37results about How to "Reliable optimization results" patented technology

The invention discloses a hydrofracture design parameter optimization method based on fine classification of a reservoir. The hydrofracture design parameter optimization method based on fine classification of the reservoir comprises the following steps of (A) calculating current stratum coefficients Kh corresponding to all oil wells on the reservoir; (B) dividing the reservoir into four small categories; (C) calculating a net present value after hydrofracture for 3 years under the conditions that the fracture length ratio of a hydrofracture crack is 0.18-0.43 and the flow guiding capability of the hydrofracture crack is 10D.cm, 20D.cm, 30D.cm, 40D.cm and 50D.cm, and drawing a curve graph by using the fracture length ratio of the crack as an abscissa and the net present value after hydrofracture for 3 years as an ordinate; (D) using the crack fracture length ratio and the crack flow guiding capability which correspond to an inflection point with the maximum net present value as the optimal hydrofracture design parameters of the small categories of the reservoir; and (E) designing hydrofracture schemes on the different small categories of the reservoir by using the different optimal hydrofracture parameters. The principle of the hydrofracture design parameter optimization method is reliable; and the hydrofracture design parameter optimization method is easy and convenient to implement and can provide a refined guidance for parameter optimization in the hydrofracture scheme design.

The invention discloses a gas-liquid separator for a multi-connected heat pump and a manufacturing method of the gas-liquid separator. The gas-liquid separator comprises a barrel, a gas inlet pipe, a gas outlet pipe and a liquid outlet pipe, a gas-liquid separation coiler is connected to the gas inlet pipe, the other end of the gas-liquid separation coiler faces the gas outlet pipe, and a liquid pocket is connected to the lower end of the gas-liquid separation coiler; and a thermostatic controller is installed on the barrel and is used for maintaining the temperature in the device. The manufacturing steps of the gas-liquid separator include that (1) physical design of the gas-liquid separator is carried out; (2) sample testing of the gas-liquid separator is carried out; (3) material preparation is made; (4) part machining is carried out; (5) part assembling is carried out; (6) welding is carried out; and (7) aftertreatment is carried out. According to the manufacturing method, the molding rate is high, the inferior-quality product rate is low, the product quality is high, and huge economic benefits can be brought to enterprises; and the gas-liquid separator is high in separation efficiency, thorough in gas-liquid separation and long in service life.

The invention relates to an optimal design method for an exciting electrode of a piezoelectric vibration gyro. The method comprises the following steps: (1) establishing a finite element model of the piezoelectric vibration gyro and configuring material and structure parameters of each part according to the actual condition; (2) performing modal analysis to obtain the inherent frequency and the relevant vibration mode of a harmonic oscillator, applying sine exciting voltage to a piezoelectric electrode on the basis, and performing harmonic response analysis; (3) deducing the influence rule of each parameter of the exciting electrode on the harmonic oscillator through the analysis result of the step (2); and (4) based on comprehensive consideration in many respects, selecting optimal design parameters. By the method, a definite element emulation analysis method is adopted, the defects of an experience cut-and-try method are overcome, the design efficiency and accuracy of the exciting electrode are improved, the research and development cost is reduced, the research and development process is accelerated, and a reference is provided for reasonable design of the exciting electrode of the piezoelectric vibration gyro.

The invention discloses a high-precision automobile steering gear bracket and a manufacturing method thereof. The steering gear bracket comprises a fixing base, a mounting base and a connecting plate, wherein a rotary table is mounted in the fixing base; locking screw rods are connected to the rotary table; a U-shaped connecting piece and screw holes are connected to the side surface of the mounting base; a mounting groove is formed in the U-shaped connecting piece; a hydraulic oil cylinder is arranged in the connecting plate; a piston rod is connected to the hydraulic oil cylinder; and a press block is connected to the piston rod. The manufacturing method of the steering gear bracket comprises the following steps of (1) designing the structure of the steering gear bracket; (2) performing sample test; (3) performing simulated die-casting on the steering gear bracket; (4) performing simulated die-casting; and (5) performing die-casting of the steering gear bracket. Compared with the prior art, mechanical analysis of models and mechanical test of real objects are respectively performed on the steering gear bracket disclosed by the invention, so that mechanical defects of a conventional steering gear bracket are thoroughly rejected, all the mechanical requirements are met, the quality of products is improved, and the steering gear bracket disclosed by the invention has tremendous potential economic value.

A method for designing the impeller of an axial flow pump under full working conditions, comprising the following steps: (1) Parametric modeling of the impeller of the axial flow pump: selecting k airfoil sections of the axial flow pump impeller, the cascade density and the total value of the airfoil placement angle 2k design parameters; (2) Optimal design for all working conditions: First, determine the conventional design parameters of the impeller; then perform numerical calculations on the design working conditions of the axial flow pump impeller, comprehensively analyze various losses in the pump, and minimize the total loss Preliminary design of a pair of axial flow pump impellers with better hydraulic performance under the design working conditions; second, design guide vanes, water guide cones and water inlet and outlet channels for the impeller; The optimal weighted average efficiency is the goal, and the head is the constraint condition. The sequential quadratic programming method of the gradient optimization algorithm is used to continuously change the design parameters of the axial flow pump impeller, and iterative numerical calculations are performed on the pump device. The invention adopts CFD numerical calculation, has high design precision and reliable optimization result.

The invention discloses a power system standby optimization method and system considering multiple fault scenes, and the method comprises the steps of dividing a plurality of independent fault scenesaccording to the load prediction data and equipment operation fault rate statistical data in a dispatching day; constructing a robust standby optimization model of the power system by taking minimum total cost as an optimization target and considering constraint conditions of a unit, a network and a fault scene; and solving the robust standby optimization model of the power system to obtain a standby optimization scheme of the power system. According to the invention, a power system robust random standby optimization model considering multiple fault scenes and fault probability uncertainty isconstructed. According to the invention, the system reserve capacity can be optimized under the condition of considering multiple fault scenes and uncertainty of the multiple fault scenes, a robust optimization uncertainty description method is adopted, simulation operation is more comprehensive, an optimization result is more reliable and comprehensive, and the engineering application value of power system reserve configuration is improved.

The invention discloses an optimization method of a degeneration acceleration test scheme of an electric connector. The sample size used in a stress-constant degeneration acceleration test and the distribution ratio of samples in different tests influence a test result. The method comprises the concrete steps that 1) the working life tg, the storage environment temperature T0, the lowest test temperature Tz, the highest test temperature Tm and the cutoff time tau of the electric connector are determined; 2) a random process degeneration model of median life of the electric connector is established; 3) m electric connectors to be detected are taken for primary test to obtain parameters a, b, gamma0 and gamma 1 to be evaluated; 4) an optimized target function is determined; and 5) the test temperature and sample distribution ratio of each test are determined. According to the optimization method, the sample distribution ratio of each test is optimized, and the storage life is estimated in higher precision compared with a traditional test scheme in which samples are distributed equivalently under the same total sample size, the same cutoff time, and the same test interval.

The invention relates to a distribution network reactive power optimization control sequence determining method based on big data. The method comprises the following steps: taking the existing historical load data and historical optimization data of a power system as a data source; constructing a distribution network reactive power optimization random matrix; calculating the average spectral radius of the load random matrix based on the ring law; calculating the correlation coefficient of historical load and current load; obtaining a load day with larger correlation by comparing the values of correlation coefficient, and taking the reactive power optimization control sequence of the day as the current optimization sequence. Through the technical scheme of the invention, the problem concerning distribution network reactive power operation optimization is solved.

The invention provides a bogie suspension parameter optimization matching method, which relates to the technical field of suspension parameter optimization design of rolling stock. Establish vehicle dynamics simulation model; carry out suspension parameter matching optimization analysis, determine the input variables and their value ranges required by the model, output evaluation indicators and their threshold settings, and establish a joint simulation module between vehicle dynamics model simulation and MATLAB, According to the optimization goal, the eigenvalue simulation calculation of the vehicle dynamics model is carried out, and the optimization goal value obtained by the simulation is extracted through the co-simulation interface; the required suspension parameter group is obtained from a large number of random parameters by layer-by-layer screening, Finally, the method of discrete statistics is used to process the optimization result data, combining the three-dimensional histogram to mine the matching relationship between the suspension parameters, and according to the actual needs, select the specific value of the matching combination of suspension parameters that meet the requirements and the corresponding optimization target value .

A DOE-based optimization method for the anti-collision performance of the front bumper of the automobile belongs to the technical field of the structural design of the front bumper of the automobile. The peak value of the contact force of the roll-pressed front bumper is taken as the target, and the aluminum alloy front bumper with the largest weight reduction ratio is brought into the vehicle working condition for verification, the variable range and response are set and the optimization calculation is carried out. The optimal solution is obtained from the verification of the working conditions of the whole vehicle. The beneficial effect of the present invention is that the optimization method compares the simulation model with the test model, optimizes the simulation model, performs optimization calculations on multiple groups of variables and responses, and obtains the solution After repeated verification, the optimal solution is finally obtained. The efficiency of model establishment and optimization calculation is high, and the optimization result of the front beam is more reliable, which provides strong data support for the production design of the front beam and saves the company's product development. cost.

The invention discloses a hydrofracture design parameter optimization method based on fine classification of a reservoir. The hydrofracture design parameter optimization method based on fine classification of the reservoir comprises the following steps of (A) calculating current stratum coefficients Kh corresponding to all oil wells on the reservoir; (B) dividing the reservoir into four small categories; (C) calculating a net present value after hydrofracture for 3 years under the conditions that the fracture length ratio of a hydrofracture crack is 0.18-0.43 and the flow guiding capability of the hydrofracture crack is 10D.cm, 20D.cm, 30D.cm, 40D.cm and 50D.cm, and drawing a curve graph by using the fracture length ratio of the crack as an abscissa and the net present value after hydrofracture for 3 years as an ordinate; (D) using the crack fracture length ratio and the crack flow guiding capability which correspond to an inflection point with the maximum net present value as the optimal hydrofracture design parameters of the small categories of the reservoir; and (E) designing hydrofracture schemes on the different small categories of the reservoir by using the different optimal hydrofracture parameters. The principle of the hydrofracture design parameter optimization method is reliable; and the hydrofracture design parameter optimization method is easy and convenient to implement and can provide a refined guidance for parameter optimization in the hydrofracture scheme design.

The invention discloses a high-precision automobile steering gear bracket and a manufacturing method thereof. The steering gear bracket comprises a fixing base, a mounting base and a connecting plate, wherein a rotary table is mounted in the fixing base; locking screw rods are connected to the rotary table; a U-shaped connecting piece and screw holes are connected to the side surface of the mounting base; a mounting groove is formed in the U-shaped connecting piece; a hydraulic oil cylinder is arranged in the connecting plate; a piston rod is connected to the hydraulic oil cylinder; and a press block is connected to the piston rod. The manufacturing method of the steering gear bracket comprises the following steps of (1) designing the structure of the steering gear bracket; (2) performing sample test; (3) performing simulated die-casting on the steering gear bracket; (4) performing simulated die-casting; and (5) performing die-casting of the steering gear bracket. Compared with the prior art, mechanical analysis of models and mechanical test of real objects are respectively performed on the steering gear bracket disclosed by the invention, so that mechanical defects of a conventional steering gear bracket are thoroughly rejected, all the mechanical requirements are met, the quality of products is improved, and the steering gear bracket disclosed by the invention has tremendous potential economic value.

The invention discloses a deep shale gas reservoir fracturing optimization method based on fracability evaluation, which includes: obtaining geological parameters, establishing a three-dimensional geological model; performing grid division on the geological model and calculating the fracturing of all geological grids respectively Comprehensive fracturing index; according to the comprehensive fracturing index, all geological grids are divided into three levels and the geological grids of the same level are classified into the same level of fracturing section; for each level of fracturing The production simulation is carried out under the conditions of fixed fluid intensity and different sanding intensity, and the construction curves of different stages are obtained. The highest inflection point of the curve is the optimal fracturing design parameter; According to the calculated stages, directly select the optimal fracturing design parameters of this stage determined in the previous step as the optimal parameters for construction. The present invention obtains a more comprehensive characterization of the fracturability of the fracturing interval, and conducts more precise fracturing design parameter optimization for each fracturing well section, so that the optimization result is more reliable and has practical significance.

The invention discloses a spatial position and posture solving method based on integral target optimization, and belongs to the field of production, maintenance and service of vehicles. According to the spatial position and posture solving method based on integral target optimization, imaging of targets in different states can be taken as imaging of a same target on cameras, the cameras in different states can be used for shooting the targets at different spatial positions, known spatial points are projected into the cameras for imaging according to the related principle of three-dimensional reconstruction, constraint is done based on minimum back projection, least square solving is performed to acquire the positions of the cameras, the cameras (corresponding to large target extraction errors caused by factors such as shaking during movement) with large residual errors are eliminated, and accurate postures and positions of the targets are acquired through back calculation.

An aviation command guaranty optimization method based on a discrete event system comprises the following steps: firstly, obtaining an aviation command guaranty simulation task and dividing an aviation command guaranty process into a shipboard sub-process, a takeoff sub-process and a landing sub-process; obtaining all discrete events of each sub-process and establishing a discrete event model of the aviation command guaranty process; finishing the aviation command guaranty simulation task to obtain the discrete event system corresponding to the aviation command guaranty simulation task; establishing a discrete event system corresponding to a simulated aviation command guaranty simulation task in process simulation software; finally, obtaining an operation time threshold value range of each discrete event and comparing to obtain an abnormal discrete event which is used as a discrete event needing to be adjusted, and outputting the abnormal discrete event. By adopting the aviation command guaranty optimization method, analysis of the aviation command guaranty process and simulation of a landing success probability are realized, and the abnormal discrete event of an aviation command guaranty system can be found and are pointedly optimized, so that the aviation command guaranty optimization method has better applicable value.