1149 results about "Mechanical models" patented technology

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

A physical model representing an anatomic model of the abdominal wall that provides for the option of: tactile feedback, the option for photo realism, the inclusion of various pathologies (including, but not limited to, abdominal wall defects such as hernia), and the customizability to mount the model to various training boxes or frames. This medical / anatomic simulation model is composed of various material layers including, but not limited to, non-elastomeric and elastomeric materials such as papers, fabrics, metallic sheets, metallic meshes, rubber-like foams, and other materials. This is a physical / mechanical model that simulates skin, tissue, and organs associated with abdominal wall morphology and pathology.

Methods and systems to analyze and predict patient-specific physiological behavior of a human organ or anatomical entity such as the heart complex and the heart subcomponents from 3-dimensional volumetric ultrasound (3D) or time-sequential volumetric (4D) ultrasound image data, to assist physicians in performing diagnostics and cardiac preoperative planning. Also disclosed herein are methods and systems to segment patient-specific anatomical features from 3D / 4D ultrasound. Also disclosed herein are methods and systems to compute patient-specific tissue motion and blood flow from 3D / 4D ultrasound and contrast-enhanced 3D / 4D ultrasound image data. Also disclosed herein are methods and systems to simulate the patient-specific mechanical behavior of the organ and anatomical entity using both 3D / 4D ultrasound and mechanical models. Also disclosed herein are methods and systems to estimate tissue stress and strain and physiological parameters of the tissues from 3D / 4D ultrasound.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformations.

Action data for the animation of characters is generated in a computer animation system. Body part positions for a selected character are positioned in response to body part positions captured from performance data. The positions and orientations of body parts are identified for a generic actor in response to a performance in combination with a bio-mechanical model. As a separate stage of processing, positions and orientations of body parts for a character are identified in response to the position and orientation of body parts for the generic actor in combination with a bio-mechanical model. Registration data for the performance associates body parts of the performance and body parts of the generic actor. Similar registration data for the character associates body parts in the generic actor with body parts of the character. In this way, using the generic actor model, it is possible to combine any performance data that has been registered to the generic actor with any character definitions that have been associated to a similar generic actor.

The invention discloses a health monitoring system and method for a wind generator system structure. The system provided by the invention comprises a data storage analytical device and a data collecting device, wherein the data storage analytical device and the data collecting device are communicated through a wireless signal, the data storage analytical device comprises a mechanical model analytical module, a data receiving module, a structure safety judging module, a vascular grade judging module and a vascular execution module; the data collecting device comprises a sensor group and a data transmitting module, and the sensor group is connected with the data transmission module through a wire cable; and the system judges whether the structure is damaged or not through a certain detection means and a method, the locating and evaluation of the damage are carried out to avoid the damage, thereby realizing the damage detection of a wind power generation infrastructure and health monitoring of a discriminating structure. Meanwhile, the invention also aims to provide a health monitoring method for the wind generator system structure.

There is provided a control system which controls a link structure constructed by connecting a plurality of rigid body links and driven by making a joint actuator generate an actuator force. The control system includes a mechanical model including geometric parameters and dynamical parameters of the link structure, a virtual external force calculating means for calculating a virtual force acting on the mechanical model of the link structure, a contact part detecting means for detecting contact parts between the link structure and the outside, and an actual force converting means for converting the virtual force calculated by the virtual external force calculating means into an external force capable of existing actually and the actuator force of the joint actuator, using contact information detected by the contact part detecting means. The joint actuator is made to generate the actuator force output by the actual force converting means.

A computer-implemented method for rapidly designing a vehicle package is disclosed. The method receives virtual vehicle package model data, converts the data into mechanical vehicle package model data and transmits the data to a mechanical vehicle package model system. A method is also disclosed for adjusting the mechanical model, converting the adjustment into data readable by a computer aided design system and transmitting the data to the computer aided design system for generating or modifying the virtual vehicle package. A system for designing a vehicle package is disclosed having a mechanical vehicle package model, a computer aided design system, a translator embodied in a computer system in communication with the computer aided design system and a mechanical vehicle package model in communication with the translator.

The present invention relates to a method for measuring steel structure bridge life by utilizing fracture mechanics. It includes an ultrasonic inspection process of steel structure bridge member, and utilizes actually-measured data to correct analog data so as to raise accuracy of structural calculation. Said measurement method includes seven steps: structural mechanics modeling, mechanical model correction, traffic load modeling, traffic load correction, ultrasonic inspection, member fracture mechanics model modeling and bridge structure technical state judgment.

The invention provides a laser dynamic deflection survey vehicle. The survey vehicle comprises a mobile measuring table, a measuring cross beam, a running wheel, a velocity measuring wheel, an accelerometer and a data acquiring and processing device. The laser dynamic deflection survey vehicle provided by the invention has the following advantages: according to the laser Doppler velocity measurement principle and the inertia measurement principle, during the driving process of the vehicle at a normal traffic velocity (15-80km / h), a plurality of laser Doppler vibration meters arranged in the front of loading wheels of the vehicle synchronously measure the relative movement velocity of various measuring points on a road surface; the instantaneous deflection deformation velocity of the road surface is obtained through inertia compensation calculation; and a dynamic deflection value of the road surface is obtained through inversion by utilizing a road layered elastic mechanical model and used for general investigation and assessment of the bearing capacity of a road network.

The invention relates to a multi-body dynamic quick analysis modeling method for a rotary steering drilling system. The method comprises the following steps of: (1) establishing a structural unit mechanical model according to structural information of the drilling system; (2) establishing constraint models which comprises a speed constraint model, an angular velocity constraint model, a rigid body-beam clamped constraint model and a beam-beam clamped constraint model; (3) establishing an acting force model; (4) establishing a drilling system parameterized model; and (5) importing a computation model file into a multi-body dynamic simulation program to perform dynamic analysis of the drilling system so as to finish modeling. Since the mechanical model of the drilling system is established on the basis of a multi-body dynamic basic principle, rotary motion and dynamic analysis of rotary steering whole well drill string system are realized, and a well bore path is dynamically predicted. The method can be widely applied to the fields of oil-gas fields and coal bed methane exploitation.

A satellite autonomous orbit determination method based on satellite-borne GNSS multiple antennas. According to the method, a Kalman filter is extended; multiple GNSS antennas measured pseudorange observation values are made full use of to carry out real-time filtering correction of an orbit prediction value using a high precision mechanical model; and high precision satellite orbit information is obtained. According to the invention, the problems of the high precision orbit determination in a complex posture maneuver can be solved. In the invention, the orbit determination result is high in precision, good in stability, and highly real-time, can meet the orbit determination demand of the low orbit satellite and high precision satellite, can be widely applied to the high precision orbit determination of the space station, high resolution earth observation satellite and other space missions, and has a wide promotion and application prospect.

The invention provides a novel coal and gas outburst similarity simulation test method based on a geological mechanical model test by referring a coal and gas outburst simulation test device and a geotechnical engineering multifunctional test device on the basis of the similar material simulation test concept and the technical concept of the geological mechanical model test. A large-sized three-dimensional coal and gas outburst simulation test device is designed and mainly comprises a reaction frame (1), a hydraulic load (2), a test box body (3), a roadway excavation device (4), a sealing and gas face inflating device (6) and the like. Gas is introduced into a test model of the test box body by establishing a geological structure coal test model (7), so that the geological mechanical model test and the coal and gas outburst similarity simulation test can be reasonably combined, the coal, rock, gas and complex geological structure are integrated, the coal and gas outburst mechanism under variable conditions of the complex geological structure and the coal seam gas reservoir can be explored, and a novel thought is provided for researching the coal and gas outburst mechanism.

A test system of 3D geologic mechanical model is composed of box testing device formed by connecting box cast steel component, angle element and chassis together through high strength bolts; hydraulic loading control system formed by variable ¿C load loading plate with thin jack at top, hydraulic loading control table and oil separator. It features that said loading plate is connected on left and right internal walls of box testing device through thin jack and said loading control table is connected to jack through oil separator and oil pipe.

The invention relates to a method for predicting a fluid-solid coupled characteristic value of an elastic hydrofoil and belongs to the technical field of turbomachinery simulation. The method comprises the steps of establishing a two-dimensional drainage basin-hydrofoil geometric model, dividing the gridding of a two-dimensional drainage basin, establishing a computational fluid mechanical model, calculating an initial steady flow field value and an unsteady flow field fluid-solid coupled value, and then performing after-processing on the calculation results to obtain the dynamic change process of the deformation of the flow field structure and the hydrofoil with time. The method for predicting the fluid-solid coupled characteristic value of the elastic hydrofoil has the advantages that the influence of an added mass effect on flowing is taken into account so that the stability of value calculation and the reliability of a numerical prediction result are improved, quick high-accuracy numerical prediction on an oscillation phenomenon induced by flowing around the elastic hydrofoil can be realized, and the flexibility of selection of numerical computation methods can be enhanced by virtue of secondary development of computational fluid mechanical software in combination with an embedded fluid-solid coupled algorithm.

The invention relates to a quantitative estimation and prediction method for icing load of a power transmission line, and belongs to the technical field of online monitoring of overhead power transmission lines. The method includes establishing a chaos time sequence model of a power transmission line icing process by using icing process historical data of a monitoring point and based on the phase space reconstruction theory; and establishing a quantitative estimation and prediction model of the icing load of the power transmission line based on a machine learning method of a support vector machine (SVM). According to the models, icing online estimation results based on a mechanical model are amended, or online estimated values are replaced when a mechanical sensing device fails, and trend prediction is performed on the icing process of the power transmission line based on micrometeorological information known in advance. The method has the advantages of being capable of amending online estimation results of the icing load of the power transmission line, provided with the capacity of estimating the icing load of the power transmission line based on micrometeorological data when the mechanical sensing device fails, and capable of predicting the icing load trend of the power transmission line according to the micrometeorological information of monitoring points known in advance.

The invention relates to a micro-torque mechanical testing machine and method. The testing machine comprises a control device and a testing machine host, wherein the control device is used for setting a testing method, sending a command to the testing machine host and analyzing and processing test data obtained from the testing machine host; and the testing machine host is used for loading a test sample. The testing method comprises the following steps of: controlling a signal generating module to generate a voltage signal through customized testing software, and driving the testing machine host to work after conditioning and amplifying; acquiring an angle signal and a coil driving signal by a signal acquisition module; converting the acquired angle signal into a rotation angle, and converting the acquired coil driving signal into a torque; and carrying out data processing according to a mechanical model to obtain a shear stress-shear strain curve of the test sample, thereby further calculating shear modulus and shear strength. By adopting electromagnetic driving and torque measuring ways, the torque resolution of the torque testing machine is greatly improved.

The invention provides an unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanical modeling method and device. The method includes the steps of determining an unconventional oil and gas reservoir horizontal well section object region; obtaining three-dimensional earthquake prestack gathered data in the object region; conducting elastic parametric inversion by adopting the three-dimensional earthquake prestack gathered data and obtaining a three-dimensional space elastic parameter data body in the object region, wherein the three-dimensional space elastic parameter data body comprises a rock mass poisson ratio and Young modulus; calculating a rock mass brittleness index according to the rock mass poisson ratio and the Young modulus; establishing a rock mass mechanical parameter model based on three-dimensional grid nodes according to the three-dimensional space elastic parameter data body and the rock mass brittleness index. The unconventional oil and gas reservoir horizontal well section three-dimensional rock mass mechanical modeling method and device can simply, effectively and accurately obtain an unconventional oil and gas reservoir rock mass mechanical model.

A computer system and method for predicting the aqueous phase CO2 corrosion rate of a pipe useful in the production and transportation of oil and gas. Input parameter values corresponding to water chemistry and physical fluid and pipe properties are received. Based on these input parameter values, the system and method derive current-voltage relationships for multiple cathodic reduction reactions according to an electrochemical model of the corrosion reaction, and a current-voltage relationship for the anodic oxidation reaction of iron dissolution. A current density is obtained, at the intersection of an extrapolation of the anodic current-voltage relationship and an extrapolation of the summed cathodic current-voltage relationships. The predicted corrosion rate is then calculated from the obtained current density. The effects of secondary parameters such as scale and flow regime, and the efficacy of a corrosion inhibitor, can also be evaluated.

The invention discloses a suspension type monorail vehicle dynamic model and a vehicle-bridge coupling power simulation method, belongs to the technical field of rail traffic and aims to solve the technical problem that an existing suspension type monorail dynamics simulation device is large in simulation result errors during rail beam local vibration research. By providing the suspension type monorail vehicle system dynamic model, a rubber wheel-rail surface contact mechanical model, a rail beam bottom plate and web equivalent surface force application method and a vehicle and rail beam coupling dynamic model building method, a suspension type monorail vehicle-rail beam coupling dynamic simulation system is built. By the model, the system and the method, suspension type monorail vehicle system suspension mechanism decoupling and equivalent treatment are achieved, and the technical problems that the existing suspension type monorail dynamics simulation device is large in simulation result errors during the rail beam local vibration research, rail beam dynamic stress and strain results are hard to extract, rail beam local strength destroying cannot be evaluated accurately and the like are solved.

The invention discloses a method and a device for detecting the icing thickness of a power transmission line. According to the method and the device, the advantages of morphology in image edge detection are utilized, and filtration and CB morphology edge processing are carried out on collected power transmission line icing images, so that noises are filtered out, meanwhile the edge information of the images can be accurately and effectively detected, and the calculation of the icing thickness of the power transmission line is realized. The technology is simple in principle, is visual and practicable, reliable in detection, and is not influenced by the transducer sensitivity and a selected mechanical model, so that beneficial efforts of morphologically measuring the icing thickness are performed, and a new detection technology is provided for the safe and stable operation of the power transmission line.

The invention discloses an implement method for automatic generation of a visible power grid trend chart in a dispatching system. The method comprises the following steps: (1) according to set chart forming granularity filter conditions, station pels and circuit pels are generated in a picture through a drawing tool of the dispatching system; (2) intelligent layout is conducted to the station pels through a network topological graph arithmetic based on an expanding mechanical model; (3) intelligent wiring is conducted to the picture after the intelligent layout by using a maze arithmetic; (4) a parameter in a bank is related automatically and labels such as measurement, a dynamic trend and a visible pie chart are conducted automatically, and the visible power grid trend chart is generated finally. According to the implement method for automatic generation of the visible power grid trend chart in the dispatching system, the visible power grid trend chart needed by the dispatching system can be generated rapidly, so that powerful technical support is provided to implement of the dispatching system and power grid analytical research. Due to intelligent and automatic chart forming process, efficiency is improved, omissions caused by human factors are greatly reduced and technical guarantee is provided to safe and stably running of a power grid.

The present invention is an apparatus and method for predicting the reactions of a subject, e.g., a human being to a proposition posed to the subject during a subject-object or a subject-subject interaction that takes place online or in real life. The quantum mechanical model adopted herein assigns a first subject qubit |iss1> to a primary internal state of the subject with eigenvalues corresponding to measurable indications a, b of the primary internal state. A response qubit |rsp> that can yield at least two mutually exclusive responses corresponding to two eigenvalues is also assigned to the subject. A proposition matrix PR in the form of a linear operator designed to act on response qubit |rsp> is assigned to enable a quantum mechanical derivation of response probabilities and expectation values for response to the same underlying proposition in various contexts, including incompatible contexts in the Heisenberg sense.

The present invention provides a response surface based optimization method for a single reed structure in a novel space deployable hinge. The method comprises: according to an actual operating environment of the single reed structure in the novel space deployable hinge, establishing a simplified mechanical model; performing equivalent processing on constraint and loading modes of the single reed structure; obtaining a first-five-order buckling mode and a buckling load of the structure based on ABAQUS; introducing an initial geometric defect to obtain a load-displacement curve, a critical buckling load and a stress distribution cloud chart of the structure; obtaining an optimization model with the maximum buckling bearing capacity under stress constraint of the structure; realizing explicit expressions of a constraint and an objective function based on a response surface method, checking the precision of fitting and updating the model; and simplifying the optimization model into a standard quadratic programming model, and then solving the model by a sequential quadratic programming method to obtain an optimal result. The present invention provides a reliable stability analysis method for the single reed structure, thereby shortening design cycle of the novel space deployable hinge, improving work efficiency and reducing design costs.

The present invention discloses a structural and mechanical model and modeling methods for human bone based on bone's hierarchical structure and on its hierarchical mechanical behavior. The model allows for the assessment of bone deformations, computation of strains and stresses due to the specific forces acting on bone during function, and contemplates forces that do or do not cause viscous effects and forces that cause either elastic or plastic bone deformation.

The invention relates to a mineshaft multiphase flow device for simulating deep-water oil and gas production. In the technical scheme, the simulation of ocean low temperature environment condition is completed by an environment temperature flowing maintaining system, wherein a liquid part of high pressure flow environment is mainly formed by the connection of a water tank, a high pressure water pump, a flow liquid temperature control system and a flow meter, a gas part is mainly formed by the connection of a gas compressor, a high pressure gas tank, a drier and a gas flow meter, and a gas-liquid mixture is completed through a bubble generator and then flows through a control valve to enter into a main mineshaft; natural gas hydrate decomposed injected gas is simulated, and flows through acontrol system and a gas injection pipeline to enter into the main mineshaft; mixed liquid enters into a gas-liquid separating tank through a backflow pipeline to complete circulation. The invention has the advantages of capability of simulating deepwater low temperature oil and gas production at 1000 meters depth of water, further researches on multiphase flow law inside the mineshaft under deepwater flow condition, and establishes a multiphase flow state mechanical model of the deepwater mineshaft and a computing method.

The invention discloses an excavating and unloading device suitable for geo-mechanical model experiment. The device comprises a cutting drill bit, a spiral drill rod, a propulsion reduction gearbox, a first step motor, a screw rod, a rotation reduction gearbox, a second step motor, a slide block, a displacement sensor, and a linear guide rail. The propulsion reduction gearbox is connected to the first step motor, the rotation reduction gearbox is connected to the second step motor, one end of the screw rod is connected to the rotation reduction gearbox, the other end of the screw rod goes through the propulsion reduction gearbox and is connected to the spiral drill rod, the other end of the spiral drill rod is connected to the cutting bit fixedly; one end of the linear guide rail is connected to the propulsion reduction gearbox, the other end of the linear guide rail is provided with the slide block, the slide block moves along the linear guide rail, the top of the slide block is fixedly connected to the bottom of the rotation reduction gearbox, and the displacement sensor is arranged on the slide block. The provided device can dynamically simulate the whole process of evacuation and unloading of chamber surrounding rock in a model experiment and is capable of precisely controlling the cross-section shape of the excavated chamber and the speed of excavation and unloading.

The invention discloses integration equipment and a detection method for evaluating coating bonding strength based on interface fracture toughness, belonging to the technical field of material surface engineering. With the equipment, a computer is used for controlling operation of four functional modules, including an ultrasonic detection module, a hardness testing module, a continuous press-in testing module and an interface crack detecting module; a man-machine interactive software system is used for processing acquisition and transmission of data of the functional modules and analysis operation and data display and output of an interface press-in mechanical model in an integrated manner; and through ultrasonic nondestructive measurement on elasticity modulus of a coating and a matrix and continuous press-in testing on a coating-matrix interface, quantitative detection on all parameters of an interface fracture toughness formula is completed in one equipment, and the critical load PC of coating-matrix interface fracture and the corresponding interface fracture toughness Kca are obtained. The equipment and the detection principle are clear, the modular design is beneficial to updating and expanding of a mechanical model library, and a detection sample is simple and convenient to prepare.

An influence component N30m of every 30 degrees in a 30 degree rotation speed N30 base as time required for 30 degree rotation of a crankshaft is calculated by using a frequency characteristic of an influence given to a rotation fluctuation of a crankshaft by output torque output from a motor, which is calculated by using a mechanical model and an amplitude P and a phase θ at a time of vibration control by the motor (S110), a determination duration T30j is calculated by subtracting an influence component T30m as an inverse number of this from 30 degree duration T30 (S120, S130), and misfire of an engine is determined by comparing the calculated determination duration T30j with a threshold value Tref (S140). Thereby, misfire of the engine outputting power to a post-stage via a damper can be determined more reliably and accurately.