Health evaluation method and selection method of dredging ship

Abstract

The present application relates to the field of dredging vessels, in particular to a health evaluation method and selection method of a dredging vessel. A health evaluation method of a dredging vessel comprises: obtaining the proportion of the time length of the equipment from the next maintenance in the stable operation cycle; setting the influence factor of the equipment; setting the influence weight of the equipment; obtaining the overall health evaluation coefficient of the ship. A selection method of a dredging vessel comprises: judging the soil condition of the construction area; determining the correction coefficient of the equipment; obtaining the proportion of the time length of the equipment from the next maintenance in the stable operation cycle; setting the influence factor of the equipment; setting the influence weight of the equipment; obtaining the overall health evaluation coefficient of the ship under the soil condition. The method evaluates the health condition of the dredging vessel, controls the dredging vessel according to the evaluation result, understands the current state of each subsystem, evaluates the potential failure risk during construction, and comprehensively masters the health condition of the ship.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of dredging vessels, in particular to a health evaluation method and selection method of a dredging vessel. BACKGROUND

[0002] In high-intensity dredging construction, dredging vessels are subjected to long-term complex alternating loads and erosion of harsh environments, and various structural fatigue damages may occur on the ship body. The analysis of ship structure damage and the evaluation of safety state are crucial for ensuring the safety of construction vessels and construction personnel. Meanwhile, the ship maintenance and spare parts replacement during the construction process will affect the construction period and increase the construction cost.

[0003] During the planning stage before the dredging engineering construction, appropriate dredging vessels need to be selected and dispatched to the project site for construction organization. During the selection of vessels, the project decision-makers need to fully understand the current health status of each dredging vessel, judge its production operation reliability in construction, estimate the maintenance period and predict various potential risks. Therefore, the current health status of the vessel is crucial for the smooth progress of dredging construction and directly affects the project period, cost, etc.

[0004] However, in the current large dredger fleet, the selection and decision of dredging vessels often rely on experience, which has a large blind spot in manual work and brings great decision risk. Since there is no comprehensive digital portrait of dredging vessels, there is a lack of overall state evaluation system for dredging vessels. During the planning stage of dredging construction, it is difficult to make dispatching decisions and maintenance and repair arrangements based on the current health status of each dredging vessel, which has various potential risks and affects the project period.

[0005] Therefore, deep application of business data for real-time evaluation and analysis of the health status of the vessel, and reasonable arrangement of dredging vessel construction selection and dispatching based on the analysis results, has an important influence on improving the application level of dredging engineering construction equipment. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the deficiencies in the prior art and provide a health evaluation method and selection method of a dredging vessel.

[0007] The present application is implemented by the following technical solutions:

[0008] A health evaluation method of a dredging vessel, the health evaluation method comprising the following steps:

[0009] Obtaining the proportion of the time length of each device on the vessel to the next maintenance in the stable operation period;

[0010] According to the frequency of device replacement spare parts, setting the influence factor of each device on the overall health evaluation of the vessel;

[0011] Set the influence weight of each device on the overall health evaluation of the ship;

[0012] According to the proportion of the time length of each device from the next maintenance in the stable operation cycle, the influence factor and the influence weight of each device on the overall health evaluation of the ship, the overall health evaluation coefficient of the ship is obtained.

[0013] Preferably, the calculation formula of the proportion of the time length of the device from the next maintenance in the stable operation cycle is:

[0014] w r = T r / T z

[0015] In the formula, w r is the proportion of the time length of the device from the next maintenance in the stable operation cycle, T r is the time length of the device from the next maintenance, and T z is the time length of the stable operation of the device.

[0016] Preferably, the devices on the ship are divided into two categories: devices with regular replacement spare parts and devices with replacement of spare parts only during the overall maintenance of the ship.

[0017] The influence factor Y a of the device with regular replacement spare parts on the overall health evaluation of the ship is 1.

[0018] The influence factor Y d of the device with replacement of spare parts only during the overall maintenance of the ship on the overall health evaluation of the ship is 1.3.

[0019] The device with regular replacement spare parts needs to replace the spare parts before the overall maintenance of the ship.

[0020] Preferably, in the step of obtaining the overall health evaluation coefficient of the ship according to the proportion of the time length of each device from the next maintenance in the stable operation cycle, the influence factor and the influence weight of each device on the overall health evaluation of the ship, the calculation formula of the overall health evaluation coefficient P of the ship is:

[0021]

[0022] In the formula, w ai is the influence weight of the device with regular replacement spare parts on the overall health evaluation of the ship, w ri is the proportion of the time length of the device with regular replacement spare parts from the next maintenance in the stable operation cycle, w di is the influence weight of the device with replacement of spare parts only during the overall maintenance of the ship on the overall health evaluation of the ship, w ri ′ is the proportion of the time length of the device with replacement of spare parts only during the overall maintenance of the ship from the next maintenance in the stable operation cycle, i is the device number, and Na N is the number of devices that need to be replaced as spare parts on a regular basis d N is the number of devices that need to be replaced only when the ship is maintained as a whole.

[0023] A method for selecting a dredging ship, the method comprising the steps of:

[0024] judging a soil condition of a construction area;

[0025] determining a correction coefficient of each device on the ship according to the soil condition;

[0026] obtaining a proportion of a time length of each device on the ship from a next maintenance in a stable operation period;

[0027] setting an influence factor of each device on a whole health evaluation of the ship according to a frequency of replacement of spare parts of the device;

[0028] setting an influence weight of each device on the whole health evaluation of the ship;

[0029] obtaining a whole health evaluation coefficient of the ship under the soil condition according to the correction coefficient of each device, the proportion of the time length of each device from the next maintenance in the stable operation period, the influence factor of each device on the whole health evaluation of the ship, and the influence weight of each device on the whole health evaluation of the ship.

[0030] Preferably, the construction object of the construction area includes sand and rock;

[0031] When the construction object is sand, the soil condition is determined according to a standard penetration number;

[0032] When the construction object is rock, the soil condition is determined according to a uniaxial saturated compressive strength.

[0033] Preferably, a calculation formula of the proportion of the time length of the device from the next maintenance in the stable operation period is:

[0034] w r = T r / T z

[0035] In the formula, w r is the proportion of the time length of the device from the next maintenance in the stable operation period, T r is the time length of the device from the next maintenance, and T z is a stable operation time length of the device.

[0036] Preferably, the devices on the ship are divided into two categories: devices that need to be replaced as spare parts on a regular basis and devices that need to be replaced only when the ship is maintained as a whole.

[0037] The influence factor Ya of the devices that need to be replaced as spare parts on a regular basis on the whole health evaluation of the ship is 1.

[0038] The influence factor Yd of the equipment replacing spare parts only during the overall maintenance of the ship on the overall health evaluation of the ship is 1.3;

[0039] The equipment replacing spare parts regularly needs to replace spare parts before the overall maintenance of the ship.

[0040] Preferably, in the calculation formula of the overall health evaluation coefficient P of the ship under the soil condition according to the correction coefficient of each equipment, the proportion of the time length of each equipment from the next maintenance in the stable operation period, the influence factor of each equipment on the overall health evaluation of the ship and the influence weight, the overall health evaluation coefficient P of the ship under the soil condition is calculated as follows: j

[0041]

[0042] In the formula, i is the equipment number, j is the soil condition number, w ai is the influence weight of the equipment replacing spare parts regularly on the overall health evaluation of the ship, w ri is the proportion of the time length of the equipment replacing spare parts only during the overall maintenance of the ship from the next maintenance in the stable operation period, w di is the influence weight of the equipment replacing spare parts only during the overall maintenance of the ship on the overall health evaluation of the ship, w ri ′ is the proportion of the time length of the equipment replacing spare parts only during the overall maintenance of the ship from the next maintenance in the stable operation period, N a is the number of the equipment replacing spare parts regularly, N d is the number of the equipment replacing spare parts only during the overall maintenance of the ship, X ij is the correction coefficient of the equipment replacing spare parts regularly numbered i when the soil condition is j, and is the correction coefficient of the equipment replacing spare parts only during the overall maintenance of the ship numbered i when the soil condition is j.

[0043] The beneficial effects of the present application are:

[0044] The present application establishes a set of health evaluation method of dredging ship based on the equipment condition of the dredging ship, evaluates the health condition of the dredging ship according to the method, controls the dredging ship according to the evaluation result, understands the current state of each subsystem, evaluates the potential failure risk during construction, and comprehensively masters the health condition of the ship. It is of great significance for reasonably arranging the maintenance plan, carrying spare parts, and reasonably arranging the construction period during the construction process.

[0045] ​In addition, the dredging ship selection method of the present application selects the most suitable dredging construction ship based on the ship health state evaluation result and the soil condition of the construction area in the early planning stage of the dredging project. The scientificity of selecting the dredging ship in the dredging project is improved, the ship deployment cost is reduced, the ship construction risk and safety hazard are reduced, thereby improving the pre-construction control level of the dredging project and reducing the time cost and economic cost during construction. Further, the potential risk of the equipment can be obtained according to the influence weight of the equipment on the overall health evaluation of the ship and the correction coefficient of the equipment, so as to make preparations according to the potential risk of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a flow chart of a dredging ship health evaluation method of the present application.

[0047] Figure 2 is a time relationship diagram in a dredging ship health evaluation method of the present application.

[0048] Figure 3 is a ship health grade table of a dredging ship health evaluation method of the present application.

[0049] Figure 4 is a flow chart of a dredging ship selection method of the present application.

[0050] Figure 5 is a ship applicability grade table of a dredging ship selection method of the present application. DETAILED DESCRIPTION

[0051] In order to enable the person skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and the best embodiment. All other embodiments obtained by the person skilled in the art on the basis of the embodiments in the present application without creative labor belong to the protection scope of the present application.

[0052] The present application provides a health evaluation method of a dredging ship, which comprises the following steps:

[0053] Referring to Figure 1 , the stable operation time length of the equipment of the dredging ship is set as T z , in other words, the use time length of the equipment reaches T z , and maintenance is needed, which is ship overall maintenance or replacement of spare parts, as shown in Figure 2 .

[0054] The use time length of the equipment is set as T d , and the time length of the equipment to the next maintenance is T r :

[0055] T r =T z -T d

[0056] then the length of time from the device to the next maintenance in the stable operation cycle is w r :

[0057] w r =T r / T z =(T z -T e ) / T z ×100%

[0058] w r as an evaluation coefficient of a device, the greater the value of w r , the higher the health evaluation of the device, and the smaller the value of w r , the lower the health evaluation of the device. Specifically, when w r <30%, a spare part for replacing the device should be carried on the ship; when w r <10%, the device should be immediately maintained.

[0059] Since there are multiple devices on the dredging ship, the evaluation coefficient of each device is set as w ri , where i is the device number.

[0060] The number of devices on the dredging ship is set as N. Among them, a part of the devices are regularly replaced with spare parts, and the number of such devices is set as N a ; another part of the devices are replaced with spare parts only when the ship is overall maintained, and the number of such devices is set as N d .

[0061] N=N a+ N d

[0062] Since the devices regularly replaced with spare parts (the number of which is N a ) are easy to replace spare parts, they have less impact on the overall health evaluation of the ship, so their impact factor Y a is set to 1.

[0063] Since the devices replaced with spare parts only when the ship is overall maintained (the number of which is N d ) are not easy to replace spare parts, they have greater impact on the overall health evaluation of the ship, so their impact factor Y d is set to 1.3.

[0064] According to artificial experience, the weight of each device on the dredging ship is assigned, and the weight value of the device regularly replaced with spare parts is w ai, the equipment weight value of replacing spare parts only during the overall maintenance of the ship is w di , the higher the weight value is, the higher the influence degree on the overall ship health evaluation is.

[0065] Therefore, the evaluation coefficient P of the overall dredging ship is:

[0066]

[0067] The higher the P value is, the higher the ship health evaluation is, and the lower the potential risk in construction is; on the contrary, the lower the ship health evaluation is, the higher the potential risk in construction is. When selecting the construction ship, the ships are arranged from large to small according to the P values of the ships, and the higher the ranking of the ship is, the higher the recommendation degree of the ship is. Further, the ship health grades are divided according to the arrangement order of the P values of the ships. Specifically, the last 30% represents 'to be repaired', the last 30%-50% represents 'poor state', the last 50%-70% represents 'general state', the last 70%-90% represents 'good state', and the first 10% represents 'excellent state', which is shown in Figure 3 .

[0068] The application provides a selection method of a dredging ship, which comprises the following steps:

[0069] Referring to Figure 4 , the soil conditions of the construction area are determined. Specifically, the dredging construction objects are divided into sand and rock, the sand is divided into four conditions according to the standard penetration number N: N<10, 10<N<15, 15<N<30 and N>30, and the rock is divided into four conditions according to the uniaxial saturated compressive strength σ: 0<σ<5, 5<σ<15, 15<σ<30 and 30<σ<40. There are eight soil conditions in total, which are respectively set as G1, G2, G3...G8.

[0070] A set of weight correction coefficients X ij is set for each soil condition by artificial experience, wherein i is the equipment number, and j is the working condition number. Taking G1 as an example, the weight correction coefficient of the equipment numbered 1 is X 11 , the weight correction coefficient of the equipment numbered 2 is X 21 , and the weight correction coefficient of the equipment numbered i is X i1 .

[0071] Therefore, the evaluation coefficient P j of the overall dredging ship under the specific soil condition is:

[0072]

[0073] Then, the ships are arranged from large to small according to the P j values of the ships, and the higher the ranking of the ship is, the higher the recommendation degree of the ship is. Further, the ship health grades are divided according to the arrangement order of the P values of the ships.j The value arrangement order divides the ship applicability level. Specifically, the top 20% represents'very suitable', the 20%-40% represents'more suitable', the 40%-60% represents 'just suitable', the 60%-80% represents 'unsuitable', and the last 20% represents 'extremely unsuitable', see Figure 5 .

[0074] In addition, the potential risk of the equipment can be warned, w ai ×X i1 As the evaluation coefficient of the equipment numbered i, w ai ×X i1 The greater the value is, the higher the health evaluation of the equipment is; w ai ×X i1 The smaller the value is, the lower the health evaluation of the equipment is. Specifically, when w ai ×X i1 <0.3, it is prompted that the replacement spare parts of the equipment should be carried on the ship; when w ai ×X i1 <0.1, it is prompted that the equipment should be maintained immediately.

[0075] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method of health assessment of a dredging vessel, characterized in that, The method comprises the following steps: obtaining the proportion of the time length of each device on the ship from the next maintenance in the stable operation period; setting the influence factor of each device on the overall health evaluation of the ship according to the frequency of replacing spare parts of the device; setting the influence weight of each device on the overall health evaluation of the ship; obtaining the overall health evaluation coefficient of the ship according to the proportion of the time length of each device from the next maintenance in the stable operation period, the influence factor of each device on the overall health evaluation of the ship and the influence weight; the calculation formula of the proportion of the time length of the device from the next maintenance in the stable operation period is: w r = T r / T z ， In the formula, w r is the proportion of the time length of the device from the next maintenance to the stable operation period, T r is the time length of the device from the next maintenance, T z is the time length of the stable operation of the device; The devices on the ship are divided into two categories: devices that need to replace spare parts regularly and devices that only replace spare parts when the ship is maintained as a whole; Periodic replacement of spare parts of the equipment on the ship as a factor of the overall health assessment of the ship Y a is 1; Device for replacing spare parts only during overall maintenance of a ship and influence factor on overall health evaluation of the ship Y d was 1.3; wherein the devices that need to replace spare parts regularly need to replace spare parts before the ship is maintained as a whole; in the step of obtaining the overall health evaluation coefficient of the ship according to the proportion of the time length of each device from the next maintenance in the stable operation period, the influence factor of each device on the overall health evaluation of the ship and the influence weight, the calculation formula of the overall health evaluation coefficient P of the ship is: ， In the formula, the influence weight of the equipment that regularly replaces spare parts on the overall health evaluation of the ship, the proportion of the time length of the equipment that regularly replaces spare parts from the next maintenance in the stable operation cycle, the influence weight of the equipment that replaces spare parts only during the overall maintenance of the ship on the overall health evaluation of the ship, the proportion of the time length of the equipment that replaces spare parts only during the overall maintenance of the ship from the next maintenance in the stable operation cycle, i the equipment number, the number of the equipment that regularly replaces spare parts, the number of the equipment that replaces spare parts only during the overall maintenance of the ship.

2. A method of selecting a dredging vessel, characterized in that, The method comprises the following steps: judging the soil condition of the construction area; determining the correction coefficient of each device on the ship according to the soil condition; obtaining the proportion of the time length of each device on the ship from the next maintenance in the stable operation period; setting the influence factor of each device on the overall health evaluation of the ship according to the frequency of replacing spare parts of the device; setting the influence weight of each device on the overall health evaluation of the ship; obtaining the overall health evaluation coefficient of the ship under the soil condition according to the correction coefficient of each device, the proportion of the time length of each device from the next maintenance in the stable operation period, the influence factor of each device on the overall health evaluation of the ship and the influence weight; the construction object of the construction area comprises sand and rock; when the construction object is sand, the soil condition is determined according to the standard penetration number; when the construction object is rock, the soil condition is determined according to the uniaxial saturated compressive strength; the calculation formula of the proportion of the time length of the device from the next maintenance in the stable operation period is: w r = T r / T z ， In the formula, w r is the proportion of the time length of the device from the next maintenance to the stable operation period, T r is the time length of the device from the next maintenance, T z is the time length of the stable operation of the device; The devices on the ship are divided into two categories: devices that need to replace spare parts regularly and devices that only replace spare parts when the ship is maintained as a whole; Periodic replacement of spare parts of the equipment of the ship as a whole health evaluation of the impact factor Y a is 1; The equipment for replacing spare parts only during the overall maintenance of the ship is an influence factor Y on the overall health evaluation of the ship d is 1.3; wherein the devices that need to replace spare parts regularly need to replace spare parts before the ship is maintained as a whole; "According to the correction coefficient of each device, the proportion of the time length of each device from the next maintenance in the stable operation period, the influence factor and influence weight of each device on the overall health evaluation of the ship, the overall health evaluation coefficient of the ship in the soil condition is obtained" The overall health evaluation coefficient P of the ship in the soil condition j The calculation formula is: ， In the formula, i is the equipment number, j is the soil condition number, is the influence weight of the equipment that needs to be replaced regularly on the overall health evaluation of the ship, is the proportion of the time length of the equipment that needs to be replaced regularly from the next maintenance in the stable operation cycle, is the influence weight of the equipment that needs to be replaced only during the overall maintenance of the ship on the overall health evaluation of the ship, is the proportion of the time length of the equipment that needs to be replaced only during the overall maintenance of the ship from the next maintenance in the stable operation cycle, is the number of equipment that needs to be replaced regularly, is the number of equipment that needs to be replaced only during the overall maintenance of the ship, is the correction coefficient of the equipment that needs to be replaced regularly numbered j when the soil condition is i , and j is the correction coefficient of the equipment that needs to be replaced only during the overall maintenance of the ship numbered i when the soil condition is .

3. A method of selecting a dredging vessel according to claim 2, characterized in that, obtaining the potential risk of the device according to the influence weight of the device on the overall health evaluation of the ship and the correction coefficient of the device.

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