45 results about "Impact model" patented technology

The invention relates to a drilling speed increase evaluation method based on drill stem-drill bit-rock-shaft system full-scale drilling simulation. According to the technical scheme, the method comprises the following steps: firstly, establishing a finite element model based on drill stem-drill bit-rock-shaft system full-scale drilling simulation, then, analyzing and solving the established model according to the explicit integration algorithm, and finally, evaluating the drilling speed increase according to established evaluation criteria. The process of establishing the finite element model comprises the following steps: establishing a grid model of all components, defining the physical properties of the components and the constitutive relation and breaking failure criteria of rock, establishing a drill tool and well wall random contact and impact model and a drill bit and rock interaction model, and defining boundary conditions. According to the method, the real-time drilling and rock breaking process is simulated with drill bit rock breaking as the boundary conditions of the lower end of the drill stem, and therefore simulation results are closer to the reality, and references are provided for on-site drilling design, drilling parameter optimization, drill bit model selection and drilling speed increase evaluation.

The invention is an optimization method comprising of: (a) uniform and efficient model and associated methods for computing the energy and emission impacts of each of a range of technological and commercial options, and (b) an integrated and efficient optimization model for trading off the technological and commercial options against each other to arrive at a financially optimal solution that complies with regulatory caps on emission. The energy and emission impact model handles options such as energy efficiency measures, renewable energy projects, carbon capture projects and carbon offsets. In addition to handling the direct emissions, the model handles indirect emissions resulting from purchased electricity or fuel. The integrated optimization model selects the solution that maximizes the total net present value of savings across the various technological and commercial options considering the location specific rates, prices and carbon caps as well as the different levels of investments within each project to choose from; this model performs this optimization over a series of time periods respecting capital budget and operational budget constraints. The quantities of carbon offsets that must be purchased or sold are also determined as part of this integrated model.

Weather metrics data and a weather factor relationship knowledgebase are received and used to forecast the weather-based demand. The weather factor relationship knowledgebase can be a weather-impact model. The weather-impact model can comprise at least one of an empirical scoring matrix, a weather indices template, and a proxy model conditions template. The weather-impact model can be derived from an analysis of normalized proxy sales history data. Optionally, the weather-based demand can be scaled, deaggregated, or both.

A method for predicting an impact of a service level agreement including collecting workload data and effort data and constructing a cost model for the service level agreement, defining a baseline service parameter corresponding to the code model of the service level agreement, and calibrating the cost model of the service level agreement, by calibrating a workload volume from the workload data and an effort time from the effort data to match the baseline service parameter, to output a service level agreement impact model.

The invention provides an automatic tunnel inverted arch impact model system. The automatic tunnel inverted arch impact model system includes an impact device and an impact model test groove; the impact device comprises a bracket, a driving mechanism which is used for outputting power and is arranged on the bracket, a transmission mechanism which is connected with the driving mechanism and is used for transmitting the power outputted by the driving mechanism, and a drop hammer assembly which comprises a hammer and is connected with the transmission mechanism, and receives the power outputted by the driving mechanism through the transmission mechanism so that the hammer can return to an original position after free fall; the impact model test groove includes a railway ballast groove located at the upper layer, force transfer iron blocks which are located just below the hammer of the hammer assembly and are used for accommodating railway ballasts and simulating rails, an inverted arch test piece which is located at the middle and is used for simulating an inverted arch structure, and a surrounding rock model box which is located at the lower part and is used for simulating rock and soil layers in a tunnel. The automatic tunnel inverted arch impact model system of the invention has the advantages of simple structure, simple operation, capability of quickly and accurately performing impact tests, and reliable test data.

The invention discloses a testing device for an interactive impact model of a lander and a soil body, which comprises a crossbeam, a cotton thread, a side column, an upper crossbeam supporter, an impact barrel, a lower crossbeam supporter, a glide guide rail, a computer, a signal processor, a soil box, a movable sliding rail and a displacement meter, wherein the crossbeam and the movable sliding rail are respectively fixed at the top and the bottom of the side column; a center below the crossbeam is fixedly connected with the displacement meter; the upper crossbeam supporter and the lower crossbeam supporter are riveted on the side column; the glide guide rail is fixed through the upper crossbeam supporter and the lower crossbeam supporter; the impact barrel is mounted on the glide guide rail and is tensioned and stabilized through the cotton thread; and the soil box is arranged below the impact barrel. By using the testing device, through controlling a height and the mass of a weight, the soil body is impacted with a predetermined impact speed and an impact mass; the testing parameters needed by an impact are conveniently measured in real time; and the interactive power characteristics in an impact process are reflected.

The invention provides a gear meshing impact model with a base pitch error, which belongs to the technical field of mechanical transmissions. The base pitch error of a gear can lead out-of-line meshing of a gear pair. In an out-of-line meshing section, a circumstance that a contact point on a driving gear moves from a tooth top to a tooth root and a contact point on a driven gear moves from a tooth root to a tooth top can occur, that is a reversal order meshing phenomenon. The invention, by using an angular velocity error model and an angular acceleration error model of a reversal order process, provides an analytic model of the meshing impact led by the gear reversal order meshing phenomenon. A relation function between geometric parameters of the gear and the base pitch error is constructed by doing study on the reversal order meshing phenomenon and analyzing a transmission error curve, an angular velocity error curve and an angular acceleration error curve, so that a batter explanation is provided for the meshing impact to the gear pair.

The present invention relates to a method for increasing motion stability of a link mechanism with a clearance. According to the multi-body system dynamics theory, based on multi-body system dynamics and kinematic pair clearance contact impact models, a link mechanism dynamics model taking regard of the kinematic pair clearance is established, the influence of the clearance on link mechanism dynamics behaviors is numerically simulated and analyzed, then to minimize the maximum peak of motion acceleration jitters of the link mechanism, the influence of the clearance is reduced by optimally designing and adjusting the mechanism rod length, and furthermore, the motion stability of the mechanism is increased. Through optimally designing and adjusting the mechanism rod length, the influence of the clearance on mechanism performance is reduced, and the motion stability of the mechanism with the clearance is increased. The method is simple, feasible and practical, clearance impact characteristics are considered, and furthermore, the method can be widely used in link mechanisms of various types.

The invention provides a design mode reliability analysis method based on probabilistic model test. The method comprises the following steps: determining the number of levels of external impact of a system and influence judgment conditions of impact levels on the system; establishing a system mixed extreme operation impact model; performing formalized description on the mixed extreme operation impact model, and establishing an impact layer continuous time Markov model; performing formalized description on different design mode abstracts, and establishing a design mode layer continuous time Markov model; establishing a corresponding relationship between system states and state transition rates of the impact layer and the design mode layer, and constructing an overall continuous time Markovmodel; defining a continuous random logic attribute specification formula of the system; and inputting the overall continuous Markov model and the continuous random logic attribute specification intothe PRISM, and carrying out reliability verification on the design mode. Reliability quantitative analysis and evaluation can be carried out on different design modes considering the impact effect, and researchers are assisted to carry out design mode level improvement and final decision making.

The invention discloses a simulation analysis method and a device. The method comprises the following steps: establishing a simulation contact collision model corresponding to a ball screw pair; according to the simulation contact impact model, the contact impact state of ball screw pair is analyzed. The invention solves the technical problem that it is difficult to analyze the motion and the contact collision state of the ball screw pair due to the sealing property of the ball screw pair.

The invention relates to a numerical simulation method for prestressed shot blasting forming of a ribbed wallboard. The numerical simulation method comprises the following steps: step 1, establishingan association model of shot blasting simulation parameters corresponding to input shot blasting process parameters and output shot blasting process parameters of the ribbed wallboard; 2, establishinga multi-shot impact model of the ribbed wall plate, enabling the surface of the model to be impacted by multiple shots, creating a path of a shot blasting area along the thickness direction of the model, and obtaining path node stress; and 3, establishing a reverse bending stress field method simulation model of the ribbed wall plate, converting the wall plate into a finite element shell unit according to geometric and stress characteristics of the wall plate, carrying out partition processing, and endowing a stress field to the shell unit to carry out simulation deformation calculation. According to the invention, shot blasting forming stress field method numerical simulation based on shot blasting induced stress is creatively achieved, and the prestressed shot blasting forming effect ofthe ribbed wall plate is greatly improved.

The invention relates to the field of collaborative robots, in particular to an intrinsic safety design method for a collaborative robot. The intrinsic safety design method for the collaborative robot comprises the following steps of: 1, analyzing a working performance of the collaborative robot; 2, designing an upper layer of the collaborative robot; 3, performing risk analysis on the collaborative robot, and determining a safety risk type and a safety evaluation index; 4, performing correlation analysis on the working performance and the safety performance of the robot, and determining indexes having coupling influence on the working performance and the safety performance of the collaborative robot; 5, establishing a man-machine interaction impact model, drawing a human body biomechanics limit index-based danger level safety table, and determining a coupling index parameter range according to the safety table; and 6, according to the coupling index parameter range obtained in the step 5, performing safety design on the basis of the collaborative robot optimized in the step 2. According to the intrinsic safety design method for the collaborative robot provided by the invention, the safety performance indexes and the working performance indexes of the mutually coupled collaborative robots can be balanced and maximized at the same time.

The invention discloses a shot blasting deformation numerical simulation method considering coverage rate and path, which comprises a single-shot impact model, shot number and shot coordinate calculation, a multi-shot impact model and a part deformation prediction model, and specifically comprises the following steps: firstly, establishing the single-shot impact model; then, according to the obtained crater diameter, calculating to obtain the number and coordinates of projectiles meeting the coverage rate requirement; secondly, establishing a multi-projectile model to obtain a depth-stress curve; thirdly, establishing a part deformation prediction model, endowing a stress value to a part to obtain part deformation; then, establishing a new part model, endowing the part with a temperature gradient field, changing the material expansion rate, and making the deformation of the part under the temperature gradient field similar to that under the stress field; and finally, giving the temperature gradient field to the part according to the path, and obtaining the deformation of the part under the specific shot blasting path. According to the method, the influence of the coverage rate and the shot blasting path on part deformation is considered, and the method can play a guiding role in optimization of process parameters in practice.

The invention provides a kinetic modeling method for a rotor system with insufficient interference force-eccentric coupling fault, and the method comprises the steps of building a disc shaft gap contact model based on a rub-impact model of a Hertz contact theory; meanwhile, according to the structural vibration principle of the rotor system, adding an eccentric fault into the rotor system; combining a disc shaft contact theory with a structure vibration model, so that a kinetic model of the eccentric coupling fault rotor system with insufficient interference force is established. When the model is established, it is assumed that the turntable is installed at the positive part of the shaft, and in order to research the characteristics of a disc shaft loosening eccentric coupling fault system, whirling influences possibly caused by other parts on the rotor are ignored. Aiming at the complex and diverse working conditions of the rotor system in engineering practice, the method employs thedisc-shaft contact theory and the vibration principle of the rotor system to establish the interference force deficiency eccentric coupling fault model, accords with the engineering practice better,and can analyze the influence of the interference force deficiency and the eccentric fault on the rotor system at the same time.

The invention relates to a dynamic batching active-disturbance-rejection control method, and belongs to the field of a building material dynamic batching technology. The method comprises the following steps: step one, establishing a dynamic batching system motor frequency and material flow model; step two, establishing a belt scale material impact model in a dynamic batching process; step three, establishing a dynamic batching system weighing model; and step four, through combination with the dynamic batching system motor frequency and material flow model in step one and the belt scale material impact model in step two and the dynamic batching system weighing model in step three, establishing a dynamic batching system active-disturbance-rejection control model by use of a modern advanced active-disturbance-rejection control technology so as to realize dynamic batching active-disturbance-rejection control. According to the invention, through combination of a mechanism analysis and a modern advanced control technology, the ratio precision of the dynamic batching process is controlled, accurate batching of a building material dynamic batching system is realized, and the method has high robustness and high anti-interference performance in application of the dynamic batching system and thus has wide application prospect.

The embodiment of the invention discloses a method and device for analyzing a steam seal rub-impact fault of a shaft system of a steam turbine generator unit. The method is used for solving the problem of how to achieve steam seal rub-impact fault thermosetting coupling of a shaft system of an actual large steam turbine generator unit, and comprises the steps: establishing a finite element model of the shaft system of the actual steam turbine generator unit, and associating a steam seal rub-impact model with the finite element model; according to the incidence relation, the relative displacement of the rotor center and the steam seal ring center, the gap radius of the steam seal ring and the relation between the relative displacement and the gap radius of the steam seal ring, determiningthat steam seal collision grinding occurs; determining the pretightening force of the spring piece on the steam seal ring, the speed of the rotor at the collision and grinding point and the stress ofthe rotor under the condition of steam seal collision and grinding; determining the bending moment of the rotor according to the translation displacement vector of each node of the shafting, the pre-tightening force of the spring piece on the steam seal ring, the speed of the rotor at the collision and grinding point and the stress of the rotor; and according to the bending moment of the rotor, determining a friction heat source of the rotor with the steam seal rub-impact fault.

The invention discloses an impact model emission device for automobile impact experiment. The impact model emission device comprises a pressure container, an air inflation electrically-operated valve,an emission pipe body, an air guide pipeline, an exhaust electrically-operated valve, an emission mechanism, a positioning mechanism, a groove guide rail and a controller, wherein the air inflation electrically-operated valve is arranged between an air inflation hole of the pressure container and an external air supply system, the emission pipe body is horizontally arranged in the pressure container, one end of the air guide pipeline is connected with a first end of the emission pipe body, the other end of the air guide pipeline is connected to a peripheral surface of the pressure container and an inner cavity of the pressure container, the exhaust electrically-operated valve is arranged between the air guide pipeline and the emission pipe body, the emission mechanism is arranged in the emission pipe body, the positioning mechanism is arranged on the emission mechanism, the groove guide rail is arranged on front ground of the pressure container, and the controller is connected with the air inflation electrically-operated valve and the exhaust electrically-operated valve. The impact model emission device is simple in structure and small in occupancy space and is convenient to operate and is easy to promote.

The embodiment of the invention discloses a safety determination method and device for a pipeline cleaning process and a computer storage medium, and belongs to the technical field of oil gas. The method comprises the following steps: acquiring basic data of a target pipeline, wherein the target pipeline is any pipeline in to-be-evaluated pipelines; according to the basic data, a pigging impact model of the target pipeline is established through a finite element method, and the pigging impact model is used for simulating stress conditions of a bottom elbow part of the target pipeline when the target pipeline is subjected to pigging operation under different conditions; simulating the stress condition of the target pipeline during pipe cleaning operation through the pipe cleaning impact model to obtain simulation data; and determining the safety of the target pipeline during pipe cleaning operation according to the simulation data. According to the embodiment of the invention, the stress condition of the elbow part at the bottom of the target pipeline is simulated, so that the safety of the target pipeline during pipe cleaning operation can be evaluated, the safety of the target pipeline during pipe cleaning operation is ensured, and the accident occurrence possibility is reduced.

The invention discloses a correction method of a fish-friendly pump blade impact model based on CFD, and relates to the field of fluid machinery, CFD numerical simulation is used to obtain a differential pressure gradient in an axial flow pump impeller along a circumferential tangential direction, and then an average differential pressure gradient Pave in the axial flow pump impeller is obtained; and force acting on the surface of the fish body is obtained according to the average pressure difference gradient Pave and the side area of the fish body, then the acceleration of the fish body is obtained according to the mass of the fish body, and finally the critical time when the fish body is impacted by the blade in the process of entering the axial flow pump impeller blade inlet overflowing section is obtained, so that a traditional blade impact model is corrected. According to the method, the average pressure difference in the impeller in the circumferential direction is obtained based on the CFD numerical simulation result, the blade impact probability formula is corrected according to the influence of the pressure difference on the fish body, the prediction error of the blade impact probability can be effectively reduced through the correction, and the blade impact probability and the blade impact death rate prediction value are more accurate.

A computing device, method and computer program product track the movement of objects and identify potential collisions between object influence models of two or more objects. In a method, an object influence model is defined for a respective object with the object influence model having a shape and volume that encompasses the respective object. The object influence model extends beyond the respective object and varies in response to changes in one or more properties of the object. The method also includes receiving information from one or more sensors indicative of movement of the respective object and predicting its anticipated path of travel. The method further includes identifying a potential collision between the respective object and another object in an instance in which the object influence models of the respective object and another object intersect as the respective object is advanced along the anticipated path of travel.

The invention relates to an equivalent shot peening numerical simulation method based on a temperature field, belonging to the shot peening molding field. The method includes establishing the temperature field model of panel parts and single projectile impact model; the temperature field model includes a uniform temperature field and a temperature gradient. The depth of temperature gradient is thethickness of equivalent plastic layer, and the width of temperature gradient is the width of effective narrow band of shot peening. The equivalent plastic layer is obtained from the single projectilemodel. In the single projectile model, different shot peening parameters correspond to different equivalent plastic layers. Loading the temperature field of the flat blank according to the planned shot peening path; the bending effect of the temperature field model can be verified by shot peening experiments. The invention has the advantages of greatly shortening the numerical simulation calculation time, rapidly calculating the overall effect of shot peening molding, and formulating the shot peening process optimization scheme, so that the trial and error methods commonly used in actual production can be avoided to a large extent.

The invention discloses a method for correcting the collision probability of a fish-friendly axial flow pump and fishes, and relates to the field of fluid machinery. Collision of a fish body and the back of a blade is combined with a traditional blade collision model to obtain a corrected blade collision model; specifically, firstly, the impact of the blade back on a fish body is quantified to obtain the impact probability Pth back of the fish body and the blade back, and then the traditional blade impact models Pth and Pth back are summed to obtain a corrected blade impact model Pth repair. According to the correction method disclosed by the invention, the traditional blade impact probability model is corrected, so that guidance on the design of the fish-friendly axial flow pump can be realized.