416 results about "Deformation mechanism" patented technology

The invention relates to a visual natural gas hydrate sediment mechanical property testing apparatus, belonging to the field of the measurement of basic natural gas hydrate physical properties. The visual natural gas hydrate sediment mechanical property testing apparatus mainly comprises an automatic-pressing triaxial apparatus main machine, an axial loading system, a confining pressure control system, a backpressure control system, a temperature control system, a data collection system and an X-ray CT (computed tomography) imaging system. The low-temperature high-pressure hydrate triaxial apparatus is organically combined with the X-ray CT imaging system, so that the testing on macro and micro mechanical properties of natural gas hydrate sediments can be synchronously carried out. The visual natural gas hydrate sediment mechanical property testing apparatus can simulate a stress state of a real reservoir stratum, macro and micro mechanical property data of the natural gas hydrate sediments can be acquired, the important significance on disclosing a deformation mechanism of the natural gas hydrate reservoir stratum and a triggering mechanism of geological hazards such as submarine landslide caused by the decomposition of natural gas hydrate can be realized, and an important guiding function for safely and high efficiently exploiting the natural gas hydrate can be realized.

In a method of critical displacement forecast based on the deformation failure mechanism of slope, a sliding surface displacement, a calculation based on status stability factors and a slope surface displacement are determined, and applied for forecast based on a thrust-type slope deformation mechanism, a key compartment division, a relation between stress and strain mechanics properties of sliding surface of geo-material, and an analysis of evolution characteristics at different points of the sliding surface. The method provides advantages of determining deformation values at different points of a sliding surface, a slope body and a slope surface during slope failures; describing the process of a progressive failure, deformations and force changes of a slope; combining slope monitoring values to perform the stability analysis and the calculation of the magnitude of the stability factors in different deformation statuses of the slope; and assessing the durability of protective measures to the slope.

The invention discloses a construction method of an aluminium alloy material end milling-cutting force and cutting processing deformation model. According to the construction method, a milling-cutting force prediction model on the basis of an average cutting force is established; a milling-cutting force prediction model on the basis of an inclined cutting mechanism is established; on the basis of the established milling-cutting force prediction model on the basis of the average cutting force and the established milling-cutting force prediction model on the basis of the inclined cutting mechanism, single-tooth and multi-tooth transient milling-cutting force predictions are respectively carried out and obtained data is compared with testing data; an aluminum alloy material milling-cutting processing deformation model is established; on the basis of a real number encoded adaptive genetic algorithm, a flatness error of an end milled surface is predicted; the construction method has the important research significance for researching the processing deformation mechanism.

An articulated structure having a tubular inflatable casing that contains a fluid under pressure and that has a central axis along which there are defined at least one fixed-geometry segment and at least one variable-geometry segment, the arm including a deformation mechanism for deforming the variable-geometry segment, the casing and the deformation mechanism arranged so as to generate curvature of the variable-geometry segment in such a manner that the variable-geometry segment conserves a volume that is substantially constant. A robot arm including such a structure.

The invention, which belongs to the field of error compensation of a numerically-controlled machine tool, provides a modeling and compensation method of a radial thermal drift error of a spindle of ahorizontal numerically-controlled machine tool. Two thermal drift errors along the radial direction of a spindle of a umerically-controlled machine tool and corresponding key point temperatures are tested; on the basis of a thermal tilt deformation mechanism of the spindle, a thermal inclination angle of the spindle is obtained and the correlation between the thermal inclination angle and the temperature difference between the left side and the right side of a spindle box is analyzed; according to the positive or negative situation of the thermal drift errors of the tested two points and stretching or contraction situations of the left side and right side of the spindle box, a thermal deformation situation of the spindle is classified and thermal drift error models under various thermal deformation attitudes are established; the influence on the model prediction result by the structural dimension of the machine tool is analyzed; and during real-time compensation, the thermal deformation attitude of the spindle is automatically determined based on the temperatures of the key points and the spindle is compensated by selecting a corresponding thermal drift error model automatically. Therefore, the determination of the thermal deformation attitude of the spindle of the numerically-controlled machine tool is realized during the processing process; and on the basis of the thermal deformation mechanism, the radial thermal drift error of the spindle is predicted.

The invention provides a variable camber self-adaptive wing structure, the whole wing is divided into wing leading edge section, wing trailing edge section and each spanwise fixed wing structure section therebetween, wherein the The wing structure segment connected to the edge structure segment is fixed to the fuselage through the spar, and these structural segments are connected to each other by a double-fin structure. This double-fin structure allows the force between the wing structure segments to pass through the ribs. The transmission of the contact surface avoids the influence of the hinge gap of the wing deformation mechanism on the deformation, and improves the structural weight and complexity increased to meet the structural strength requirements of the wing. Use the control system of the aircraft to control and change the camber of the wing, so that the aircraft can obtain the optimal aerodynamic efficiency at different speeds and angles of attack. This adaptive wing with variable camber can greatly improve the lift. Enhancing the maneuverability of the aircraft and improving the stall characteristics can greatly improve the endurance time of the aircraft and the stability of the aircraft itself.

An infinite-level sectional reconstruction sliding sleeve device triggered by machinery or the hydraulic pressure comprises a cylinder body formed by an upper joint, a shell and a lower joint which are connected in sequence, an elastic sleeve, an inner sliding sleeve, a variable-diameter ball seat and a ball seat deformation mechanism, wherein the elastic sleeve is located in the upper joint and can selectively pass through or support the fracture ball through scaling, the inner sliding sleeve is located at the bottom of the elastic sleeve, the variable-diameter ball seat is located at the bottom of the inner sliding sleeve and supports or releases the fracture ball through elastic claws, and the ball seat deformation mechanism is connected with the variable-diameter ball seat and drives the variable-diameter ball seat to realize mutual transformation between an open-type ball seat and a closed-type ball seat. Through the arrangement of the elastic sleeve and the variable-diameter ball seat and the improvement of the surrounding components, a multi-level sliding sleeve can be opened by adoption of a low-density fracture ball with the same dimension in a full-pore mode, the fine reconstruction of the reservoir can be realized, and a barrier-free passage can be provided for later workover treatment.

The invention provides a testing apparatus used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism. The testing apparatus is used for solving a problem of lack of experiment equipment, which is used for simulating foundation pit three-dimensional seepage caused by combined effects of separating-lowering-pouring and ground deformation mechanism, and systematic researches on relating data and mechanism at present. The testing apparatus comprises a model casing, geotextile, permeable steel plates, underground diaphragm walls, a pumping well, a recharge well, measuring devices and data collecting devices. The model casing is divided into a water zone, a soil zone and a foundation pit zone; the measuring devices comprise a flowmeter, a stratum displacement meter, a water manometer, a contact electric displacement meter, a pore water pressure gauge, and the like, and is capable of realizing accurate measurement on flow displacement pressure; and the data collecting devices are connected with the measuring devices. The testing apparatus is capable of realizing researches on the mechanism of pumping depression cone and recharge lifting underground water level three-dimensional seepage effects, and the relationship between ground deformation and groundwater table fluctuation.

The invention relates to a deformable planet wheel robot with a left body and a right body hinged. The deformable planet wheel robot is characterized by comprising the left body and the right body which are connected into a whole through a rocker arm suspension system hinged to the two bodies. The outer side of each of the bodies is provided with vertically-hinged lateral plates, namely a lateral plate I, a lateral plate II, a lateral plate III and a lateral plate IV. Front wheels are fixed on the lateral plates I, and rear wheels are fixed on the laterals IV. The middle portions of the lateral plates I and the lateral plates II are hinged to a front steering frame and a rear steering frame. Pairs of ball screw are arranged at the upper portion and the lower portion in each of the bodies fixedly, and the hinge positions of the lateral plates I and the lateral plates II and the hinge positions of the lateral plates III and the lateral plates IV are connected with respective ball screws through connection rods. The lateral plates I, the lateral plates II, the front steering frame and connection rods form four-rod deformation mechanisms. The deformable planet wheel robot are provided with four groups of symmetrically-arranged four-rod deformation mechanisms which serve as the chassis of the deformable planet wheel robot.

The invention relates to a testing apparatus for simulating a deep-displacement-initiated strata deformation coordination mechanism. The testing apparatus comprises a model box, a strata similar material, a molding fixed boundary mold, an air bag and measuring equipment. The model box is a main carrier of a model test; the strata similar material is used for simulating actual strata and combinations thereof; the molding fixed boundary mold is used for simulating the deep displacement boundary conditions of strata and can achieve the purpose of simulating different displacement boundary conditions through replacing molds with different shapes and parameters; the air bag is combined with the fixed boundary mold and is used for simulating the deep displacement of the strata and can preciselycontrol the air pressure in the air bag through an air valve to achieve the purpose of controlling displacement boundary parameters; and the measuring equipment achieves the precise measurement of a stratified displacement, a surface displacement, a soil pressure, a pore water pressure and the like. The testing apparatus for simulating the deep-displacement-initiated strata deformation coordination mechanism can be used for indoors simulating the influence of an underground deep continuous deformation process on an overlying strata deformation mechanism.

The invention relates to a wind tunnel model folding deformation wing which is mainly used for measuring the pneumatic force of deformable aircraft in the wind tunnel dynamic test; traditional whole wing is divided into parts: a wing body, an internal wing, an external wing and the like; the wing body, the internal wing, the external wing, a connecting rod and a hinge shaft are coupled together with a driving mechanism and a driven mechanism controlled by a precise mechanical device; two mutually parallel longitudinal hinge shafts are arranged at the joint between the internal wing and the wing body and between the internal wing and the external wing; the hinge shaft of the internal wing and the wing body is a fixed shaft; the hinge shaft of the internal wing and the external wing is a driven shaft; the driving mechanism drives the internal wing to rotate correspondingly to the fixed shaft and drives the driven mechanism at the same time, thus leading the driven shaft to rotate correspondingly to the fixed shaft; the external wing arc plane always keeps a state parallel to the horizontal plane during the deformation running process of the wing. The wing folding deformation mechanism runs smartly and stably without noise, excellently bears the pneumatic force and pneumatic moment of the model, and realizes the digital control during the folding process, with precise positioning of the folding angle.

The invention discloses a transformable three-finger dexterous hand. The transformable three-finger dexterous hand comprises a deformation mechanism, underactuation fingers and a controller, the underactuation fingers are fixedly connected with the deformation mechanism, the controller is electrically connected with the deformation mechanism and the underactuation fingers, a plurality of gear setsare arranged in the deformation mechanism and drive the underactuation fingers to move, the underactuation fingers are provided with double parallelogram mechanisms for connecting finger tips with finger bases. The deformation mechanism composed of the multiple gear sets, the underactuation fingers connected through the double parallelogram mechanisms and the controller, the three-finger dexterous hand having multiple degrees of freedom, being simple to control and transformable, and being suitable for multiple grabbing pieces is formed.

The invention discloses a testing device and method for simulating shield tunnel excavation of a karst region. The testing device comprises a testing box, a shield excavation device, a supporting frame and a measurement system, wherein the supporting frame is connected with the testing box through a bottom plate; holes are pre-formed in two opposite wall surfaces of the testing box; the shield excavation device comprises a cutterhead, a shield machine body, a fixed motor and an outer pipe; the supporting frame comprises a counter-force support, a worktable and a thread steel column; the measurement system comprises a sedimentation rod, a displacement sensor and a pressure box. According to the testing device and method, disclosed by the invention, the problems in actual engineering that the monitoring work is difficult and measurement projects are not comprehensive are solved. More data foundations are provided for establishing mechanical models for tunnel excavation under different working conditions, and comprehensively researching influences of the shield tunnel excavation of the karst region on a soil body and a surrounding soil body deformation mechanism. A test design is carried out based on a similarity principle so that an obtained testing result has certain reference meaning on predication of actual surrounding soil body deformation of the karst region and stratum displacement.

The glass substrate optical reading infrared sensor features in the light through but infrared blocked glass substrate, side support flat beam unit with two sets of thermal deformation mechanism at both sides of the infrared absorbing plate, baffling distributed through the heat insulation beam and thermal deformation beam. The thermal deformation mechanism connected to both sides of the infrared absorbing plate with its inner side, with the outside end beam fixed on the glass substrate through the anchor erect. The heat insulation beam is nonmetallic film, the heat deformation beam is dual material beam formed on the nonmetallic film coated on the metal film, infrared absorbing plate having its reflective surface facing the glass substrate, visible light passing through the glass substrate projected on the reflective surface, with the infrared light directly projecting on the other side. It eliminates the frame structure, alleviates the dimensional conflict on the same flat layer due to the heat deformation mechanism and the infrared absorbing plate, effectively improving the super infrared detection sensitivity.

The invention relates to a scanning electron microscope nanometer line original tensile device and method. It controls the heater to make the dual metal plate bending, drive slide of dual metal plate moving linearly along the track to both sides, tensile the nanometer line fastened on the sample bench, recording the tensile acted plastic tensile deformation and fracture failure, matching the dynamic performance of the nanometer line and the microstructure change, revealing the tensile deformation mechanism, fracture failure mode, brittle-ductile transition and so on of one dimension nanometer dynamic performance. It is simple, easy to control, realizing the original position one line measurement of the nanometer line dynamic feature.

The invention provides a test device and method for simulating ground access type shield tunnel excavation, and the test device comprises a model test groove, a shield segment model, a tunnel excavation device, a transmission system, an adjustable support system, a starting pedestal, a synchronous grouting system, and a monitoring quantity control system. The tunnel excavation device is composed of a steel sleeve with a cutting edge at the front end, a rotary cutting tool and a steel partition plate, and the adjustable support system comprises a counterfort type support, a steel truss base, anL-shaped rotating plate, a rotating shaft and a jack. The ground access type shield tunnel excavation process with a certain slope rate is simulated through the synergistic effect of the adjustable support system and the transmission system in combination with a simple tunnel excavation device for the first time and is closer to engineering practice, test working condition combinations of different excavation slopes and grouting amounts are set, the segment structure mechanical property, the soil body stress release rule and the stratum deformation mechanism of the ground access type shield tunnel are studied, and design and construction guiding can be realized.

The invention discloses an airphibious four-rotor aircraft. The airphibious four-rotor aircraft comprises four execution mechanisms and a driving deformation mechanism. The driving deformation mechanism comprises a driving motor, two driving shafts and two driven shafts. The driving shafts and the driven shafts are arranged on supporting seats, and the driving motor is provided with two motor output shafts; each motor output shaft is connected with the corresponding driving shaft through a coupler, and each driving shaft is connected with the corresponding driven shaft through a gear pair; and rotor supports of two execution mechanisms are connected with the two driving shafts respectively, and rotor supports of the other two execution mechanisms are connected with the two driven shafts respectively. Air-land double purposes of the four-rotor aircraft can be conveniently and rapidly achieved, and when the road is flat, the airphibious four-rotor aircraft can serve as a robot trolley to walk; when obstacles occur, the robot trolley can be transformed to the four-rotor aircraft to fly over the obstacles; and the two manners are switched for walking, energy consumption can be saved, and the cruising power of the aircraft can be improved.

The invention relates to a secure bearing ball feeding system which feeds balls from bottom to top. The system comprises a ball feeding preparation mechanism, a ball pushing-in mechanism, an outer ring pressure deformation mechanism and an inner ring centralizing and sheathing mechanism; wherein the ball feeding preparation mechanism and the ball pushing-in mechanism are arranged at the bottom of the bearing ball feeding system, and the outer ring pressure deformation mechanism and the inner ring centralizing and sheathing mechanism are horizontally arranged above the ball feeding preparation mechanism and the ball pushing-in mechanism. Due to the adoption of the work mode of feeding the balls from bottom to top, the entry, push-in-place and installation are carried out under the condition that the balls are completely controlled, the mutual collision of balls in the ball feeding process and the mutual excessive fraction in the shift process are reduced at utmost, thus being beneficial to guaranteeing the secure move of the balls and the surface smoothness of the balls as well as the assembly quality of the bearing products and the service life of the products, and having strong practicability.

The invention discloses a loess landslide type and sliding mode analysis method based on the insar multi-dimensional deformation information. The method comprises the following steps: 1, acquiring a filtered insar differential interference diagram through data acquired by t SAR sensors; 2, carrying out phase unwrapping on the filtered insar differential interference diagram, geocoding and samplingto the same coordinate grid and spatial resolution; 3, unwrapping an interference pattern under a geographic coordinate system, calculating a multi-dimensional surface deformation rate and acquiringa multi-dimensional surface deformation time sequence; 4, based on the multi-dimensional surface deformation rate and the multi-dimensional deformation time sequence, carrying out the landslide deformation mechanism analysis and determining the type and the sliding mode of the landslide through combining remote sensing images with a topographic map. According to the method, the insar technology isadopted for loess landslide type and sliding mode analysis, wherein only SAR images, remote sensing images and the topographic map of a research area are required. Therefore, the method is high in efficiency and accuracy. The workload of the outdoor operation is greatly reduced. The method is suitable for the landslide research in the dangerous area, and provides an important technical support for the landslide disaster prevention and reduction of the loess landslide.

The invention relates to a damper with vibration energy dissipated through a soft steel surface internal yield deformation mechanism. The damper is used for energy dissipation and vibration reduction of a house building. An assembly type soft steel damper optimized through an equal-stress line comprises a soft steel energy dissipation piece, an anti-buckling clamping plate, L-shaped connecting plates, anchoring steel plates, a polyfluortetraethylene plate, pre-pressing fastening bolts, friction type high-strength connecting bolts, a limiting bolt, embedded anchoring steel bars and flexible filling materials. The assembly type soft steel damper optimized through the equal-stress line can serve as a dividing element of a building to be installed in a structure and does not bear a vertical load; when the assembly type soft steel damper bears a wind load or an earthquake load, the elastic-plastic hysteretic behavior generated when the soft steel energy dissipation piece deforms dissipates the energy input by the wind load or the earthquake load, and thus main components of the structure are protected; the soft steel energy dissipation piece is optimized through the equal-stress line, so that accumulated plastic deformation of the energy dissipation piece is greatly reduced, and the low cycle fatigue performance of the energy dissipation piece is enhanced.

The invention provides a hydrate sediment CT triaxial testing device, and belongs to the technical field of geotechnical engineering foundation physical property measurement. Aiming at the deficiencyof the invention of a visualization testing device for natural gas hydrate sediment mechanical properties, the hydrate sediment CT triaxial testing device is subjected to redesigning and optimization,under the premise that the hydrate reservoir static force, the dynamic properties and the creep property can be obtained, the stability in the scanning rotating process of a triaxial apparatus, the hydrate sample temperature control accuracy and the penetrating property of X-rays of a triaxial apparatus pressure chamber are improved, the optimal CT imaging effect is obtained, and powerful hardware support is provided for the verification of the reservoir deformation mechanism in the decomposition process of a hydrate.