108 results about "Hydraulic simulation" patented technology

The invention relates to a processing method and a processing device for providing auxiliary dispatching data of a water supply network. The processing device is characterized by comprising a supervisory control and data acquisition (SCADA) system, a water supply network hydraulic simulation model processor, a water supply network water quantity prediction model processor, a supplementary measurement pressure data recorder, and an auxiliary dispatching decision processor, wherein the auxiliary dispatching decision processor is connected with the SCADA system, the water supply network hydraulic simulation model processor, the water supply network water prediction model processor, and the supplementary measurement pressure data recorder respectively. Compared with the prior art, the processing method and the processing device have the advantages of providing an effective path for safe and reliable dispatching, energy-saving and optimized dispatching, intellectualized and informationalized scientific dispatching of the urban water supply network, and the like.

The invention discloses a clustering and deep belief network-based leakage initial locating method. The method comprises the steps of firstly performing calculation to obtain a pipe network monitoringpoint sensitivity coefficient matrix; secondly dividing a pipe network into multiple leakage regions based on K-means clustering, and generating a leakage sample by utilizing hydraulic simulation software; thirdly building and training a deep belief network-based leakage region identification model; and finally identifying the leakage regions according to actually measured pressure data. The method solves the problem of leakage sample scarcity during modeling, realizes quick locating of the leakage regions in an initial leakage stage, and has relatively high identification precision and relatively strong operability.

The invention relates to a heating supply system hydraulic equilibrium model prediction control method and system. The model prediction control method comprises the following steps that S1, a heating supply system hydraulics simulation model is built; S2, flow distribution schemes of all heating stations are calculated; S3, through the heating supply system hydraulics simulation model, in-station pressure drop of all heating stations corresponding to the flow distribution schemes is calculated; S4, through all heating station running historical data, the congruent relationship between the adjustable valve opening degree or water pump frequency and the heating station hydraulic characteristic is built; and S5, according to target flow and in-station pressure drop conditions of all heating stations, the adjustable valve opening degree or adjustable booster pump frequency in all heating stations are calculated, and control operation is accordingly executed.

The invention relates to a heating pipe network hydraulic simulation model identification correction method and a system. The heating pipe network hydraulic simulation model identification correction method comprises the steps of S1, selecting multiple groups of actually measured data of a heating system under steady work conditions, S2, calculating theoretical values of the drag coefficient of all pipe section, and S3, establishing a hydraulic simulation model of heating pipe network, using particle swarm optimization method accompanied by multiple groups of actually measured data, identifying and calculating various resistance coefficient correction amount vectors, and through the various resistance coefficient correction amount vectors in the heating pipe network hydraulic simulation model, making the comparison between the flow conditions and the actual measured data under multiple working conditions, identifying the optimal resistance coefficient correction amount. The corrected model can better describe the actual physical system, and increase the calculation precision of the hydraulic calculation of heating pipe network. The application of a parallel computing architecture for the implementation for the identification of the particle swarm algorithm drag coefficient correction with high identification efficiency.

The invention relates to the field of advanced control of urban intensive heat supply systems, in particular to a method and a system for controlling variable-flow hydraulic equilibrium of a secondarypipe network by physically fusing information. The method for controlling hydraulic equilibrium comprises the following steps: step S100 of acquiring pipe network data, which corresponds to the heatsupply secondary pipeline network, of each user, and representative room temperature data; step S200 of establishing a hydraulic simulation model of the heat supply secondary pipe network to obtain characteristics of a hydraulic equilibrium relationship of the secondary pipe network on line; step S300 of determining flow needed for each user under a working condition based on the pipe network dataand the room-temperature data; step S400 of calculating unit resistance characteristics which correspond to flow needed by each user through the hydraulic simulation model; and step S500 of determining a control strategy of each user valve which corresponds to the unit resistance characteristics. The method realizes simulation analysis and calculation for a needed working condition, and predicates the control strategy of hydraulic equilibrium under the needed working condition.

The invention discloses a valve closing optimal control method of a transition process of a long distance and mass flow water conveyance system, and relates to the field of pressure pipeline hydraulics simulations. The method comprises the steps that a long distance and mass flow water conveyance engineering hydraulic transition process simulation model is established; on the basis of the pumping station water hammer two stage valve closing, a trial algorithm is adopted to seek feasible region intervals on a first segment valve closing from the closing times and angular variations; according to the obtained feasible region interval, an optimization interval search method is adopted in the feasible region interval to conduct the step-by-step search, an optimal feasible region floating within the design range is obtained, the calculation is terminated, and the optimization control on the valve closing of the transition process of the long distance and mass flow water conveyance system is completed. According to the valve closing optimal control method, the optimal feasible region of the valve closing is achieved, both the pump station unit and the safe operations of the pipeline are satisfied, meanwhile the occurrence of the cutoff and the bridge water hammer is reduced or prevented.

The invention relates to a daily optimization regulation control method for water conveying systems of step pump stations. The method comprises the steps of establishing a hydraulic simulation model and calculating water head loss; performing optimization distribution on flow of a unit in each pump station; performing optimization distribution on lift of each pump station in the step pump stations; and performing optimization distribution on water diversion volume at each time period in a day. According to the method, the optimization regulation control problem of the water conveying systems of the multi-constraint and multi-target step pump stations is taken as a research object, storage ponds, channels and the step pump stations are comprehensively considered, the hydraulic simulation model and a large system decomposition-coordination method are synthesized, and a daily optimization regulation control mode for a water diversion project is established, so that scientific bases and technical support can be provided for actual regulation control. Compared with the prior art, the method has the characteristics that the constraints such as the storage constraints of the storage ponds, the water head loss of the channels, the total lift of the step pump stations and the like are provided, so that the constraint conditions of project regulation control can better meet the requirements of the water conveying systems in the water diversion project; and the economic benefits of the water conveying systems are maximized by taking the minimum sum of abandoned water and the total electricity fee of the step pump stations as a target function.

The invention discloses a long-distance water pipe simulator, comprising a water incoming tank, a water outgoing tank, an inner pipe and an outer pipe. The inner pipe and the outer pipe which are cylindrical are horizontally disposed. The inner pipe is nested in the outer pipe. A left cover and a right cover are disposed on two sides of the outer pipe. The upper end of the outer pipe is provided with a water inlet; a water incoming electromagnetic valve is disposed at a connection of the water inlet and a water pipe. The lower end of the water pipe is provided with a water outlet; a water outgoing electromagnetic valve is disposed at a connection of the water outlet and the water pipe. A pitot tube is disposed at the top of the outer pipe. By using normal hydraulic simulation, simulation hydraulic conditions are more practical; the inner pipe is made of nodular cast iron consistent with an actual water pipe, wall conditions of the actual water pipe are simulated, and a bio-membrane similar to the inner wall of the actual water pipe is easy to cultivate; water flow speed is controlled by adjusting a motor, the water flow speed is measured at any time through the pitot tube, a timer is set to control hydraulic retention time, and original water delivery and distribution in different water pipes is simulated; the covers on the outer pipe are removable, thus taking the bio-membranes attached to the inner walls of the inner and outer pipes is facilitated.

The present invention belongs to the technical field of municipal engineering water supply pipe network information. In order to overcome the deficiencies of the prior art, the present invention aimsto propose a water supply pipe network model construction method, which has a simple structure, good performance, and a low cost. The technical scheme of the present invention is a water supply pipe network management and hydraulic model construction method by using an open source GIS and a database. The method comprises the following steps: (1) for a pipe section, a node, and a reservoir layer that are necessary for a water supply pipe network, rationally designing attribute fields thereof; (2) using open source QGIS (Quantum GIS) desktop software to manage data and maps of the water supply pipe network, and to implement data entry and editing functions and query and statistics functions; (3) using open-source PostGIS geodatabases to store water pipe network data; (4) inputting the conversion of files to the EPANET; and (5) carrying out hydraulic simulation and calculation. The method provided by the present invention can be mainly applied to information processing occasions of a municipal engineering water supply pipe network.

The invention relates to a fire-fighting robot arm double-coupling simulation method, which is characterized by comprising the steps of hydraulic loop design, a Pro / e rigid body modeling, an ANSYS flexible body modeling, a kinematics and dynamics simulation, a machine and hydraulic coupling simulation, rigid and flexible coupling simulation and double-coupling analysis, wherein the rigid and flexible coupling simulation is that an ANSYS flexible body model of a large arm and an ANSYS flexible body model of a small arm respectively replace rigid body models of the large arm and the small arm in a rigid body assembling body, thereby obtaining the rigid and flexible coupling model to carry out the rigid and flexible coupling simulation; and the double-coupling analysis is that the combined simulation of the machine and hydraulic simulation and the rigid and flexible simulation. The method is mainly used for the dynamic simulation and experiment of the fire-fighting robot arm, is convenient for integrally mastering the change rules of stress, strain and hydraulic pressure system parameters, saves the simulation time, improves the simulation efficiency, and shortens the design cycle ofthe robot arm.

The invention discloses a lifting device for hydraulics simulation, which comprises a pillar, a lifting device and a switch device, wherein the pillar is used for supporting the lifting device; the lifting device is used for quickly lifting a gate through an elastic pull; and the switch device is used for controlling the lifting device to be stopped at a first stopping position and releasing the lifting device to enable the lifting device to lift the gate, and the first stopping position is corresponding to the elastic tensioning state of the lifting device and the closing state of the gate. Through an elastic device and pulleys, lifting power is provided for the gate, the initial gate lifting acceleration is large, the late acceleration is reduced gradually, time consumption for gate lifting is shortened, and operation safety is ensured.

The invention discloses an optimum layout method aiming at pressure monitoring points of a water supply pipe network. The method comprises the steps of building a leakage probability model; acquiringthe leakage probability of each node by calculation according to the leakage probability model, and performing pipe network leakage simulation on water demand nodes of which the leakage probability isgreater than a preset value by employing pipe network adjustment software EPANET to obtain pressure data Hi of each node of the pipe network within 24 h under the condition of leakage; performing hydraulic simulation calculation under the normal condition on the pipe network data by employing the pipe network adjustment software EPANET to obtain pressure data Hi' of each node of the pipe networkwithin 24 h; calculating a pressure-sensitivity matrix, and performing standard deviation standardization and extreme value standardization on the matrix in sequence to obtain the sensitivity of eachnode to leakage; and performing a non-dominated sorting genetic algorithm-II (NSGAII) dual-objective iterative optimization, and performing iteration by taking the threshold range of the sensitivity as the standard of monitoring point covering leakage events and taking the number of minimized monitoring points and the number of minimized uncovering leakage events as objectives to obtain a set of Pareto optimum solutions, i.e., optimum distribution corresponding to number of different monitoring points.

The invention discloses a water supply network pollution source positioning method based on a multi-population co-evolutionary algorithm. The method comprises the following steps: acquiring pollutant concentration detected by each water quality sensor in a water supply network; using the multi-population co-evolutionary algorithm for generating several initial contamination accident at random; simulating the pollutant concentration, performing hydraulic simulation and water quality simulation based on the contamination accident to obtain a pollutant concentration simulation result; matching the pollutant concentration and the pollutant concentration simulation result to obtain a matching error; when the matching error is greater than a set error, using the multi-population co-evolutionary algorithm to adjust and optimize the direction according to the matching error for a cyclic search until a globally optimal solution is found; and determining and finding the pollution source position when the matching error is in a set error range. According to the water supply network pollution source positioning method, the pollution source can be rapidly and accurately positioned, pollution information can be accurately provided, and technical problem that in prior art, it is difficult to rapidly and accurately position the pollution source in a large scale water supply network can be solved.

The present invention relates to a stochastic simulation method for evaluating the reliability of an urban water supply network, and belongs to the technical field of seismic protection of the urban water supply network. The method comprises the following steps: calculating the pipeline seismic damage rate; generating the seismic damage scenario of the water supply network based on the Monte Carlosimulation; carrying out hydraulic analysis on the low-pressure water supply network based on the "step-by-step iteration" method; and calculating the seismic reliability index. According to the method provided by the present invention, without modifying a pipe network system file or writing an extra code, the hydraulic equations of the low-pressure pipe network can be solved, and the method hasthe advantages of high computational efficiency and good stability; and the method provides a new idea for hydraulic simulation and reliability evaluation of the water supply network during earthquake, and is of guiding significance to disaster relief and restoration after an earthquake.

The invention relates to a control method and system for hydraulic disorders of a cold / heat supply pipe network. The method comprises the steps that a hydraulic simulation model of a cold / heat supplypipe network system is set up; the flow distribution scheme of users is confirmed; according to the flow distribution scheme of the users, the hydraulic conditions of the users are calculated throughthe running historical data of the users; according to the hydraulic conditions of the users, primary hydraulic adjustment is carried out on the pipe network through the model analysis method; according to the historical temperature records of the old / heat supply pipe network system, the artificial neural network is adopted for predicating outdoor temperature; according to the outdoor predicated temperature, models are set up for different running adjusting manners to be compared and calculated; according to the calculation result, the corresponding running adjusting manners are selected, andthe pipe network system obtained after primary hydraulic adjustment is adjusted secondarily; and hydraulic condition inspection is carried out on the pipe network system obtained after secondary adjustment. According to the method, on the premise of achieving hydraulic balance of the cold / heat supply pipe network, hydraulic balance adjustment can be completed within a short time after the cold / heat supply system is put into operation.

The invention relates to an operating and scheduling control method for a cascade pump station water delivery system. The method includes the steps of establishing a hydraulic simulation model, establishing a water level-flow-storage volume relation of channel segments, judging the working condition in real time, conducting control on the before-station water level and after-station water level of each pump station within the extreme value range, conducting control on the condition that the water level exceeds the maximum operating water level, and conducting control on the condition that the water level exceeds the minimum operating water level. According to the method, in the cascade pump station water delivery system, the hydraulic simulation model is established, the water level-flow-storage volume relation of the channel segments is calculated, and the control scheme is established according to the control method under the real-time working condition, wherein if the before-station water level and after-station water level of each pump station are within the extreme value range, the time variation rule of the before-station water level or after-station water level of each pump station is predicted to provide the control scheme, and if the before-station water level and after-station water level of one pump station exceed the extreme value range, the control measure is taken immediately. The control scheme is proposed to provide technical support for manual scheduling and guarantee safe operating of the cascade pump station water delivery system.

The invention discloses a water diversion project operation mode converting method. The water diversion project operation mode converting method comprises the four basic steps that a hydraulics simulation model under regulation of a brake pump group is established; it is judged that what kind of water diversion project operation mode is selected; whether the converting conditions are achieved or not is judged; and the operation mode is converted. The water diversion project operation mode converting method is a dispatching control method applied to convert the operation mode of a water diversion project under the emergency working condition and used for solving the problems that during emergency regulation of the water diversion project, water flow response and recovery characteristics arepoor, and storage volume regulation and emergency demands are inconsistent.

The invention discloses a water supply pipe network sensor arrangement optimization method based on a multiple particle swarm optimization algorithm. The method includes: a pipe network topology structure of a water supply pipe network is established, the complexity of each pipe network node in the water supply pipe network is obtained, hydraulic simulation and water quality simulation of the pipe network topology structure are performed, and the accessibility and the pollutant concentration of each pipe network node are obtained; population initialization of the multiple particle swarm optimization algorithm is performed at a main calculating node, and global search is conducted in the MAP stage; local search is conducted in the Reduce stage, and the newest global optimal individual is obtained; whether the fitness of the newest global optimal individual satisfies a preset convergence condition is determined, and if the fitness does not satisfy the preset convergence condition, iteration evolution is continued via moving to the task distribution step. According to the method, the technical problem of long optimization time of water supply pipe network sensor arrangement in the prior art is effectively solved, the monitoring effect is maximized (such as detecting pollution events with the fastest time), and safety risks due to pollution of drinking water are prevented.

The invention discloses a riverway online monitoring system. The system comprises water quality parameter configuration, monitoring site construction and platform construction, water quality parameters, black-odor indexes, comprehensive environmental indexes and an automatically or remotely controlled nearby purifying water body are set in water quality parameter configuration, stationary monitoring points and moving monitoring points are set in monitoring site construction, and software platform features and a software platform architecture are set in platform construction; by means of platform construction, a modern database technology, a network communication technology and a middleware technology are combined, a layered and modularized software design concept is adopted, the functionsof automatic monitoring site real-time monitoring, data storing, query analysis and the like are integrated into a whole, by taking centralized network management and network transmission as a core, the whole process of real-time data collecting, transmission, monitoring, management and storing is completed, and an effective data foundation is provided for an online water quality monitoring platform, a hydraulic simulation modeling platform, a scheduling operation platform and the like.

A method and system for performing a criticality analysis of a water distribution network is provided. The method and system provides for segmentation of the system which allows a user to determine the set of elements that comprise segments, which in turn are the smallest portion of a water distribution system that can be isolated by valving. Isolating valves are included as elements in the set of elements that are used by an associated hydraulic solver engine to segment the water distribution network. Once the network has been segmented, a criticality analysis is performed whereby a hydraulic simulation is run for an outage of one or more segments, and the shortfall in demand supplied to other segments is calculated. The system provides for a linking of the ability to automatically identify segments with a hydraulic analysis model to enable a user not only to identify segments, but to rank their importance based on a variety of user defined metrics.

The invention discloses a thermotechnical hydraulic simulation software dynamic generation method, device and equipment and a medium, and the method comprises the following steps: dividing thermotechnical hydraulic special simulation software into a thermotechnical hydraulic mathematical model and a visual simulation interface at the level of a simulation system, and respectively defining the mathematical model and the simulation interface; and decoupling the development process of the thermal hydraulic simulation software, and dynamically generating the special thermal hydraulic simulation software by introducing a user-defined connection relationship. By the adoption of the method and device, thermal hydraulic digital model development and thermal hydraulic simulation interface development are decoupled, independent development of the thermal hydraulic digital model development and the thermal hydraulic simulation interface development is achieved, and development efficiency can be improved; and meanwhile, the connection relationship is customized by the user, so that the customization process is simplified, and the customization efficiency can be improved.

The invention provides a hydraulic model-based optimum design method for urban underpass drainage systems, and belongs to the technical field of municipal engineering technologies and geographic information system technologies. The hydraulic model-based optimum design method for urban underpass drainage systems comprises the following steps of: 1, constructing a digital elevation model (DEM); 2, constructing a hydraulic model, and carrying out two-dimensional hydraulic simulation under different working conditions; 3, carrying out drainage outlet safety evaluation and pumping station working condition check; and 4, carrying out optimum design on an underpass drainage system. According to the method, high-area DEMs and low-area DEMs are accurate, and the correctness of two-dimensional overland flow simulation is improved, so that urban underpass drainage systems are optimized, the design of the drainage systems is guided, urban inland inundation disasters of underpass nodes are decreased, and the normal operation of urban traffic and safety of human life and properties are ensured.

The invention discloses a gravity casting simulation test stand. The test stand comprises a base, a casting ladle frame, a test casting ladle, a dumping device, a vibrating table, a simulating sand box and a measuring device. By selecting water or slurry or glycerin or the like as a medium to simulate liquid metal, the gravity casting simulation test stand is mainly used for hydraulic simulation tests in the filling process, casting rule simulation tests and vibration casting simulation tests in the casting molding process. The test casting ladle is driven by the dumping device to achieve gravity casting, and different casting systems and moulds are installed in the simulating sand box to carry out filling tests; test results can be obtained by sensors installed in the measuring device, the vibrating table, the simulating sand box and the test casting ladle, and test parameters can be automatically collected and converted by a computer. According to different working conditions and the different casting systems and moulds, a test scheme is made in a targeted mode, a regular conclusion is obtained, and the test stand has the advantages that researches are not limited by environment, sites and other factors, and the test stand is easy to operate, low in cost and the like.

The invention discloses a method for calculating a natural gas flow pressure scheduling decision index of a natural gas pipeline network. The method comprises the following steps: establishing a pressure calculation model of the natural gas pipeline network; substituting the actual pressure data of all gas source points, gas storage facilities and control nodes at the kth moment into the scheduling index model for calculation to obtain the operation pressure calculation values of all the gas source points, the gas storage facilities and the control nodes of the natural gas pipeline network at the (k + 1) th moment; and calculating the natural gas flow pressure values of the gas storage facilities, the gas source points and the control nodes. According to the method for calculating the natural gas flow pressure scheduling decision index of the natural gas pipeline network, a mode of modeling decision index parameters of key nodes is adopted, so that the operation condition of the gas pipeline network can be simulated; the problems that a common hydraulic simulation method is large in actual data deviation degree, long in consumed time period, not timely in reaction and insufficient in safety and reliability, and an empirical index method lacks scientific support and is narrow in application range are solved.

The invention discloses a water supply network key valve identification method, and relates to the field of water supply pipe network valve intelligent regulation. The method comprises: firstly, setting a basic situation, wherein valves in a water supply pipe network are in a normal state; carrying out topological analysis and pressure-driven water quantity hydraulic simulation on the water supplypipe network, and calculating the values of four indexes including the valve closing number, the total length of pipelines in a partition area, steady-state hydraulic simulation and delay simulation;Secondly, simulating the failure of each valve in sequence according to the number of the valve, repeating the above steps, and calculating four index values again; And finally, sequentially calculating the index values under the condition that the valves fail and the change values of the corresponding index values under the normal work of the valves, determining the degree of influence of valvefailure on the performance of the water supply system, and further identifying key valves in the system. A comprehensive evaluation system of the performance index and the hydraulic index is used forevaluating the valve failure influence, identification of key valves in the system is achieved, and support is provided for a decision maker to formulate a reasonable valve maintenance scheme.

According to the CFD parallel processing method for the thermal hydraulic simulation software of the nuclear reactor, by means of the SW many-core architecture, the CFD simulation time can be greatlyshortened, and the program running performance is improved. The method comprises the steps that the value of n2 in matrix multiplication in thermal hydraulic simulation software CFD is judged, the matrix multiplication represents that A, B and C represent double-precision floating point matrixes, n1, n2 and n3 represent the sizes of matrix dimensions, N is equal to n2, and N represents the order of a spectral unit; if 12 < = n2 < = 24, whether n1 is equal to N2 or not is judged; if n1-N2, data segmentation is conducted on the matrix A according to the number M of the slave cores, the segmenteddata are distributed to the local memories of the M slave cores, the matrix B is completely read into the local memories of the M slave cores, each slave core executes a matrix multiplication calculation task according to the data in the local memories, and after the task is completed, a calculation result is distributed back to the address of the main memory corresponding to the matrix C. The method is suitable for the field of nuclear reactor thermal hydraulic simulation.

The present invention discloses a node flow optimization distribution method for improving the accuracy of transient hydraulic simulation of a water supply in-series pipeline. The present invention optimizes the flow distribution coefficients of intermediate nodes to minimize the impact thereof on the calculation and analysis of transient flow. Further, the simplified error generated by the node flow distribution can be quantified and evaluated by the control threshold of the simplified errors to achieve effective control of the simplified process. In addition, the simplified operation of the method of the present invention is carried out sequentially from the intermediate node with the smallest simplified error, which effectively overcomes the potential defect of the conventional node flow distribution that leads to a significant reduction in the accuracy of the model, and can ensure the reliability and accuracy of the simplified operation of the same-diameter in-series pipeline.

The invention discloses a river channel flood discharge early warning method based on hydraulic simulation, and relates to the field of river channel flood routing and early warning. As reservoir flood discharge and river channel natural flow processes have obvious difference, on the basis of constructing a one-dimensional hydraulic model for a river channel, each obtained fracture surface water level sequence is simulated according to the model, and the flood rising time, flood peak reaching time and corresponding rising water level and peak value water level due to reservoir flood dischargeare automatically identified and extracted. The method is suitable for hydraulic simulation of the river channel, flood propagation time and magnitude prediction, has universality, is simple and easyto operate, can calculate flood propagation process according to a drainage plan of a hydraulic building or hydrological prediction of a natural river channel, and provides early warning information for disaster prevention and reduction of a downstream area.