Simulation analysis method and device for hydraulic characteristics of double-line ship lock water delivery system

Abstract

The invention discloses a simulation analysis method and device for hydraulic characteristics of a double-line ship lock water delivery system. The analysis method comprises the steps that a ship lock water delivery mathematical model is established; a difference and iteration method is adopted to simulate and solve the ship lock water delivery mathematical model, and a hydraulic characteristic value is obtained; establishing a physical model of the water delivery system of the double-line ship lock, and obtaining an actually measured hydraulic characteristic value by adopting the physical model of the water delivery system of the double-line ship lock; comparing the actually measured hydraulic characteristic value with the hydraulic characteristic value, if the relative error is less than or equal to 12%, obtaining a verified ship lock water delivery mathematical model, otherwise, adjusting parameters of the ship lock water delivery mathematical model until the relative error requirement is met; and simulating by using the verified ship lock water delivery mathematical model to obtain a hydraulic characteristic result of the ship lock water delivery process. The mathematical model is verified and adjusted through the physical model, the hydraulic characteristic result of the ship lock water delivery process is simulated, the obtained result is accurate, and the method can be used for evaluating the double-line ship lock water delivery system and guiding the design of the water delivery system.

Description

Technical Field

[0001] The present invention relates to the technical field of ship lock water delivery system design, and in particular to a simulation analysis method and equipment for hydraulic characteristics of a double-line ship lock water delivery system. Background Art

[0002] The ship lock controls the water level in the lock chamber to rise and fall between the upstream and downstream water levels through the water delivery system buried on both sides or at the bottom of the lock chamber, completing the process of filling or draining the lock chamber. In this process, the ships in the lock chamber rise or fall with the water level, achieving the purpose of overcoming the water level difference. The ship lock water delivery system is divided into a centralized water delivery system or a decentralized water delivery system. The more commonly used is the decentralized water delivery system, which is to disperse the water delivery system at the gate head and the lock chamber. When filling or draining water, the water flows through a series of outlet branches or outlet holes on the longitudinal water delivery corridor at the bottom of the lock chamber or in the lock chamber wall, and the water flows into (out) the lock chamber in a decentralized manner. In some projects, double-line ship locks are used. The double-line ship locks are composed of an upper lock head, a lower lock head, a lock chamber, an upstream pilot channel, a downstream pilot channel and upstream and downstream anchorages. The double-line ship locks are arranged in parallel and share the upstream and downstream pilot channels. According to the conditions of the double-line ship locks, the water supply system adopts a decentralized water supply system. The water outlet corridors at the bottom of the two-line ship locks are connected by two connecting corridors, and valves are set to control the water supply between the two-line ship locks to achieve the purpose of saving water.

[0003] Simulating and analyzing the hydraulic characteristics of the lock water delivery system is one of the important means to ensure the safe, efficient and environmentally friendly operation of the lock. By simulating and analyzing the hydraulic characteristics of the lock water delivery system, parameters such as water velocity, pressure distribution, and flow change can be predicted more accurately, thereby optimizing the design of the lock and ensuring its efficient operation under different working conditions. Simulation analysis can also help identify potential safety hazards, such as scouring and erosion, vortex formation, and other problems that may be caused by local high flow rate areas, which may threaten the safe passage of ships. By discovering these problems in advance and taking measures to solve them, accidents can be effectively avoided.

[0004] Reasonable hydraulic design can reduce hydraulic losses, speed up the passage of ships through the locks, and improve the transportation efficiency of the entire waterway. Therefore, hydraulic characteristic simulation analysis is a key verification method for the design of the lock water delivery system. When double-line locks are arranged in parallel and share upstream and downstream pilot channels, there is currently a lack of hydraulic characteristic simulation analysis methods for double-line lock water delivery systems in the existing technology. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the prior art lacks a simulation analysis method for the hydraulic characteristics of the water delivery system of a double-line ship lock when the double-line ship locks are arranged in parallel and share upstream and downstream pilot channels, and to provide a simulation analysis method and equipment for the hydraulic characteristics of the water delivery system of a double-line ship lock.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A simulation analysis method for hydraulic characteristics of a double-line ship lock water delivery system comprises the following steps:

[0008] According to the Bernoulli equation, a mathematical model of water transfer for ship locks is established;

[0009] The mathematical model of water delivery of ship lock is simulated and solved by difference and iteration method, and the hydraulic characteristic value of water delivery process of ship lock is obtained.

[0010] A physical model of the double-line ship lock water delivery system is established, and the measured hydraulic characteristic values ​​of the ship lock water delivery process are obtained using the physical model of the double-line ship lock water delivery system.

[0011] The measured hydraulic characteristic values ​​of the physical model are compared with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery. If the relative error is less than or equal to 12%, the verified mathematical model of the ship lock water delivery is obtained. Otherwise, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirements are met.

[0012] The verified mathematical model of ship lock water delivery is used for simulation to obtain the hydraulic characteristics of the ship lock water delivery process.

[0013] In the above technical scheme, firstly, based on the double-line ship lock water delivery system and the Bernoulli equation, a mathematical model of the ship lock water delivery during the ship lock water delivery is established, and then the mathematical model is simulated and calculated to obtain the calculated theoretical hydraulic characteristic values; then, the physical model of the double-line ship lock water delivery system is used to simulate the measured hydraulic characteristic values, and the physical model is combined with the mathematical model to compare the theoretical hydraulic characteristic values ​​and the measured hydraulic characteristic value data. The two cooperate with each other to verify and adjust the theory with actual data. When the relative error does not meet the requirement of less than or equal to 12%, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirement of less than or equal to 12% is met, so as to realize the identification and verification of the mathematical model of the ship lock water delivery, and then the simulation results of the verified mathematical model of the ship lock water delivery are used as the hydraulic characteristic results of the ship lock water delivery process. The method of the present invention can be used to simulate the situation that double-line ship locks are arranged in parallel and share upstream and downstream pilot channels. The mathematical model and the physical model are combined, and the physical model is used to verify and adjust the mathematical model to simulate the hydraulic characteristic results of the lock water delivery process. The results are accurate and can be used to evaluate the double-line ship lock water delivery system and guide the design of the water delivery system.

[0014] As a preferred solution of the present invention, the mathematical model of the ship lock water delivery describes the ship lock water delivery as a non-steady flow equation group, and the formula is as follows:

[0015]

[0016]

[0017] Where H 1 ,H,H 2 are the upstream water level, the lock chamber water level and the downstream water level, respectively, in m; ζ, ζ v are the water supply corridor resistance coefficient and valve resistance coefficient respectively; ω is the corridor cross-sectional area at the water supply valve, in m 2 ; Q is the water flow rate of the lock chamber, in m 3 / s; S is the water area of ​​the lock chamber, unit is m 2 ; L is the converted length of the corridor, in meters; subscripts 1 and 2 represent filling and drainage.

[0018] As a preferred solution of the present invention, the hydraulic characteristic values ​​include water delivery time and maximum flow rate.

[0019] As a preferred solution of the present invention, according to the gravity similarity design, the geometric scale L=30 is selected to establish a physical model of the double-line ship lock water delivery system. The physical model of the double-line ship lock water delivery system includes an upstream pilot channel, a ship lock chamber, a water delivery system and a downstream pilot channel. The water delivery system includes a water inlet, an upper lock head, a lock chamber and a lower lock head.

[0020] As a preferred embodiment of the present invention, in the process of simulating the physical model of the double-line ship lock water delivery system or calculating the mathematical model of the ship lock water delivery, the water level change process line and the flow change process line of the lock chamber at different opening times of the filling or discharge valve are determined. The operation modes of the ship lock water delivery system include single-line ship lock operation and double-line mutual water delivery operation. When the single-line ship lock is in operation, the opening and closing time of the main corridor valve of the water delivery system includes 4 minutes, 5 minutes, and 6 minutes; when the double-line mutual water delivery is in operation, the opening time of the water delivery valve at the gate of the water delivery system includes 2 minutes and 3 minutes, and the opening and closing time of the connecting corridor valve includes 1.5 minutes and 2 minutes.

[0021] As a preferred solution of the present invention, when the error requirement is not met, the resistance coefficient of the mathematical model of the ship lock water delivery is adjusted until the relative error requirement is met.

[0022] Another aspect of the present invention provides a simulation and analysis device for hydraulic characteristics of a double-line ship lock water delivery system, the device comprising:

[0023] The digital model module is used to establish the mathematical model of water delivery of the ship lock according to the Bernoulli equation;

[0024] The digital model calculation module is used to simulate and solve the mathematical model of the ship lock water delivery by using the difference and iteration method to obtain the hydraulic characteristic value of the ship lock water delivery process;

[0025] The physical model module is used to establish a physical model of the double-line ship lock water delivery system, and use the physical model of the double-line ship lock water delivery system to obtain the measured hydraulic characteristic values ​​of the ship lock water delivery process;

[0026] A verification module is used to compare the measured hydraulic characteristic values ​​of the physical model with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery. If the relative error is less than or equal to 12%, the verified mathematical model of the ship lock water delivery is obtained. Otherwise, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirement is met.

[0027] The result calculation module is used to simulate the verified mathematical model of ship lock water delivery and obtain the hydraulic characteristic results of the ship lock water delivery process.

[0028] The present invention also provides an electronic device, comprising at least one processor and a memory communicatively connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the above-mentioned simulation analysis method of the hydraulic characteristics of a double-line ship lock water transfer system.

[0029] The present invention also provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the above-mentioned simulation analysis method of the hydraulic characteristics of a double-line ship lock water transfer system.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The invention is based on a double-line ship lock water delivery system and a Bernoulli equation, establishes a ship lock water delivery mathematical model during ship lock water delivery, then simulates and calculates the mathematical model to obtain a calculated theoretical hydraulic characteristic value; then, a physical model of the double-line ship lock water delivery system is used to simulate and obtain a measured hydraulic characteristic value, and a physical model is combined with a mathematical model to compare the theoretical hydraulic characteristic value and the measured hydraulic characteristic value data, and the two cooperate with each other to verify and adjust the theory with actual data, and when a relative error does not meet a requirement of being less than or equal to 12%, the parameters of the ship lock water delivery mathematical model are adjusted until a relative error requirement of being less than or equal to 12% is met, so as to realize identification and verification of the ship lock water delivery mathematical model, and then a simulation result of the verified ship lock water delivery mathematical model is used as a hydraulic characteristic result of the ship lock water delivery process. The method of the present invention can be used to simulate the situation that double-line ship locks are arranged in parallel and share upstream and downstream pilot channels. The mathematical model and the physical model are combined, and the physical model is used to verify and adjust the mathematical model to simulate the hydraulic characteristic results of the lock water delivery process. The results are accurate and can be used to evaluate the double-line ship lock water delivery system and guide the design of the water delivery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1It is a flow chart of the simulation analysis method of the hydraulic characteristics of the double-line ship lock water delivery system of the present invention;

[0033] Figure 2 This is the layout diagram of the water delivery system of the horizontal branch gallery at the bottom of the single-side sluice wall long gallery;

[0034] Figure 3 This is the layout diagram of the connecting corridor of the single-side gate wall long corridor, the gate bottom cross branch corridor and the water delivery system;

[0035] Figure 4 This is the layout diagram of the upstream water inlet of the water conveyance system of the single-side sluice wall long gallery and the lateral branch gallery at the bottom of the sluice;

[0036] Figure 5 This is the layout diagram of the downstream outlet of the water delivery system of the single-side sluice wall long gallery sluice bottom cross-branch gallery;

[0037] Figure 6 This is the plan view of the water delivery system of the side branch holes of the long gallery at the bottom of the gate;

[0038] Figure 7 This is a plan view of the corridor connecting the side branch hole water supply system of the long corridor at the bottom of the gate;

[0039] Figure 8 This is the general layout of the water outlet section of the sluice chamber of the lateral branch hole water delivery system of the sluice bottom long gallery;

[0040] Fig. 9 The irrigation time t v = Comparison of the water level characteristic curves of the model measured and calculated by the numerical model under 6 minutes;

[0041] Fig.10 The irrigation time t v =Comparison of flow characteristic curves between actual model measurement and numerical model calculation under 6min;

[0042] Fig.11 The flow and water level process line of the single-line ship lock when H=10.32m, water filling, and valve opening time of 5min;

[0043] Fig.12 The flow and water level process line of the single-line ship lock when H=10.32m, water discharge, valve opening time 5min;

[0044] Fig.13 H = 10.32m, watering, tv 1 =tv 3 =1.5min, tv 2 = 2min flow and water level process line when two lines are mutually delivering water;

[0045] Fig.14 H = 10.32m, water discharge, tv 1 =tv 3=1.5min, tv 2 = 2min flow and water level process line when two lines are mutually delivering water;

[0046] Fig.15 The flow and water level process line of the single-line ship lock when H=10.32m, water filling, and valve opening time of 5min;

[0047] Fig.16 The flow and water level process line of the single-line ship lock when H=10.32m, water discharge, valve opening time 5min;

[0048] Fig.17 H = 10.32m, watering, tv 1 =tv 3 =1.5min, tv 2 = 2min flow and water level process line when two lines are mutually delivering water;

[0049] Fig.18 H = 10.32m, water discharge, tv 1 =tv 3 =1.5min, tv 2 = 2min flow and water level process line when two lines are mutually delivering water;

[0050] Markings in the figure: 1-upstream pilot channel, 2-lock chamber, 3-water transfer system, 4-downstream pilot channel, 5-connecting corridor. DETAILED DESCRIPTION

[0051] In order to more clearly describe the invention purpose, technical scheme and technical effect advantages in the specific implementation case of the present invention, the scheme in the specific embodiment will be described in detail in combination with the drawings of the specification of the present invention. The specific technical scheme involved in the following specific embodiments is only for a clear and complete description of the innovative technical scheme of the present invention. It is only a part of the specific implementation scheme that can be adopted by the present invention, not all embodiments, and should not be understood as a limitation on the innovative scheme of the present invention. Any scheme adopting the same inventive concept of the present invention should be included in the protection scope of the present invention.

[0052] Secondly, the description of the drawings in the specific embodiments of the present invention is only for the convenience of technical personnel to understand the solution of the present invention. The partial details in the drawings are for the convenience of clearly presenting the technical solution. It should not be considered that all technical features in the drawings must be included in the specific implementation cases, and the detailed features in the drawings should not be identified as additional limitations on the innovative technical solution of the present invention. The components in the various embodiments described and shown in the drawings can be combined and arranged according to different configurations, and these changes in combination and arrangement should be identified as part of the entire embodiment of the innovative solution of the present invention and included in the scope of protection of the present invention.

[0053] In summary, the schemes or descriptions presented in the specific embodiments and drawings of the present invention are not intended to limit the scope of protection claimed, but are merely selected embodiments / cases to help technicians understand the relevant innovative solutions. Based on these embodiments, all other equivalent or parallel embodiments obtained by those skilled in the art without creative work are within the scope of protection claimed by the present invention.

[0054] Example 1

[0055] This embodiment provides a simulation analysis method for the hydraulic characteristics of a double-line ship lock water delivery system. Figure 1 As shown, the following steps are included:

[0056] Step S1, establishing a mathematical model of water delivery for a ship lock according to the Bernoulli equation;

[0057] Step S2, using the difference and iteration method to simulate and solve the mathematical model of the ship lock water delivery, and obtain the hydraulic characteristic value of the ship lock water delivery process;

[0058] A physical model of the double-line ship lock water delivery system is established, and the measured hydraulic characteristic values ​​of the ship lock water delivery process are obtained using the physical model of the double-line ship lock water delivery system.

[0059] Step S3, comparing the measured hydraulic characteristic values ​​of the physical model with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery, if the relative error is less than or equal to 12%, then the verified mathematical model of the ship lock water delivery is obtained, otherwise the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirement is met;

[0060] Step S4: Use the verified mathematical model of ship lock water delivery to perform simulation and obtain the hydraulic characteristic results of the ship lock water delivery process.

[0061] like Figure 2 , Figure 6The upstream navigation channel 1, the lock chamber 2, the water delivery system 3 (including the water inlet, the upper lock head, the lock chamber, the lower lock head) and the downstream navigation channel 4 of the double-line ship lock are shown. In order to perform simulation analysis, this embodiment provides two water delivery systems, namely, the single-side lock wall long corridor lock bottom transverse branch corridor water delivery system and the lock bottom long corridor side branch hole water delivery system. Since the ship lock has high requirements for saving water resources and improving water delivery efficiency, and the ship lock adopts a double-line ship lock arranged in parallel and shares the upstream and downstream navigation channels, the two-line ship lock bottom outlet corridors are connected by two connecting corridors 5, and valves are set to control the water delivery between the two-line ship locks to achieve the purpose of saving water.

[0062] like Figure 2 When the double-line ship lock adopts a single-side lock wall long corridor and lock bottom cross-branch corridor water delivery system, the corridor section size at the water delivery valve is 7.0m×7.5m (width×height), and the valve section area is 52.5m 2 In order to improve the water flow conditions of the double-line ship lock navigation channel and to achieve water-saving function, the two-line ship lock water delivery systems are connected by a connecting corridor. The layout of the connecting corridor is shown in Figure 3 , and valves are set in the connecting corridor to control the water transfer between the two lines of ship locks. The cross-sectional dimensions of the flat valve are 7.5m×7.5m (width×height). The cross-sectional area of ​​the main corridor of the lock wall is 7.0m×7.5m (width×height)=52.5m 2 It is consistent with the cross-sectional area of ​​the corridor at the water transfer valve. The centers of the two outlet sections of the ship lock are arranged at 29.5% and 70.5% of the effective length of the lock chamber respectively. Each outlet section is 72m long and is arranged with 4 cross-branch corridors of the same size. Eight outlet holes of equal area are arranged on both sides of each cross-branch corridor. The cross-sectional area of ​​the cross-branch corridor decreases in 8 levels to keep the outflow of the outlet holes of equal area uniform. In order to adjust the water volume of the upper and lower outlet areas of the lock chamber to be basically the same, the connecting arc radius of the main corridor of the gate wall of the upper lock chamber and the cross-branch corridor of the gate bottom is 2.50m, and the connecting arc radius of the cross-branch corridor of the lower lock chamber is also 2.50m. The inlet cross-sectional area of ​​each cross-branch corridor is taken as 8.96m 2 , so the total area of ​​the cross-branch corridor entrance is 71.68m 2 , which is 1.37 times the cross-sectional area of ​​the corridor at the water transfer valve and 1.37 times the area of ​​the main corridor of the gate wall. In order to ensure uniform lateral water flow, the ratio of the end area of ​​the cross-sectional area of ​​the branch corridor to the inlet area is considered to be about 0.4. In this way, the inlet size of the cross-sectional area of ​​the branch corridor is 3.2m×2.8m (width×height), and the end size is 1.1m×2.8m. The total area of ​​the outlet branch hole is about 1.2 times the total inlet area of ​​the cross-sectional area of ​​the branch corridor. The size of the outlet branch hole of the cross-sectional area is 0.65m×1.0m. Eight holes are arranged on each side of each cross-sectional area, so the total area of ​​the outlet branch hole is 83.2m 2, which is 1.16 times the total area of ​​the inlet of the cross-branch corridor. Similarly, the width B of the energy dissipation ditch at the outlet of the branch hole should meet the distance required for the flow core of the branch hole to shrink to disappear, that is, the width B ≥ 3.25m. The height D of the open ditch sill should be greater than the height of the outflow of the branch hole after diffusion. Take B = 5.0m, then D ≥ 2.2m, take D = 3.3m.

[0063] The upper inlet of the double-line ship lock single-side lock wall long corridor lock bottom transverse branch corridor water delivery system adopts the double transverse branch corridor top grille water inlet layout, the grille top elevation is -6.0m, and the inlet cross-sectional dimensions are 8.0m×8.5m. The lower gate head water outlet adopts the double transverse branch corridor top grille water outlet type, which is similar to the upstream water inlet, the grille top elevation is -11.2m, and the outlet cross-sectional dimensions are 8.0×7.5m. The upstream water inlet and downstream water inlet layout are shown in Figure 4 and Figure 5 The dimensions of the various parts of the water delivery system are summarized in Table 1.

[0064] Table 1 Characteristic dimensions of the water delivery system of the single-side gate wall long corridor and the gate bottom cross-branch corridor

[0065]

[0066]

[0067] like Figure 6 The cross-sectional dimensions of the corridor at the water delivery valve of the side branch hole water delivery system of the double-line ship lock bottom long corridor are 4.5m×6.0m, and the total cross-sectional area of ​​the corridor at the valve section is 54m 2 The cross-sectional area of ​​the main corridor at the bottom of the gate is 67.0m 2 A 1.0m thick partition wall is set in the middle of the main corridor, and about 50% of the area is interconnected to ensure uniform outflow during unilateral water delivery. The water delivery system adopts a side branch hole water discharge and open ditch energy dissipation arrangement with better energy dissipation effect. 64 water outlets are set in the water outlet section of the main corridor at the bottom of the gate, divided into 2 groups. The size of the orifice (width × height) from upstream to downstream is 0.75m × 1.4m (32 holes) and 0.7m × 1.4m (32 holes), with a total area of ​​64.96m 2 , the values ​​of α, β and γ are 1.24, 0.97 and 1.20. The arrangement of the outlet holes in groups and equal spacing is determined according to the specific conditions of the double-line ship lock chamber. The spacing between the outlet holes is 5.6m, and the total length of the outlet hole section is 168m, accounting for 59.80% of the effective length of the lock chamber. Figure 8 shown.

[0068] In order to save water consumption of the ship lock, considering the characteristics of the double-line ship lock layout, the two-line ship lock bottom water outlet corridors are connected through two connecting corridors, and valves are set to control the water transfer between the two-line ship locks. The area of ​​the connecting corridor valve section is 54.0m 2, which is consistent with the corridor of the water delivery valve section. The dimensions of each part of the water delivery system are shown in Table 2, and the layout of the connecting corridor is shown in Figure 7 The water inlet of the upper sluice gallery adopts a vertical multi-branch hole arrangement on the sluice wall. According to the specification requirements, the inlet flow rate of the decentralized water supply system should not be greater than 2.5m / s, so the water inlet (width × height) is taken as 2×6×4.5×6.0m 2 , total area 324.0m 2 . The top elevation of the water inlet is -7.5m, the corresponding bottom elevation is -13.5m, and the minimum flooding depth of the inlet is 15.5m, which is greater than the requirement of 0.4 times the head. The water inlet and the outlet corridor of the gate chamber are connected by a vertical turn, with a height of 6.0m. The working valve is arranged below the vertical turn. The top elevation of the corridor at the valve is -11.2m, and the bottom elevation of the corridor is -17.2m. The minimum flooding depth is 9.58m, which is 0.93 times the head. After the valve, the top of the corridor remains unchanged, and the bottom is raised, reducing the corridor height from 6.0m to 5.0m. The corridor behind the valve is connected to the main corridor at the bottom of the gate through two horizontal turns and slopes, raising the bottom of the corridor to -16.2m, and the corridor height remains unchanged at 5.0m. At the same time, the corridor width is adjusted from 4.5m to 6.7m.

[0069] The corridor of the discharge valve section of the lower gate is connected to the outlet corridor at the bottom of the gate through a slope and a horizontal turn. The slope section reduces the corridor bottom elevation from -16.2m to -17.2m, and the corridor height is raised from 5.0m to 6.0m. The minimum flooding depth of the discharge valve top is 9.58m, and the horizontal turn adjusts the corridor width from 6.7m to 4.5m; after the discharge valve, it is connected to the energy dissipation chamber of the lower gate outlet through another horizontal turn, and the cross-sectional area of ​​the outlet is 132m 2 In order to make the water flow at the outlet as uniform as possible, a middle pier is set at the horizontal turn behind the discharge valve. A water outlet grille is arranged on the top of the energy dissipation chamber at the outlet of the lower gate. The area of ​​the water outlet holes of the grille decreases in 9 levels, with a total area of ​​178.2m 2 .

[0070] Table 2 Characteristic dimensions of the water delivery system of the side branch holes in the long corridor at the bottom of the gate

[0071]

[0072]

[0073] According to the Bernoulli equation, the mathematical model of the ship lock water delivery is obtained to describe the unsteady flow equations during the ship lock water delivery, namely:

[0074]

[0075] In the above formula, H 1 ,H,H 2 are the upstream water level, the lock chamber water level and the downstream water level, respectively, in m; ζ, ζv are the water supply corridor resistance coefficient and valve resistance coefficient respectively; ω is the corridor cross-sectional area at the water supply valve, in m 2 ; Q is the water flow rate of the lock chamber, in m 3 / s; S is the water area of ​​the lock chamber, unit is m 2 ; L is the converted length of the corridor, in meters; subscripts 1 and 2 represent filling and drainage.

[0076] By solving the above equations using the difference and iteration method, we can obtain the hydraulic characteristic values ​​of the lock water delivery process, such as the flow process line, water level process line, etc., and obtain the water delivery time and maximum flow rate.

[0077] In order to verify the mathematical model of water delivery of the ship lock, the hydraulic characteristic curves of filling and discharging measured by the 1:30 overall physical model of the double-line ship lock were used to verify the mathematical model. The comparison results are shown in Table 3.

[0078] Table 3 Comparison between mathematical model calculated values ​​and model measured values

[0079]

[0080] From the above data, it can be seen that the maximum relative errors between the water delivery time and maximum water delivery flow calculated by the mathematical model and the actual measurement by the model are 10.43% and -6.82%. Fig. 9 and Fig.10 It can be seen that the lock chamber water level change curve calculated by the mathematical model is in good agreement, and the flow change curve is only slightly biased before the maximum flow occurs. The main reason for this is that the resistance coefficient in the mathematical model is estimated based on the empirical formula, which is slightly different from the actual resistance coefficient of the physical model. The resistance coefficient of the mathematical model of the ship lock water delivery is adjusted until the relative error requirements are met.

[0081] (1) Calculation of hydraulic characteristics of the water supply system of the single-side gate wall long corridor and the horizontal branch corridor at the bottom of the gate

[0082] The basic hydraulic parameters of the decentralized water delivery system are: the resistance coefficient and flow coefficient of the water delivery system after the valve is fully opened, the converted length of the water delivery system, and the superelevation and superdrop of the gate chamber. The results are shown in Tables 4 to 6.

[0083] Table 4 Irrigation resistance coefficient and flow coefficient

[0084]

[0085] Table 5 Discharge resistance coefficient and flow coefficient

[0086]

[0087]

[0088] Table 6 Mutual injection and mutual discharge resistance coefficient and flow coefficient

[0089]

[0090] The corridors on each side of the mutual filling and discharge water supply system are parallel systems. The converted length of the corridor of the water supply system can be roughly divided into three cross-sectional sections for calculation according to the different cross-sectional areas when filling. The converted length of the corridor of the water supply system when filling is 207m. According to the same method, the converted length of the corridor when discharging is 190m, and the converted length of the corridor when filling and discharge is 340m.

[0091] According to the characteristic water levels upstream and downstream of the double-line ship lock, combined with comprehensive engineering analysis, the design head is determined to be 10.32m (normal water level 8.7m ~ downstream minimum navigable head -1.62m); 2. Minimum navigable head 9.62m (upstream minimum navigable head 8.0m ~ downstream minimum navigable head -1.62m); 3. Frequent head 8.04m (normal water level 8.7m ~ downstream average tidal level 0.66m). For the filling or discharge of the lock chamber, when the single-line ship lock is in operation, the opening and closing time of the main corridor valve of the water transfer system is divided into three cases: 4min, 5min, and 6min; when the double-line water transfer is in operation, the opening time of the water transfer valve at the head of the water transfer system is divided into two cases: 2min and 3min, and the opening and closing time of the connecting corridor valve is divided into two cases: 1.5min and 2min.

[0092] The above method is used to perform one-dimensional hydraulic calculation on the water delivery system of the single-side lock wall long corridor and the bottom cross-branch corridor. The water delivery time is shown in Table 7 and Table 8, and the maximum water delivery flow is shown in Table 9 and Table 10. The flow and water level process lines of water filling or water discharge during single-line operation of the ship lock are shown in Fig.11 , 12 When the two lines of the ship lock are in operation, the flow rate of filling or discharging water and the water level process line are as follows: Fig.13 , 14 When the single-line lock of the double-line ship lock is in operation, the water transfer time shall not exceed 10 minutes; when the double-line ship lock is in operation of mutual water transfer, the water transfer time shall not exceed 12 minutes.

[0093] Table 7 Single-line water delivery time

[0094]

[0095]

[0096] Table 8 Water transfer time of two lines with mutual filling and discharge

[0097]

[0098] Table 9 Maximum water flow rate for single-line operation

[0099]

[0100] Table 10 Maximum water flow of two-line mutual injection and discharge

[0101]

[0102] (2) Calculation of hydraulic characteristics of the side branch hole water supply system of the long corridor at the bottom of the gate

[0103] The basic hydraulic parameters of the decentralized water supply system are: the resistance coefficient and flow coefficient of the water supply system after the valve is fully opened, the converted length of the water supply system, and the superelevation and superdrain of the gate chamber. The results are shown in Tables 11 to 13.

[0104] Table 11 Water filling resistance coefficient and flow coefficient of the side branch hole water supply system of the long corridor at the bottom of the gate

[0105]

[0106] Table 12 Discharge resistance coefficient and flow coefficient of the side branch hole water supply system of the long corridor at the bottom of the gate

[0107]

[0108] Table 13 Resistance coefficient and flow coefficient of mutual injection and mutual discharge of the side branch hole water supply system of the long corridor at the bottom of the gate

[0109]

[0110] The corridors on each side of the mutual injection and discharge water supply system are parallel systems. The converted length of the corridor of the water supply system during injection can be divided into three cross-sectional sections for calculation according to the different cross-sectional areas. That is, the converted length of the corridor of the water supply system during injection is 197m. According to the same method, the converted length of the corridor during discharge is 177m, and the converted length of the corridor during mutual injection and discharge is 340m.

[0111] According to the characteristic water levels upstream and downstream of the double-line ship lock, combined with comprehensive engineering analysis, the design head is determined to be 10.32m (normal water level 8.7m ~ downstream minimum navigable head -1.62m); 2. Minimum navigable head 9.62m (upstream minimum navigable head 8.0m ~ downstream minimum navigable head -1.62m); 3. Frequent head 8.04m (normal water level 8.7m ~ downstream average tidal level 0.66m). For the filling or discharge of the lock chamber, when the single-line ship lock is in operation, the opening and closing time of the main corridor valve of the water transfer system is divided into three cases: 4min, 5min, and 6min; when the double-line water transfer is in operation, the opening time of the water transfer valve at the head of the water transfer system is divided into two cases: 2min and 3min, and the opening and closing time of the connecting corridor valve is divided into two cases: 1.5min and 2min.

[0112] The above method is used to perform one-dimensional hydraulic calculation on the side branch hole water delivery system of the long gallery at the bottom of the lock. The water delivery time is shown in Table 14 and Table 15, and the maximum water delivery flow is shown in Table 16 and Table 17. The flow and water level process lines of water filling or water discharge during single-line operation of the ship lock are shown in Fig.15 , 16 When the two lines of the ship lock are in operation, the flow rate of filling or discharging water and the water level process line are as follows: Fig.17 , 18 When the single-line lock of the double-line ship lock is in operation, the water transfer time shall not exceed 10 minutes; when the double-line ship lock is in operation of mutual water transfer, the water transfer time shall not exceed 12 minutes.

[0113] Table 14 Single-line operation water delivery time of the side branch hole water delivery system of the long corridor at the bottom of the gate

[0114]

[0115] Table 15 Water delivery time of the side branch hole water delivery system of the long corridor at the bottom of the gate

[0116]

[0117] Table 16 Maximum water flow rate of the side branch hole water supply system in the long corridor at the bottom of the gate in single line operation

[0118]

[0119] Table 17 Maximum water flow of the water supply system with mutual injection and discharge of the side branch holes in the long corridor at the bottom of the gate

[0120]

[0121] Note: A / B represent the maximum flow rates of the first and second stages of the water delivery process respectively.

[0122] The calculation results of the above two water conveyance systems are compared and analyzed. The filling and discharge time of the water conveyance system of the single-side gate wall long corridor and the bottom cross-branch corridor is longer than that of the water conveyance system of the bottom long corridor and the side branch hole (both schemes meet the water conveyance time requirements); the ratio of the total cross-sectional area of ​​the outlet branch holes to the cross-sectional area of ​​the main corridor of the single-side gate wall long corridor and the bottom cross-branch corridor water conveyance system is larger (β=1.58), so the water discharge in the outlet section is not as uniform as that of the bottom long corridor scheme. In summary, the hydraulic characteristics of the two water conveyance systems are basically the same, and all hydraulic indicators can meet the design and specification requirements. Therefore, from the perspective of hydraulics, both water conveyance systems are feasible. Combined with the specific considerations of structure, layout and project investment, the bottom long corridor and the side branch hole water conveyance system is selected as the water conveyance system of the double-line ship lock.

[0123] Example 2

[0124] This embodiment provides a simulation analysis device for hydraulic characteristics of a double-line ship lock water delivery system, the device comprising:

[0125] The digital model module is used to establish the mathematical model of water delivery of the ship lock according to the Bernoulli equation;

[0126] The digital model calculation module is used to simulate and solve the mathematical model of the ship lock water delivery by using the difference and iteration method to obtain the hydraulic characteristic value of the ship lock water delivery process;

[0127] The physical model module is used to establish a physical model of the double-line ship lock water delivery system, and use the physical model of the double-line ship lock water delivery system to obtain the measured hydraulic characteristic values ​​of the ship lock water delivery process;

[0128] A verification module is used to compare the measured hydraulic characteristic values ​​of the physical model with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery. If the relative error is less than or equal to 12%, the verified mathematical model of the ship lock water delivery is obtained. Otherwise, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirement is met.

[0129] The result calculation module is used to simulate the verified mathematical model of ship lock water delivery and obtain the hydraulic characteristic results of the ship lock water delivery process.

[0130] The systems or modules described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing this application, the functions of each module can be implemented in the same or multiple software and / or hardware, or the module that implements the same function can be implemented by a combination of multiple sub-modules.

[0131] This embodiment also provides an electronic device, including at least one processor, a memory connected to the at least one processor, and at least one input / output interface connected to the at least one processor; the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the simulation analysis method of the hydraulic characteristics of the double-line ship lock water delivery system of the aforementioned embodiment 1. The input / output interface may include a display, a keyboard, a mouse, and a USB interface for inputting and outputting data.

[0132] The electronic device can be an electronic device for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute a simulation analysis method of hydraulic characteristics of a double-line ship lock water delivery system in Example 1.

[0133] Those skilled in the art can understand that: all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), disks or optical disks, etc. Various media that can store program codes.

[0134] When the above-mentioned integrated unit of the present invention is implemented in the form of a software functional unit and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0135] This embodiment also provides a computer-readable storage medium, in which at least one instruction, at least one program, code set or instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the above-mentioned simulation analysis method of the hydraulic characteristics of a double-line ship lock water transfer system.

[0136] Computer readable storage media can be tangible devices that hold and store instructions used by instruction execution devices. Computer readable storage media can be, for example, but not limited to, electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any combination thereof.

[0137] For those skilled in the art, when understanding the solutions described in the specific embodiments of the present invention, they can refer to the conventional technical manuals in the field. At the same time, for the places where the above-mentioned terms appear, they can make appropriate understandings or adjustments for reference, and deduce the implementation of the same or similar technical solutions without paying any creative work.

[0138] The above embodiments describe only the basic principles, main features and / or advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the invention content of the specification only describe the principles or specific cases of the present invention. Without departing from the essence of the innovative idea of ​​the present invention, the innovative scheme of the present invention may be subject to various changes and improvements, and these changes and improvements all fall within the scope of protection required by the present invention.

Claims

1. A simulation analysis method for hydraulic characteristics of a double-line ship lock water delivery system, comprising the following steps: According to the Bernoulli equation, a mathematical model of water transfer for ship locks is established; The mathematical model of water delivery of ship lock is simulated and solved by difference and iteration method, and the hydraulic characteristic value of water delivery process of ship lock is obtained. A physical model of the double-line ship lock water delivery system is established, and the measured hydraulic characteristic values ​​of the ship lock water delivery process are obtained using the physical model of the double-line ship lock water delivery system. The measured hydraulic characteristic values ​​of the physical model are compared with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery. If the relative error is less than or equal to 12%, the verified mathematical model of the ship lock water delivery is obtained. Otherwise, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirements are met. The verified mathematical model of ship lock water delivery is used for simulation to obtain the hydraulic characteristics of the ship lock water delivery process.

2. The simulation analysis method of hydraulic characteristics of a double-line ship lock water delivery system according to claim 1 is characterized in that: The mathematical model of ship lock water delivery describes the ship lock water delivery as a set of unsteady flow equations, and the formula is as follows: Where H1, H2 are the upstream water level, the lock chamber water level and the downstream water level respectively; ζ, ζ v are the resistance coefficient of the water conveyance corridor and the valve resistance coefficient respectively; ω is the cross-sectional area of ​​the corridor at the water conveyance valve; Q is the water flow rate of the lock chamber; S is the water area of ​​the lock chamber; L is the converted length of the corridor; subscripts 1 and 2 represent filling and discharge.

3. The simulation analysis method of hydraulic characteristics of a double-line ship lock water delivery system according to claim 1 is characterized in that: Hydraulic characteristic values ​​include water delivery time and maximum flow rate.

4. The simulation analysis method of hydraulic characteristics of a double-line ship lock water delivery system according to claim 1 is characterized in that: According to the gravity similarity design, the geometric scale L=30 is selected to establish the physical model of the double-line ship lock water delivery system. The physical model of the double-line ship lock water delivery system includes the upstream pilot channel, the ship lock chamber, the water delivery system and the downstream pilot channel. The water delivery system includes the water inlet, the upper lock head, the lock chamber and the lower lock head.

5. The simulation analysis method for hydraulic characteristics of a double-line ship lock water delivery system according to claim 4 is characterized in that: In the process of simulating the physical model of the double-line ship lock water supply system or calculating the mathematical model of the ship lock water supply, the water level change process line and flow change process line of the lock chamber at different opening times of the filling or discharge valve are determined. The operation modes of the ship lock water supply system include single-line ship lock operation and double-line mutual water supply operation.

6. The simulation analysis method for hydraulic characteristics of a double-line ship lock water delivery system according to claim 5 is characterized in that: When the single-line ship lock is in operation, the opening and closing time of the main corridor valve of the water supply system includes 4 minutes, 5 minutes, and 6 minutes; when the double-line water supply is in operation, the opening time of the water supply valve at the head of the water supply system includes 2 minutes and 3 minutes, and the opening and closing time of the connecting corridor valve includes 1.5 minutes and 2 minutes.

7. The simulation analysis method for hydraulic characteristics of a double-line ship lock water delivery system according to any one of claims 1 to 6, characterized in that: When the error requirement is not met, the resistance coefficient of the mathematical model of the ship lock water delivery is adjusted until the relative error requirement is met.

8. A simulation and analysis device for the hydraulic characteristics of a double-line ship lock water delivery system, characterized in that: The device comprises: The digital model module is used to establish the mathematical model of water delivery of the ship lock according to the Bernoulli equation; The numerical simulation module is used to simulate and solve the mathematical model of the ship lock water delivery by using the difference and iteration method to obtain the hydraulic characteristic value of the ship lock water delivery process; The physical model module is used to establish a physical model of the double-line ship lock water delivery system, and use the physical model of the double-line ship lock water delivery system to obtain the measured hydraulic characteristic values ​​of the ship lock water delivery process; A verification module is used to compare the measured hydraulic characteristic values ​​of the physical model with the hydraulic characteristic values ​​of the mathematical model of the ship lock water delivery. If the relative error is less than or equal to 12%, the verified mathematical model of the ship lock water delivery is obtained. Otherwise, the parameters of the mathematical model of the ship lock water delivery are adjusted until the relative error requirement is met. The result calculation module is used to simulate the verified mathematical model of ship lock water delivery and obtain the hydraulic characteristic results of the ship lock water delivery process.

9. An electronic device comprising at least one processor and a memory in communication with the at least one processor; the memory stores instructions executed by the at least one processor, characterized in that: The instructions are executed by the at least one processor so that the at least one processor can execute the simulation analysis method of the hydraulic characteristics of the double-line ship lock water delivery system as described in any one of claims 1-7.

10. A computer-readable storage medium, wherein at least one instruction, at least one program, a code set or an instruction set is stored in the computer-readable storage medium, wherein the at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the simulation analysis method of the hydraulic characteristics of the double-line ship lock water delivery system as described in any one of claims 1 to 7.

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