional area exposed to the wind, is the relative wind speed, 0 indicates headwind, is the speed over the ground.

[0134] Among them, the resistance caused by temperature can be calculated by the following formula:

[0135] ;

[0136] Among them, is the resistance caused by temperature in the target environmental data, is the total resistance under the reference water temperature and reference water density, is the seawater density at the actual water temperature, is the seawater density at the reference temperature, which is , is the frictional resistance under the actual water temperature and actual water density, is the frictional resistance coefficient under the reference water temperature and reference water density, is the frictional resistance coefficient under the actual water temperature and actual water density, is the roughness margin related to the Reynolds number corresponding to the actual water temperature and salinity, is the roughness margin related to the Reynolds number corresponding to the reference water temperature and salinity.

[0137] Step 115, calculate the reference delivery fuel consumption rate ;

[0138] The reference delivery fuel consumption rate is very important basic data, which is obtained through ship model tests and sea trials. It represents the ideal conditions of a clean hull and a polished propeller, and also represents the ideal conditions of the environment of wind, waves, currents and temperature. The ideal state is a calm water surface without wind and waves, and the water temperature is 15°C. The ship model data is corrected using sea trial data to obtain the power under several different speeds and loading conditions. For the actual loading and draft, interpolation is used to obtain it. For the obtaining, it can be seen that the more working conditions calculated in the ship model test, the more stable the sea trial conditions, and the higher the quality of the sea trial data, the lower its uncertainty and the higher the data validity. Therefore, at least four loading conditions should be included, preferably with ballast conditions, loading conditions and some intermediate conditions.

[0139] Step 116, calculate the Ship Comprehensive Energy Efficiency Index SCEI;

[0140] Input the calculated reference delivery fuel consumption rate, actual delivery fuel consumption rate, and environmental corrected fuel consumption rate into the formula , to obtain the Ship Comprehensive Energy Efficiency Index (SCEI).

[0141] Step 117, Ship performance assessment.

[0142] When assessing the ship performance, first determine the ship performance level according to the Ship Comprehensive Energy Efficiency Index and the preset index threshold, then determine the corresponding ship maintenance plan according to the level, and finally fill in the Ship Comprehensive Energy Efficiency Index, preset index threshold, ship performance level, and ship maintenance plan into the template according to the preset template to form the final assessment result for the user to view conveniently.

[0143] The ship performance assessment method proposed in the embodiment of the present invention eliminates the influence of factors such as environment and operation in actual tests by accounting and adjusting relevant operation factors and weather impacts, and reflects the actual performance of the ship. The Ship Comprehensive Energy Efficiency Index (SCEI) corrects relevant operation and weather impacts, isolates the ship technical performance, and more accurately reflects the ship performance change, which has important significance for ship energy conservation and emission reduction. It is mainly reflected in: optimizing the ship maintenance plan and reducing energy consumption: during the operation of the ship, due to the attached dirt generated by the hull and propeller, the resistance increases and additional power is generated, resulting in a performance decline. The SCEI indicates the degree of performance decline during operation. Since keeping the hull and propeller smooth and clean can improve the operation efficiency and save fuel. Therefore, the value of SCEI can be used as the basis for whether the ship needs to clean the hull and propeller.

[0144] In another specific embodiment, a trained fuel consumption rate prediction model is used to obtain the fuel consumption rate after eliminating the environmental impact, that is and , to obtain the Ship Comprehensive Energy Efficiency Index (SCEI).

[0145] Among them, first reset the environmental data such as wind, wave, water temperature, and density of the fused data to the reference value under the still water state, and set various resistance increases to 0; then input the reset data into the fuel consumption rate prediction model to output the fuel consumption rate after eliminating the environmental impact.

[0146] Among them, the training process of the fuel consumption rate prediction model includes:

[0147] Fuse the preprocessed static ship data, meteorological and sea conditions data, ship navigation data, and various resistance increase data. Match the meteorological and sea conditions data, ship navigation data, and various resistance increase data according to time, longitude, and latitude, and match the static ship data according to the ship's MMSI number (Maritime Mobile Service Identity) or IMO number (International Maritime Organization Identification Number). Finally, fuse the static ship data, meteorological and sea conditions data, ship navigation data, various resistance increase data, etc. into a basic data as the training data for the preset network model.

[0148] Determine the structure of the neural network, including the number of neurons in the input layer, hidden layer, and output layer. The number of neurons in the input layer is usually the same as the number of independent variables after being transformed by PLSR (Partial Least Squares Regression). The number of neurons in the output layer is the same as the number of dependent variables. The number of hidden layers and neurons needs to be adjusted and optimized according to specific problems.

[0149] Select appropriate activation functions, such as Sigmoid (S-shaped function), Tanh (hyperbolic tangent function), etc. Determine the optimization algorithm, such as Stochastic Gradient Descent (SGD), Adagrad (Adaptive Gradient Algorithm), etc., for updating the weights of the neural network. Then input the independent variables and corresponding dependent variables of the training set into the preset network model for training. During the training process, continuously adjust the weights of the neural network in the preset network model according to the selected optimization algorithm to minimize the loss function. Commonly used loss functions include Mean Squared Error (MSE), Cross-Entropy Loss, etc.

[0150] Use the test set to evaluate the trained fuel consumption rate prediction model, calculate the evaluation metrics. When the evaluation metrics meet the preset metrics, the training ends and the fuel consumption rate prediction model is obtained. Among them, the evaluation metrics can be Root Mean Square Error (RMSE), Mean Absolute Error (MAE), Coefficient of Determination ( ), etc., to measure the prediction performance of the model. As Figure 2 shown, an embodiment of the present invention proposes an evaluation device 200 for ship performance, including:

[0151] An acquisition module 201, configured to acquire target environment data and target ship performance data during ship operation;

[0152] A processing module 202, configured to determine the actual delivered fuel consumption rate according to the target ship performance data; determine the corrected fuel consumption rate of the environment according to the target environment data and the target ship performance data; determine the reference delivered fuel consumption rate according to the received ship model data and sea trial data; determine the ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, and the corrected fuel consumption rate of the environment; and evaluate the ship performance according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

[0153] Optionally, obtain the target environmental data and target ship performance data during ship operation, including:

[0154] Obtain a preset sliding window;

[0155] Determine the standard deviation of environmental data according to the preset sliding window and initial environmental data;

[0156] Determine the standard deviation of ship performance data according to the preset sliding window and initial ship performance data;

[0157] Obtain stable environmental data according to the standard deviation of environmental data and the preset environmental standard deviation limit;

[0158] Obtain stable ship performance data according to the standard deviation of ship performance data and the preset ship performance standard deviation limit;

[0159] Obtain the target environmental data and target ship performance data according to the stable environmental data, the stable ship performance data and the preset filtering criteria.

[0160] Optionally, determine the actual delivered fuel consumption rate according to the target ship performance data, including:

[0161] According to the target ship performance data and 、 Determine the actual delivered fuel consumption rate;

[0162] Wherein, is the actual delivered fuel consumption rate, is the shaft power in the target ship performance data, Q is the torque in the target ship performance data, PRM is the shaft revolution speed in the target ship performance data, FC is the fuel consumption, is the transmission efficiency of the shaft in the target ship performance data, and T is the measurement duration.

[0163] Optionally, determine the corrected fuel consumption rate of the environment according to the target environmental data and the target ship performance data, including:

[0164] According to the target environmental data and , determine the resistance caused by the environment;

[0165] According to the resistance caused by the environment, the target ship performance data and , determine the corrected fuel consumption rate of the environment;

[0166] Wherein, ;

[0167] Wherein, is the resistance caused by the environment, is the resistance caused by irregular waves in the target environmental data, is the resistance caused by wind in the target environmental data, is the resistance caused by temperature in the target environmental data, is the corrected fuel consumption rate of the environment, is the speed through water in the target ship performance data, is the total ship efficiency in the target ship performance data, is the fuel consumption caused by the change in resistance, is the corrected power of the environment.

[0168] Optionally, according to the received model ship data and sea trial data, determine the reference delivered fuel consumption rate, including:

[0169] Receive the model ship data and sea trial data;

[0170] According to the difference between the model ship data and the sea trial data, correct the model ship data to obtain the corrected model ship data;

[0171] According to the corrected model ship data and the sea trial data, determine the reference delivered fuel consumption rate.

[0172] Optionally, according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate and the corrected fuel consumption rate of the environment, determine the ship comprehensive energy efficiency index, including:

[0173] According to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate, the corrected fuel consumption rate of the environment and , determine the ship comprehensive energy efficiency index;

[0174] wherein, SCEI is the ship comprehensive energy efficiency index, is the actual delivered fuel consumption rate, is the corrected fuel consumption rate of the environment, is the reference delivered fuel consumption rate.

[0175] Optionally, according to the ship comprehensive energy efficiency index and the preset index threshold, evaluate the ship performance to obtain the ship performance evaluation result, including:

[0176] According to the ship comprehensive energy efficiency index and the preset index threshold, obtain the ship performance grade;

[0177] According to the ship performance grade and the pre-stored ship maintenance data, obtain the ship maintenance plan;

[0178] According to the ship comprehensive energy efficiency index, the preset index threshold, the ship performance grade, the ship maintenance plan, evaluate the ship performance to obtain the ship performance evaluation result.

[0179] The ship performance evaluation device proposed in the embodiments of the present invention determines the actual delivery fuel consumption rate, the reference delivery fuel consumption rate, and the environmental corrected fuel consumption rate by obtaining the target environmental data and the target ship performance data during ship operation, calculates the ship comprehensive energy efficiency index, and finally evaluates the ship performance according to the ship comprehensive energy efficiency index and the preset index threshold to obtain the ship performance evaluation result. It eliminates the influence of factors such as environment and operation in actual tests, can reflect the actual performance of the ship, and has important significance for ship energy conservation and emission reduction.

[0180] It should be noted that this device corresponds to the above method. All implementation manners in the above method embodiments are applicable to the embodiments of this device and can achieve the same technical effects. Details are not described again in this embodiment.

[0181] The embodiments of the present invention also provide a computing device, including: a processor and a memory storing a computer program. When the computer program is run by the processor, it executes the method described in any one of the above embodiments. All implementation manners in the above method embodiments are applicable to the embodiments of this device and can achieve the same technical effects. Details are not described again in this embodiment.

[0182] The embodiments of the present invention also provide a computer-readable storage medium, on which instructions are stored. When the instructions are run on a computer, the computer is made to execute the method described in any one of the above embodiments. All implementation manners in the above method embodiments are applicable to the embodiments of this device and can achieve the same technical effects. Details are not described again in this embodiment.

[0183] It should be noted that in the device and method of the present invention, obviously each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to execute in chronological order. Some steps can be executed in parallel, crosswise, or independently of each other.

[0184] It should be noted that in the above embodiments, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element. In addition, it should be pointed out that the scope of the methods and devices in the above-described embodiments of the implementation manner is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0185] The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for evaluating ship performance, characterized in that: include: Acquire target environment data and target ship performance data during ship operation; Determine the actual delivered fuel consumption rate based on the target ship performance data; Determining an environmentally corrected fuel consumption rate according to the target environmental data and the target ship performance data; Determine the reference delivery fuel consumption rate based on the received ship model data and sea trial data; Determining a comprehensive energy efficiency index of the ship according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate and the corrected fuel consumption rate of the environment; The ship performance is evaluated according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

2. The method for evaluating ship performance according to claim 1, characterized in that: Obtain target environment data and target ship performance data during ship operation, including: Get the preset sliding window; Determining a standard deviation of environmental data according to the preset sliding window and the initial environmental data; Determining a standard deviation of the ship performance data according to the preset sliding window and the initial ship performance data; Obtaining stable environmental data according to the environmental data standard deviation and a preset environmental standard deviation limit; Obtaining stable ship performance data according to the ship performance data standard deviation and a preset ship performance standard deviation limit; According to the stable environment data, the stable ship performance data and preset filtering criteria, target environment data and target ship performance data are obtained.

3. The method for evaluating ship performance according to claim 1, characterized in that: Based on the target ship performance data, determine the actual delivered fuel consumption rate, including: Based on the target ship performance data and , Determine actual delivered fuel consumption; in, is the actual delivered fuel consumption rate, is the shaft power in the target ship performance data, Q is the torque in the target ship performance data, PRM is the shaft revolutions in the target ship performance data, FC is the fuel consumption, is the transmission efficiency of the shaft in the target ship performance data, and T is the measurement time.

4. The method for evaluating ship performance according to claim 1, characterized in that: Determining the corrected fuel consumption rate of the environment according to the target environment data and the target ship performance data includes: Based on the target environment data and , determine the resistance caused by the environment; According to the resistance caused by the environment, the target ship performance data and , determine the corrected fuel consumption rate for the environment; in, ; in, It is the resistance caused by the environment. is the resistance caused by irregular waves in the target environment data, is the resistance caused by the stroke in the target environment data, is the resistance caused by temperature in the target environment data, is the environmentally corrected fuel consumption, is the water speed in the target ship performance data, is the total ship efficiency in the target ship performance data, is the fuel consumption caused by the change in resistance. is the correction power of the environment.

5. The method for evaluating ship performance according to claim 1, characterized in that: Determine the reference delivery fuel consumption rate based on the received ship model data and sea trial data, including: Receive ship model data and sea trial data; According to the difference between the ship model data and the sea trial data, the ship model data is corrected to obtain corrected ship model data; A reference delivery fuel consumption rate is determined based on the corrected ship model data and the sea trial data.

6. The method for evaluating ship performance according to claim 1, characterized in that: Determining a ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate and the environmental corrected fuel consumption rate includes: According to the reference delivery fuel consumption rate, the actual delivery fuel consumption rate, the corrected fuel consumption rate of the environment and , determine the comprehensive energy efficiency index of ships; Among them, SCEI is the ship comprehensive energy efficiency index, is the actual delivered fuel consumption rate, is the environmentally corrected fuel consumption, It is the reference delivery fuel consumption rate.

7. The method for evaluating ship performance according to claim 1, characterized in that: The ship performance is evaluated according to the ship comprehensive energy efficiency index and the preset index threshold, and the ship performance evaluation result is obtained, including: Obtaining a ship performance level according to the ship comprehensive energy efficiency index and a preset index threshold; Obtaining a ship maintenance plan according to the ship performance level and pre-stored ship maintenance data; The ship performance is evaluated according to the ship comprehensive energy efficiency index, the preset index threshold, the ship performance level, and the ship maintenance plan to obtain a ship performance evaluation result.

8. A device for evaluating ship performance, characterized in that: include: An acquisition module, used to acquire target environment data and target ship performance data when the ship is running; A processing module, used to determine the actual delivered fuel consumption rate according to the target ship performance data; determine the corrected fuel consumption rate of the environment according to the target environment data and the target ship performance data; determine the reference delivered fuel consumption rate according to the received ship model data and sea trial data; determine the ship comprehensive energy efficiency index according to the reference delivered fuel consumption rate, the actual delivered fuel consumption rate and the corrected fuel consumption rate of the environment; The ship performance is evaluated according to the ship comprehensive energy efficiency index and a preset index threshold to obtain a ship performance evaluation result.

9. A computing device, characterized in that include: A processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method according to any one of claims 1 to 7 is performed.

10. A computer-readable storage medium, characterized in that: Instructions are stored, and when the instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 7.

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