283 results about "Shearing deformation" patented technology

The invention provides a shield tunnel construction period segment longitudinal dynamic floating prediction method, and relates to the field of shield tunnel segment floating prediction.The method comprises the steps that the static upward floating force and the dynamic upward floating force of a shield tunnel are calculated by considering the timeliness of slurry, and the characteristic of nonlinear change of the rigidity of a circular seam connector is considered; the method comprises the following steps: dividing bending-resistant and shearing-resistant deformation modes of a circular seam joint, further deducing bending rigidity and shearing rigidity of a tenon-type joint in each deformation stage, deducing a shield tail segment longitudinal floating prediction model of the circular seam joint in the shield tunnel construction period, and constructing a nonlinear iterative algorithm of shield tunnel longitudinal deformation according to the theories; and acquiring parameter data of actual engineering, and inputting the parameter data into the duct piece floating prediction model to obtain a duct piece floating value. By means of the method, accurate prediction of floating deformation of the shield tail segment in large shield tunneling can be achieved, an effective scientific basis is provided for large-diameter shield tunneling construction, the problems that parameter decision of shield tunneling machine operators is difficult, and the segment floating control effect is poor are solved, and structural diseases caused by too large floating of the shield tail segment are eliminated.

The invention relates to the technical field of machine learning, in particular to a rock and soil stability prediction method and system based on machine learning, and the method comprises the following steps: extracting shear stress, displacement and energy dissipation rate time series data, calculating the stress change rate of adjacent time steps, screening the stress increment sudden change period, and calculating the shear deformation gradient change rate. Mutation points in the strain direction are screened, and a key variable interval is obtained. According to the method, traditional analysis limitation is broken through by combining displacement-stress second derivative and energy dissipation rate cross validation, a hardening-softening conversion area is dynamically identified, multi-stage strain gradient differences are compared to establish a space-time correlation parameter system, and static and dynamic parameter conversion is realized by using a strain increment space gradient tracking technology; and quantitative mechanical interaction and energy dissipation collaborative analysis is carried out to describe a stress diffusion path, stress release characteristics and deformation gradient distribution are fused to construct a fracture principal direction multi-dimensional verification mechanism, and a microscopic fracture and macroscopic instability correlation model is established.

The invention relates to the technical field of engineering design, in particular to a truss-web type steel-concrete composite beam deflection calculation method and system.The method comprises the steps that a mechanical simplified model of a truss-web type steel-concrete composite beam is built, calculation assumption is determined, and a calculation scheme is obtained; determining the acting mode of the external load on the composite beam; basic calculation parameters of the combined beam mechanical simplified model are determined; according to the action mode, calculating a rigidity reduction coefficient of the simply supported beam caused by shear deformation of a truss web member, a slippage effect of a steel-concrete connection interface and local deformation of a node under the action of different loads; calculating the equivalent flexural rigidity of the truss-web type composite beam; and calculating the deflection of the truss-web type steel-concrete composite beam under the action of different loads. By means of the method, the problem that an existing calculation method is poor in pertinence and applicability is effectively solved, so that the stress condition of the truss web type steel-concrete composite beam structure is correctly reflected; according to the method, multiple influences caused by discontinuity of the truss web members, including shear deformation of the truss web members, a slippage effect of a steel-concrete connection interface and additional deflection caused by local deformation of the nodes, are considered, and the midspan deflection of the truss-web type steel-concrete combined simply supported beam can be conveniently evaluated.

The invention relates to the technical field of hydrofracture simulation experiments, in particular to a true triaxial hydrofracture fault slippage casing deformation monitoring method and system, and the method comprises the steps: preparing a target reservoir simulation sample; arranging and installing a shaft and a sensor; carrying out a water pressure physical model experiment and recording experiment data; and analyzing and processing the experimental data, and performing quantitative evaluation by combining the final state of the target reservoir simulation sample. According to the method, the shear deformation influence of fault slippage on the shaft casing under the true triaxial hydraulic fracturing condition can be quantitatively evaluated; scientific basis is provided for optimization of fracturing optimization design parameters, and engineering practical significance is achieved for optimization of the horizontal well casing damage prevention and control theory and on-site construction design.

The invention belongs to the technical field of direct shear-seepage tests of rock joints, and discloses a numerical test method for direct shear-seepage of rock joints under different boundary conditions, which comprises the following steps of: establishing a joint surface numerical model by using finite element software, and performing tests for simulating joint shear mechanical behaviors by applying different boundary conditions. And the contact state and the opening distribution of the joint surface under different shear displacements are obtained, so that the shear stress evolution mechanism of the joint surface is better revealed, and the mechanical behavior of the rough joint surface in the shear process is accurately expressed. According to the method, the evolution law of mechanical properties in the joint shearing process can be reflected, the influence of shearing deformation on the joint seepage characteristics can be reflected, joint opening data distribution is imported into programming software to be processed, a joint seepage numerical model is constructed, then multi-physics field simulation analysis software is imported, and the joint seepage performance is improved. The flow velocity, the osmotic pressure and the streamline distribution characteristics in the flowing process are calculated, so that the joint permeability characteristics are analyzed.

The invention relates to the technical field of rubber material performance detection, in particular to a dynamic test platform and method for evaluating the bonding effect and fatigue life of rubber and a rubber cord fabric. The dynamic test platform comprises a driving mechanism, a test platform, a clamping mechanism, a monitoring system, a data acquisition module, a control system and a data analysis module. The driving mechanism can adjust the frequency, the displacement amplitude and the acceleration of loading deformation; the test platform supports normal loading pressure to realize simulation of different load working conditions; the clamping mechanism is a two-way adjustable clamp, and free displacement is achieved through a sliding rail mechanism; the monitoring system integrates a force sensor, a displacement sensor and a temperature sensor. The data acquisition module records loading process data; the control system sets parameters through a touch interface and monitors the test in real time; and the data analysis module generates an adhesion performance, fatigue life and damage form evaluation report based on an algorithm. The device can accurately reproduce the adhesive property change under the dynamic working condition, comprehensively analyzes the adhesive strength and fatigue life, provides a scientific basis for research and development and quality control of rubber products, and is suitable for testing the adhesive property of composite materials such as tires and transmission belts.

The invention discloses a solving method for a micro-vibration transmission model of a flexible cable of a spatial magnetic suspension vibration isolator, and relates to the technical field of spatial vibration isolation. The method comprises the following steps: establishing a spatial magnetic suspension vibration isolator flexible cable micro-vibration transmission model based on central line telescopic deformation and cross section shear deformation; constructing a partial differential equation solving model based on the physical information neural network; constructing a loss function of a partial differential equation solving model by using the residual error, the residual error gradient, the initial condition and the boundary condition of the partial differential equation so as to train the partial differential equation solving model, and performing offline storage on the trained model; and then solving the micro-vibration transmission model of the flexible cable of the spatial magnetic suspension vibration isolator to obtain a solving result. According to the method, the accuracy of the flexible cable micro-vibration transmission model in the construction and solving process can be improved, support is provided for the design of vibration isolation compensation control, and then the problem of dynamic disturbance introduced by the flexible cable in a space magnetic suspension vibration isolation system is solved.

An internal and external coupling shear resistance locking control system and monitoring method of tunnel surrounding rocks, comprises an internal shear resistance and monitoring system of tunnel surrounding rocks, an external shear resistance and monitoring system of tunnel surrounding rocks, a relative shear displacement monitoring system of the tunnel walls and the roof and floor layers, and an anchor agent installation system; holes are expanded in the anchor cable drilling holes passing through coal-rock interface areas of the coal walls and roof and floor rock layers to form shear misalignment tolerance cavities; monitoring pressure values of measuring bags and liquid discharge in the shear misalignment tolerance cavities to determine shear deformations of the shear misalignment tolerance cavities, monitoring forces on anchor cables, compensating pull rods and shear resistance steel strips, and adjusting the shear resistance of the anchor cable and steel belt through the compensation rod structure.

The invention relates to the technical field of deformation prediction, in particular to a rock high slope excavation anchoring deformation prediction method based on artificial intelligence, and the method comprises the following steps: obtaining multi-source image data, analyzing rock volume and gravity center transfer, extracting a corresponding relation between abnormal stress and displacement, constructing a structure offset path, and screening continuous abnormal features. And extracting a key deformation rate interval to obtain an anchoring deformation trend prediction result. According to the method, the position of an unbalanced section is judged by constructing a gravity center transfer track and a mass difference space sequence and combining a coupling relation between a stress abnormal point and a displacement response direction, a collaborative evolution section of a structure offset path and a stress boundary is extracted, and a continuous abnormal zone is screened according to a crack change and joint fluctuation trend. A key change interval is extracted in combination with the time feature of the shear deformation rate, dynamic judgment of a structural deformation path and an extension direction is completed, and the spatial continuity recognition capability and the time response resolution are enhanced.

The invention provides a prediction method for critical vibration speed of a six-high cold rolling mill based on a three-dimensional model. The critical vibration speed is predicted based on a three-dimensional six-high cold rolling mill model, under the consideration that the rolls shall be considered as short and thick beams and influence of shear deformation needs to be considered, Timoshenko beams are selected, and besides, Hermite interpolation is used for node displacement vectors; a vertical vibration dynamic equation of the mill-strip system can be established by stress analysis among the strip, rolls and mill housing; solving is performed by the Newmark-Beta method, a displacement response curve of the rolls at a specific speed can be obtained, and if the amplitude of displacement response curve is constant, the speed is the critical vibration speed of the six-high rolling mill.

The invention belongs to the technical field of underground engineering supporting, and particularly discloses a shear-resistant variable-resistance yielding anchor rod capable of measuring pretightening force and a using method thereof.The shear-resistant variable-resistance yielding anchor rod is provided with an anchor rod body, the anchor rod body comprises a head section, a middle standard section and a tail section which are sequentially connected, the head section comprises a head end rod body, the head end rod body is provided with a piston head, and the piston head is sleeved with a sleeve; the sleeve and the piston head form a piston structure. A piston cylinder structure is arranged on the middle standard section and is used for adapting to shear deformation caused by dislocation and slippage deformation of a rock stratum. The tail section comprises a first rod body and a second rod body, the tail end of the second rod body is arranged in the first rod body in a penetrating mode along the rod length of the first rod body, connected with the elastic piece and capable of sliding in the rod length direction of the first rod body, and the tail end of the second rod body is provided with an outer extension and capable of feeding back deformation of the elastic piece. The problem that a common anchor rod cannot meet the requirement for large deformation of surrounding rock is solved, the problem that an existing anchor rod is prone to being cut off under transverse displacement of a rock stratum is solved, and meanwhile the pretightening force can be measured.

The invention belongs to the technical field of mechanical simulation and prediction of woven fabrics, and particularly discloses a modeling method and system of a hyperelastic model for simulating wrinkles of a two-dimensional woven fabric, and the method comprises the steps: building the hyperelastic model which comprehensively considers mechanical behaviors of the two-dimensional woven fabric, and the two-dimensional woven fabric is formed by overlapping and weaving warp yarns and weft yarns; determining a numerical value implementation method of the hyperelastic model in the finite element framework, wherein the numerical value implementation method is implemented through a subprogram interface; simulating a wrinkle defect generated in the deformation process of the two-dimensional woven fabric by adopting a finite element framework through a numerical value implementation method of the hyperelastic model; wherein the hyperelastic model is established by defining strain invariants of tensile deformation, shear deformation and bending deformation of the two-dimensional woven fabric, obtaining a corresponding strain energy function based on the strain invariants, and calculating membrane stress and bending moment based on the strain energy function. According to the invention, the wrinkle defect generated in the deformation process of the two-dimensional woven fabric can be accurately simulated.

The invention discloses a test method suitable for simulation loading of a cross-creeping fault tunnel, and aims to solve the problem that most of existing indoor simulation loading devices for the cross-creeping fault tunnel are mainly based on a stick-slip fault and can only be used for test research on the aspects of damage mechanism and prevention and control of a tunnel structure caused by the stick-slip fault. The invention aims at carrying out research on the interaction mechanism between the creep fault and the tunnel structure, catastrophe prevention and control and monitoring and early warning through indoor test simulation. Free contraction and shear deformation of the fixed model box and the movable model box are achieved through the spring and the telescopic connecting belt, and shear dislocation simulation of the creep fault crossing tunnel is achieved. And dislocation loading of the movable model box can be realized through a second jack and a third jack which can move freely.

The invention discloses a variable stiffness pipe and a continuum robot variable stiffness module, and relates to the technical field of continuum robotics.The variable stiffness pipe comprises a flexible inner pipe and a flexible outer pipe arranged outside the flexible inner pipe in a sleeving mode, and a phase change material and a flexible heat exchange device are arranged between the flexible inner pipe and the flexible outer pipe; the heat exchange device can exchange heat with the phase-change material and enable the phase-change material to be changed from a solid phase to a liquid phase, a flexible pipe is further arranged in the filling space, a plurality of hollow groove sets are formed in the pipe wall of the flexible pipe in a penetrating mode, the hollow grooves are filled with the phase-change material, the flexible pipe can be freely bent when the phase-change material is in the liquid phase, and the flexible pipe can be bent when the phase-change material is in the solid phase. According to the variable-stiffness continuum robot, the shear modulus resisting shear deformation under the shear stress is converted into the compression modulus resisting compression deformation under the compression stress, the stiffness of the variable-stiffness pipe can be improved, the variable-stiffness continuum robot comprises the variable-stiffness pipe and a control mechanism, and the variable-stiffness continuum robot can be controlled by controlling the stiffness of the variable-stiffness pipe to change. And the motion control module is matched to move towards the target position and control the surgical tool.

The invention belongs to the field of tunnel engineering, and relates to a tunnel nested pipe protection structure with anti-seepage and anti-shear capacities, which comprises a main body tunnel, an external pipe body and a flexible embedded tunnel, the outer pipe body is located between the two main body tunnels, and the outer pipe body and the main body tunnels are of an integrated structure. The flexible embedded tunnel is located in the outer pipe body, and the two ends of the flexible embedded tunnel are connected with the ends of the two main body tunnels through flexible joints correspondingly. A dislocation buffer area is formed between the outer wall of the flexible embedded tunnel and the inner wall of the outer pipe body; a plurality of flexible supporting structures are symmetrically arranged in the dislocation buffering area. By constructing an external tubular space, a nested structure is formed, and dislocation allowance is provided for an internal flexible pipeline; the anti-seepage capacity of the inner pipe is effectively improved through the waterproof barrier and the filling material of the outer pipe; when shear dislocation occurs in the ground layer, shear deformation is dispersed on the flexible embedded tunnel, and the situation that the internal tunnel directly bears large shear force is avoided.

The invention aims to provide a device and a method for preparing a fine-grain magnesium alloy pipe, and belongs to the technical field of light metal plastic forming. Differential torsion and continuous shear deformation are generated in the machining process of a magnesium alloy pipe blank, grain refinement and texture weakening are achieved while the torsion direction of the blank is not changed, and the yield of the fine-grain magnesium alloy pipe is improved. Room-temperature mechanical properties of magnesium alloy pipes are improved, and the magnesium alloy application range is widened. By means of the method, the grain refining effect of the magnesium alloy pipe is more remarkable, the basal texture is weakened to a large extent, the obtained fine-grain magnesium alloy pipe is uniform in structure, and the obdurability is greatly improved.

The self-adaptive staged energy consumption friction-shear yield composite damper comprises a friction energy consumption unit, an inner friction plate, an outer friction plate, at least two shear energy consumption units and an H-shaped steel plate, wherein the inner friction plate and the outer friction plate are located on the friction energy consumption unit, and the H-shaped steel plate is located at the tail end of the friction energy consumption unit and used for fixing the friction energy consumption unit. The prestressed bolt sequentially penetrates through the inner friction plate and the outer friction plate on the friction energy dissipation unit and the shear energy dissipation unit and is connected with the inner friction plate and the outer friction plate on the friction energy dissipation unit and the shear energy dissipation unit through at least one pair of linkage rods, and the two ends of the friction energy dissipation unit are connected to beam-column joints respectively. The linkage rod does not make contact with a linkage rod penetrating hole of the shearing energy dissipation unit during displacement, and only the friction energy dissipation unit works; and the linkage rods make contact with the linkage rod penetrating holes in a displacement mode, the shear energy dissipation devices are fixed, the shear plates are subjected to shear deformation, and the earthquake displacement response of the structure is effectively reduced through staged energy dissipation and the displacement amplification effect.

The invention relates to a device for measuring deformation of components and nodes in a historic building wood structure, in particular to a system for measuring deformation between historic building wood components, which comprises a bracket set interlayer slippage measuring device, a column base node embedding-slippage measuring device and a mortise and tenon joint embedding-tenon pulling amount measuring device. The measuring system is mainly composed of three deformation quantity measuring devices suitable for different positions. The deformation quantity measuring devices comprise a tilt angle sensor, a small displacement sensor and a small displacement combination sensor. Measurement data are mainly collected through a static strain gauge and are simultaneously input into a computer terminal for real-time recording, data of corresponding sensors are integrated after export, and the deformation quantity required at each position is calculated. According to the invention, a set of complete measurement system suitable for horizontal and vertical relative deformation between historic building wood components is formed, and the problem that the relative deformation state between local components is difficult and inaccurate to obtain when the horizontal shear deformation of a structure is researched in the past is solved.

The invention discloses a method and a system for predicting the axial pressure stable bearing capacity of a trussed column by considering the influence of initial stress and creep, belongs to the technical field of trussed mixed structures, and solves the problem of low precision of predicting the axial pressure stable bearing capacity of the trussed column due to the fact that the influence of initial stress and creep is not considered. The method comprises the steps of determining basic parameters, considering the influence of shear deformation of the trussed column on initial stress, considering the influence of shear deformation of the trussed column on creep, calculating a stability coefficient, calculating the stable bearing capacity of the trussed column and the like. According to the model, an equilibrium differential equation is established based on the mechanics principle, mathematical calculation and derivation are carried out by applying the stability theory, and the influence of shear deformation, initial stress and creep on the axial pressure stable bearing capacity of the truss type column is comprehensively considered, so that the stable bearing capacity prediction method of the truss type column is provided. The method is suitable for predicting the axial pressure stable bearing capacity influenced by the initial stress and creep of the trussed column.

The invention belongs to the technical field of mechanical simulation and prediction of woven fabrics, and particularly discloses a modeling method and system for simulating wrinkles of a multi-layer woven fabric, and the method comprises the steps: building a numerical model considering the characteristics of the multi-layer woven fabric, and enabling the multi-layer woven fabric to be formed by stacking single-layer woven fabrics according to a target layering sequence; determining a numerical value implementation method of the numerical value model in the finite element framework, wherein the numerical value implementation method is implemented through a subprogram interface; simulating the wrinkle defect generated in the deformation process of the two-dimensional woven fabric by adopting the finite element framework according to the numerical model through the numerical implementation method; wherein the numerical model is established by simulating tensile deformation, shear deformation and bending deformation of a single-layer fabric through shell units of the multi-layer woven fabric and indirectly simulating compression deformation and interlayer slippage behaviors through contact interaction among the shell units. According to the invention, the accuracy of wrinkle defect simulation of the multi-layer woven fabric can be improved.

The invention discloses a method for calculating the natural vibration frequency of a steel-concrete composite beam under common boundary conditions, and relates to the technical field of high-speed railway bridge construction. The method comprises the steps that material parameters and the cross sectional area of the steel-concrete composite beam are obtained; calculating a dimensionless coefficient according to material parameters and section parameters of the steel-concrete composite beam; according to the dimensionless coefficient, the first frequency reduction coefficient, the bending resistance combination connection coefficient, the second frequency reduction coefficient and the third frequency reduction coefficient; and calculating the natural vibration frequency of the single-span steel-concrete composite beam under the common boundary condition according to the three frequency reduction coefficient calculation expressions. According to the method, the shear deformation influence is considered, the frequency approximate value of the single-span steel-concrete composite beam under any boundary condition can be calculated, the calculation precision is high, and the method is also suitable for other partially-interacted composite beams formed by connecting two different materials through flexible shear connectors.

The anchor rod comprises a free-section rod body, a flexible large-deformation-section rod body and an anchoring-section rod body which are sequentially connected end to end, an anchor head is fixedly arranged on the free-section rod body, and the anchoring-section rod body is used for being fixed in a stable bed rock, so that the end of the anchor rod is fixed; the free section rod body is used for being fixed in a sliding rock mass in a penetrating mode, the flexible large-deformation section rod body is arranged at a shear deformation zone between the sliding rock mass and a stable bed rock, and the flexible large-deformation section rod body is connected with the free section rod body and the anchoring section rod body through limiting tension type hydraulic jacks at the two ends of the flexible large-deformation section rod body. The limited tension type hydraulic jack senses the pressure of hydraulic oil through a pressure sensing valve arranged on the limited tension type hydraulic jack, and a limited pressure value is set. Tension force and shear force can be borne through deformation of the flexible large-deformation section rod body, the performance of the anchor rod is effectively improved, and the tension type hydraulic jack can be limited to ensure that the tension borne by the anchor rod is constant.

The invention relates to the technical field of plastic processing of thin-wall parts, and discloses an integral forming method of an inverted L-shaped rib cylindrical part, which comprises the following steps of: firstly, performing shearing and spinning on a cylindrical part blank, and performing gradient heating on a rib part formed by shearing to prepare an approximately inverted L-shaped rib cylindrical part; and then axial shaping is conducted on the inverted L-shaped rib through a flat spinning wheel, and finally the inverted L-shaped rib cylindrical part is obtained. According to the overall forming method of the inverted-L-shaped rib cylindrical part, the rib height can be remarkably increased, cracking is restrained, technological parameters are convenient to adjust, and then the shape and size of the inverted-L-shaped rib cylindrical part are adjusted and controlled. By means of local loading of the two spinning rollers, the material is in the deformation state with the main shear deformation mode and the auxiliary upset-extrusion deformation mode, the rib height limit is remarkably improved, through introduction of a thermal field, dislocation rearrangement and polygon can happen to the structure through the dynamic recovery effect, the deformation resistance is reduced, and then rib cracking is prevented.

The invention relates to a fault slippage shear casing deformation simulation and evaluation device in a hydraulic fracturing process. The fault slippage shear casing deformation simulation and evaluation device comprises a shaft simulation system, a fluid circulation system, a heating system, a displacement load applying system and a measuring system, the shaft simulation system comprises a sleeve and an outer frame arranged on the periphery of the sleeve, and cement is poured into the outer frame on the periphery of the sleeve to form a simulation stratum; the fluid circulating system comprises a liquid storage tank, pressure regulating valves and a water pump, the liquid storage tank, the water pump and the sleeve are connected through a circulating pipeline, and the pressure regulating valves are arranged at the two ends of the sleeve respectively; the displacement load applying system comprises a fixing mechanism, a moving mechanism and a hydraulic cylinder, and is used for pushing a fault of a simulated stratum to slide along a weak plane so as to apply shear deformation to a sleeve; the measuring system is used for capturing fault slippage parameters and shear deformation parameters of the casing pipe. The monitoring and the evaluation on the shear deformation of the horizontal casing under the stratum caused by various factors in the hydraulic fracturing process are realized in a real working condition environment.

The utility model discloses a graded energy consumption type seismic mitigation and isolation support, and relates to the technical field of seismic mitigation and isolation supports. The rubber support is connected to the bottom of the spherical support; the bottom basin assembly comprises a bottom plate and supporting stoppers, the supporting stoppers are fixed to the periphery of the bottom plate, the ends, away from the spherical support, of the rubber supports are connected with the bottom plate, the rubber supports are located in the supporting stoppers, and threaded holes are formed in the ends, away from the bottom plate, of the supporting stoppers; and the limiting stop block is fixed in the threaded hole in the supporting stop piece through the anti-shear pin, and the inner edge of the limiting stop block protrudes out of the inner side of the supporting stop piece and is used for limiting the spherical support. The graded energy dissipation function is achieved, when a bridge and a building structure normally operate, the spherical support horizontally moves and turns, and friction energy dissipation of the spherical support is mainly achieved; under the action of an earthquake, the rubber support is subjected to shear deformation, and the spherical support and the rubber support are combined to consume energy.

The waveguide polyurethane laminated shock insulation support comprises an upper connecting plate, a lower connecting plate and a shock absorption body arranged between the upper connecting plate and the lower connecting plate, the upper end face of the shock absorption body is fixed to the bottom face of the upper connecting plate through an upper pressure-bearing wear-resisting layer, and the lower end face of the shock absorption body is fixed to the upper end face of the lower connecting plate through a lower pressure-bearing wear-resisting layer; the damping main body comprises a plurality of multi-layer corrugated steel plates which are distributed up and down and polyurethane elastomers which wrap the multi-layer corrugated steel plates and are alternately vulcanized and tightly attached into a whole. The internal structure of the shock insulation support is optimized, energy is absorbed through waveform deformation during shear deformation, transverse expansion deformation of the polyurethane elastomer is limited under vertical load, the contact area with the polyurethane elastomer is increased, friction force is increased, the energy dissipation capacity is enhanced, and the service life of the shock insulation support is prolonged. The problem that a steel plate and polyurethane are separated or relatively slide due to insufficient binding force of a traditional shock insulation support is solved, the interlayer peeling strength is improved, and the vertical bearing capacity of the support is improved.

The invention discloses a method for calculating the lateral deformation of a ground-connected wall using a third-order shear deformation plate theory, comprising the following steps: combining actual working conditions to obtain parameters of a calculation object, the parameters including geometric and physical mechanical parameters of a soil layer, a ground-connected wall and a support system; determining a deformation function of the underground continuous wall according to the third-order shear deformation plate theory; determining a coefficient matrix according to the Ritz method, the minimum potential energy principle and the earth pressure theory; obtaining a matrix equation according to the minimum potential energy principle; bringing the coefficient matrix into the matrix equation to solve the lateral deformation function of the underground continuous wall; the invention has the advantages of high precision of the calculation result and fast calculation speed, and providing optimized design guidance for the internal support arrangement mode, excavation step, ground-connected wall thickness and insertion ratio in actual construction.

The application discloses a processing method of low-cost high-performance tantalum alloy plate, which comprises the following steps: using a firm electrode obtained by uniformly mixing Ta powder, W powder and Nb powder and then welding as raw material, carrying out twice electron beam melting to obtain a large-size tantalum alloy ingot; through primary extrusion on the large-size ingot, repeated operations of turnover forging and shaping and secondary extrusion, a three-time extruded rod blank is obtained; finally, the extruded rod blank is subjected to blanking, intermediate annealing, cross-rolling and product annealing, and the preparation of the tantalum alloy plate is completed. The application uses Nb to replace part of the Ta matrix to prepare a new type of tantalum alloy, and the raw material cost can be reduced by about 1 / 4. Then, through multiple turnover forging and extrusion, cross-extrusion of the ingot is realized, the advantages of shear deformation and dislocation interlacing on grain crushing are fully utilized, the grain size of the prepared plate is above 8.0, and the mechanical properties are better than those of a traditional Ta2.5W alloy, so that the plate can be used as a preferred material for weapon equipment structural parts.

Sample holder for measuring the permeablity of a sample during shear deformation, and associated measuring device and method The invention relates to a sample holder (12) for measuring the permeability during shear deformation of a sample of material consisting of rock powders. The sample holder (12) comprises a central block (28) and at least one, preferably two, lateral block(s) (30, 32), the central block (28) having at least one central interface (34, 36), the or each lateral block (30, 32) having a lateral interface (60, 62). The central block (28) and the at least one lateral block (30, 32) are adapted to receive a sample layer (84, 86) of the sample between the central block (28) and the or each lateral block (30, 32), the sample layer (84, 86) coupling with the central interface (34, 36) on a first side and with the lateral interface (60, 62) on a second side. The invention further relates to a corresponding measuring device and method.

The invention relates to a high-sensitivity and high-durability vibration reduction and isolation support which comprises a base, a movable seat and a vertical shear energy consumption component. The vertical shear energy consumption component comprises a plurality of energy consumption rings which are vertically stacked and arranged; the energy consumption ring comprises at least one side sliding ring, each side sliding ring is provided with two inclined faces which are symmetrical up and down, and an arch is formed at the connecting position of the two inclined faces. The two slopes abut against sliding rings respectively, and rubber layers are fixed between the slopes of the sliding rings and the slopes of the side sliding rings. The vibration reduction and isolation support is used as an energy consumption damper to be used in energy dissipation and vibration reduction engineering. When the vibration reduction and isolation support is subjected to slight shock / vibration, large interaction force can be generated between the side sliding rings and the sliding rings, obvious extrusion shear deformation can be generated on the rubber layer, and therefore obvious vertical deformation can happen to the whole vibration reduction and isolation support, the vertical vibration reduction and isolation effect is generated, and the vibration reduction and isolation support is good in vibration reduction and isolation effect. And the rubber layer also can generate a considerable energy consumption effect in the extrusion shear deformation process, and has higher durability.