100 results about "Shearing deformation" patented technology

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 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 present disclosure relates to a tactile presentation device that includes a tactile presentation knob placed on an operation screen and for presenting a tactile sense to a user via the tactile presentation knob. The tactile presentation knob includes a conductive elastic portion that includes a surface layer facing the operation screen and an inner layer located on the side opposite to the operation screen, and an operation part that fixes the conductive elastic portion. The surface layer is set to be subjected to greater shear deformation than the inner layer by an operation of the tactile presentation knob, to generate vibrations by a change in the frictional force, and to be subjected to greater compressive deformation than the inner layer by a press of the tactile presentation knob. The inner layer is set to have higher vibration transmissibility than the surface layer.

This utility model discloses a spiral-grooved vibration-damping tapered shank cutting tool, relating to the technical field of BT-type tapered shank cutting tools. Specifically, it is a spiral-grooved vibration-damping tapered shank cutting tool, comprising a flange and a BT-type tapered shank. The surface of the BT-type tapered shank is provided with spiral grooves, which are filled with elastic damping material. This spiral-grooved vibration-damping tapered shank cutting tool, by designing spiral grooves in the BT-type tapered shank and filling them with elastic damping material, utilizes the multi-head spiral structure of the spiral grooves to disperse vibration energy in multiple directions. At the same time, the elastic damping material absorbs high-frequency vibrations through shear deformation. This "rigid-flexible composite" structural design solves the contradiction between vibration suppression and structural strength in BT-type tapered shank cutting tools, and also provides high structural reliability without affecting the original strength of the BT-type tapered shank. It offers a BT-type tapered shank cutting tool that combines high rigidity, good vibration reduction performance, and low manufacturing cost.

The invention discloses a preparation method of a nano-particle filled magnesium alloy wire for fuse wire additive. The preparation method comprises the following steps of (1) cast ingot extrusion, (2) soaking treatment, (3) drying and heating, (4) continuous extrusion and (5) shaping and sizing. Firstly, nano-particles are evenly adsorbed to the outer surface and an inner cavity of a magnesium alloy pipe in a soaking mode, then a magnesium alloy pipe blank is heated and fused in a continuous extrusion mode and subjected to sufficient shearing deformation, then a wire is extruded, the nano-particles and magnesium alloy are sufficiently fused in the whole process, surface physical adsorption is converted into tight metallurgical bonding, and the magnesium alloy pipe blank is subjected to high-temperature heat treatment. And under the action of violent shear deformation, the nano-particles are dispersed and distributed in the magnesium alloy wire structure, and no nano-particle loss exists.

The invention relates to the technical field of shear model boxes, and discloses a novel layered shear model box capable of simulating multi-directional vibration. Comprising a circular base, an outer stand column is fixedly connected to the upper surface of the circular base, a first spring is fixedly connected to the side surface of the outer stand column, and an inner annular steel sheet is fixedly connected to the end, away from the outer stand column, of the first spring. Through horizontal movement of the outward-extending steel rod, the outward-extending steel rod can drive the parallel stabilizing wheel to move horizontally, the parallel stabilizing wheel can roll on the surface of the external horizontal supporting rod, the stability of the outward-extending steel rod when the outward-extending steel rod drives the internal annular steel sheet to move horizontally can be improved, and the direct friction force between the outward-extending steel rod and the internal annular steel sheet is small; and the horizontal supporting rods on the external stable frame can play a role in restraining the outwards-extending steel rods, and it is guaranteed that the internal annular steel sheets only conduct shearing deformation in the horizontal direction.

The invention relates to the field of anti-galloping vibration reduction of power transmission engineering, in particular to a vibration reduction structure and a method applied to a power transmission line, and the vibration reduction structure comprises a shell, a movable part at least partially located in the shell, and a viscoelastic part arranged between the shell and the movable part; the movable part can move relative to the shell, when the movable part and the shell move relatively, the viscoelastic part deforms to provide damping force, the vibration reduction structure is installed in the power transmission line, when the power transmission line swings or vibrates, the pull rod and the shell move relatively, the viscoelastic layer is subjected to shear deformation, and energy is dissipated. The vibration amplitude of the power transmission line is reduced; when the amplitude of waving or vibration is further increased, the relative displacement between the pull rod and the shell is further increased, and the piston extrudes the viscoelastic balls, so that the viscoelastic balls generate extrusion deformation and mutual friction, energy is dissipated, and the amplitude of vibration is reduced.

The invention discloses a hybrid self-resetting support provided with a rate-dependent viscoelastic damper, which belongs to the technical field of seismic resistance of structural engineering, and comprises an outer pipe, an inner plate, a viscoelastic damper, a shape memory alloy U-shaped damper and channel steel, the viscoelastic damper is formed by stacking a viscoelastic material layer and a steel plate, is fixed between the inner plate and the outer pipe, and is arranged at the end part of the inner plate; when an earthquake acts, the inner plate moves in the axial direction relative to the outer pipe, the viscoelastic material layer is driven to be subjected to shear deformation, and damping force related to the loading frequency is provided; in addition, a plurality of shape memory alloy U-shaped dampers are arranged between the inner plate and the outer pipe at intervals in the supporting axial direction, and the self-resetting capacity is provided through bending deformation. The U-shaped damper and the viscoelastic damper are stressed in parallel, damping energy consumption and restoring force are generated at the same time, the floor acceleration and the base shearing force can be effectively reduced, and the device has the advantages of being simple in structure and reliable in connection.

The present application relates to the technical fields of image processing and point cloud processing, and discloses a line laser scanning three-dimensional reconstruction shear deformation correction method, system, computer readable storage medium and computer program product, the method comprises the following steps: according to the ratio of the height measurement value and the height nominal value of the height block, the first direction deflection angle of the line laser scanning camera is calculated;And the included angle between the straight line L and the predetermined horizontal line is measured, and the second direction deflection angle of the line laser scanning camera is obtained;The third direction deflection angle of the line laser scanning camera is obtained by using the constraint relationship that the adjacent edges of the checkerboard grid are perpendicular to each other;The photographed image is sequentially deflected and corrected according to the order of the three direction deflection angles, and then outputted.The present application does not need camera internal and external parameters, greatly reduces the system calibration difficulty, improves the angle solving precision through the joint estimation of the height block and the checkerboard grid, has strong algorithm robustness, can effectively remove the three-dimensional shear deformation caused by splicing, and has high algorithm reconstruction precision.

The application relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, and particularly relates to a high-temperature alloy cross-piercing process interlayer defect prediction method and model, which comprises the following steps: establishing a high-temperature alloy cross-piercing finite element model, and performing high-temperature alloy cross-piercing finite element simulation; extracting all data of equivalent strain, temperature, strain rate, maximum shear strain, stress triaxiality, maximum shear stress, equivalent stress and maximum shear strain at the moment of deformation termination in the whole deformation process; calculating integral to determine damage value, average temperature and average strain rate; and performing high-temperature alloy compression-shear deformation experiments under the average temperature and average strain rate determined in the previous step. The application can predict engineering fracture problems in an actual deformation process through simple compression-shear hot simulation deformation experiments and finite element simulation technology, reduces the trial-and-error process in the actual production process, and saves manpower, material resources and financial resources.

The invention relates to the technical field of numerical control, in particular to a real-time data driven cutting bed automatic control method and system and a storage medium. The method comprises the following steps: collecting dynamic stress data of a cutting bed cutter and microscopic deformation data of a fabric in real time through a multi-source sensing network, and constructing a physical coupling state space of the cutter and the fabric; according to the invention, through a collaborative optimization mechanism driven by multi-source sensing data, high-precision collaborative control of cutter dynamics and fabric deformation is realized in the field of cutting bed control, and through hardware synchronous triggering of the piezoelectric ceramic array sensor and the distributed optical fiber sensor, space-time alignment monitoring of cutter stress fluctuation and fabric interlayer shear deformation is realized. According to the design, the problem of time sequence mismatch of a traditional system in cross-scale data fusion is solved, the thermodynamic state of the cutter and fabric strain energy distribution form a computable incidence matrix, and a solvable space foundation of an optimization algorithm is laid.

The embodiment of the application provides a slope limit equilibrium method based on shear deformation coordination, relates to the technical field of slope stability analysis, and introduces the mechanical concept of shear deformation coordination into the limit equilibrium method, and after the target slope is discretized into a plurality of strips, mechanical calculation is carried out on each strip, the shear force at the bottom of the first strip to the shear force at the bottom of the n-th strip, the normal force at the bottom of the first strip to the normal force at the bottom of the n-th strip, the interstrip shear force and the interstrip normal force are sequentially solved, the H n+1 of the last strip node is obtained, and iteration is carried out to obtain the safety factor F n+1 of the target slope when the condition is met s , which is the safety factor F s of the target slope finally obtained. In the calculation of the interstrip shear force, the method introduces the basic assumption of deformation coordination, combines the calculation of the interstrip force with deformation, has clear physical meaning, avoids the randomness of the interstrip force assumption of the traditional limit equilibrium method, and makes the calculation result more scientific and reliable.

This invention belongs to the field of wind tunnel structural design and discloses a wind tunnel modulating plate structure based on combined damping technology. The structure includes a test section, modulating plate assemblies, connecting rods, constrained damping units, particle damping units, sidewalls, and a dynamic seal. The wind tunnel modulating plate structure comprises a transonic second throat or supersonic diffusion section formed by two symmetrically arranged modulating plate assemblies located behind the test section and two symmetrically arranged sidewalls. The modulating plate assembly includes three modulating plates hinged sequentially and constrained damping units fixed to the leeward side of each modulating plate. The middle modulating plate is connected to an external drive mechanism via a connecting rod mounted on the leeward side. When the modulating plate vibrates, the damping particles in the particle damping unit collide and rub against each other, while the damping layer of the constrained damping unit undergoes periodic shear deformation, thereby efficiently dissipating vibration energy. The wind tunnel modulating plate structure exhibits excellent vibration reduction performance, strong environmental adaptability, small added mass, and flexible layout, improving the reliability and safety of wind tunnel operation.

The application discloses a kind of strain and crack field's concrete deep flexural member shear deformation identification method, it is related to deformation identification technical field, for solving the problem of shear force transmission participation opportunity not timely, by the crack identification of the deep flexural member of the measured concrete, extract crack direction information and select target crack, in crack evaluation period, the number of connected cracks is counted and the trend of crack direction stability is analyzed, and then directional aggregation characteristics are formed, shear span ratio data are introduced to generate shear configuration class, and the compression strut path zone inside the deep flexural member is demarcated according to the shear configuration class, the stirrups are classified and strain monitored, the shear stress growth characteristics are analyzed, and the shear constraint coefficient is calculated, to determine whether the compression strut path stirrups enter the actual shear force transmission state, to effectively identify the shear deformation stage of the deep flexural member and the shear force transmission participation behavior of the stirrups.

The utility model relates to the technical field of welding supports, and discloses a welding support for metal plate processing, which comprises a welding support main body, an assembly mounting plate is fixed at the top of the welding support main body, and a metal hinge is mounted on the outer side of the assembly mounting plate; the device is provided with a reinforcing connecting mechanism, the stability of the connecting part of the metal hinge and the movable mounting pad is enhanced, the purpose of ensuring the stable fixing effect of the movable mounting pad on the welding support body is achieved, and huge thermal stress and shrinkage stress are generated in the welding process and can directly act on the clamping part. The section modulus and inertia moment of the area are obviously increased through outer side reinforcement, so that the area can better resist bending, distortion and shear deformation, and the geometrical shape of the support is stable; the device is provided with the reinforcing installation mechanism, the auxiliary reinforcing effect is achieved, the structural section changes more gently through the reinforcing design, and stress concentration at the abrupt change section position is reduced.

The steel rail corrugation control structure based on energy dissipation comprises a steel rail and particle dampers attached to the two sides of a rail web and the upper surface of a rail bottom, each particle damper comprises a metal shell, a dissipation cavity is formed in each metal shell, a buffer layer is laid in each cavity and attached to the side, adjacent to the steel rail, of the corresponding metal shell, and the particle dampers are connected with the metal shells. And the dissipation cavity is also filled with dissipation steel balls with various particle sizes. When the steel rail vibrates, the dissipation steel balls generate complex non-linear relative motion under the inertia effect, and vibration energy is consumed through collision, rolling and sliding processes between particles and between the particles and the buffer layer. Meanwhile, the synergistic effect of the dissipation steel balls and the buffer layer enables the system to form triple energy dissipation paths of particle collision, interface friction and rubber shear deformation, vibration energy is stably dissipated, the environmental adaptability is improved, damping performance attenuation is avoided, the system is adaptive to various lines, core components do not need to be replaced, and the operation and maintenance cost is reduced. And formation and development of steel rail corrugation can be inhibited continuously.

This invention provides a structural design support device that can evaluate vertical components, such as shear deformation. [Solution] The structural design support device includes: an evaluation point information acquisition unit that acquires evaluation point information representing the position information in a first state and the position information in a second state of evaluation points provided on a structure composed of multiple parts; and an evaluation value calculation unit that uses the evaluation point information acquired by the evaluation point information acquisition unit to calculate an evaluation value representing the magnitude of change in the positional relationship between the first evaluation point and the second evaluation point between the first state and the second state; wherein the evaluation value calculation unit calculates at least a first evaluation value which is the component perpendicular to the straight line connecting the first evaluation point and the second evaluation point of the vector obtained by dividing the relative displacement vector between the first evaluation point and the second evaluation point by the distance between the first evaluation point and the second evaluation point.

This invention provides a low-conductivity amorphous alloy material and its preparation method, belonging to the field of additive manufacturing. The preparation method includes the following steps: pre-oxidizing amorphous alloy powder under an oxidizing atmosphere to form an amorphous oxide layer on the surface of the amorphous alloy powder, thereby obtaining pre-treated amorphous alloy powder; and shaping the pre-treated amorphous alloy powder to obtain a low-conductivity amorphous alloy material. This invention, by pre-oxidizing the amorphous alloy powder and combining it with subsequent shaping processes to introduce an oxide interface layer into the amorphous alloy material, forms a network-like amorphous oxide interface. This not only effectively reduces the conductivity of the amorphous alloy material but also promotes the nucleation of the shear transition zone, avoiding the localization of shear deformation. Furthermore, the strong bonding between metal atoms and oxygen atoms on the amorphous oxide interface makes it difficult for the shear transition zone to expand through the oxide interface, thus promoting the improvement of material strength.

The invention discloses a shear test and simulation analysis method for a jointed rock mass containing a weak intercalated layer, relates to the technical field of underground engineering tests, and realizes accurate and efficient characterization of shear deformation and failure mechanisms of the jointed rock mass containing the weak intercalated layer. The method comprises the following steps: calibrating mesoscopic parameters of a fault mud geometric model according to a standard fault mud test shear stress displacement curve of a standard fault mud material in a direct shear test, determining mesoscopic parameters of a split rock geometric model according to a rock test shear stress displacement curve obtained by carrying out a variable-angle shear test on a complete rock, and calculating a split rock geometric model according to the mesoscopic parameters of the split rock geometric model. On the basis of the microscopic parameters calibrated by the two, according to a test shear stress displacement curve of the mud-clamping sample obtained by carrying out a variable-angle shear test on the jointed rock mass sample containing the weak intercalated layer, the microscopic parameters of the structural surface model in the geometric model of the mud-clamping sample are calibrated, and a mud-clamping sample model is obtained; and representing the shear deformation and failure mechanism of the jointed rock mass containing the weak intercalated layer according to the mud sample model.

The invention provides a shear restraint layer damping type pulse magnet coil and a preparation method thereof, and the pulse magnet coil comprises a coil body which forms an annular magnet structure; the structural shape of the insulating structural body is matched with the appearance of the coil body, and the insulating structural body wraps the outer side of the coil body, is made of an insulating material and is used for limiting the radial deformation of the coil body; and the viscoelastic damping layer is arranged between the coil body and the insulating structural body, wraps the coil body and is made of a viscoelastic material, and the two sides of the viscoelastic damping layer are fixedly connected with the outer surface of the coil body and the inner surface of the insulating structural body respectively. When pulse current is introduced into the coil body to generate vibration, the viscoelastic damping layer generates shear deformation along with vibration of the coil body and the insulation structure body, vibration mechanical energy is converted into heat energy through the viscoelastic material to be dissipated, and meanwhile axial and radial vibration reduction is conducted on the coil body. The structure is simple, the cost is lower, and radial and axial vibration reduction and fatigue resistance of the pulse magnet coil can be considered.

The invention provides a method for preparing a titanium alloy wire and the titanium alloy wire obtained by the method, and the method comprises the following steps: 1) enabling an initial titanium alloy wire to pass through a corner channel with consistent section size and shape, so that the initial titanium alloy wire is subjected to shear deformation; 2) carrying out at least one drawing-heat treatment cycle on the titanium alloy wire subjected to shear deformation, wherein the cycle comprises carrying out at least one roller die drawing on the titanium alloy wire and carrying out intermediate heat treatment on the drawn titanium alloy wire; and (3) carrying out final heat treatment on the titanium alloy wire after at least one drawing-heat treatment circulation is completed. According to the titanium alloy wire with high strength and high plasticity well matched is obtained through the synergistic effect of the'shear deformation 'treatment and the subsequent'drawing-heat treatment circulation' and / or the final heat treatment process.

The application provides a kind of pipe network engineering construction period intelligent remote monitoring method and system, related to underground space engineering safety technical field.The application obtains the transient dynamics parameters such as pipe network interface shear displacement, displacement rate and soil pore water pressure around pipe, and constructs system state vector and control vector by combining with construction machinery and grouting system operation boundary parameter, accurately reflects real-time dynamics state of pipe network;With pipe-soil coupling dynamics state evolution equation as constraint, with the minimum pipe network state deviation and control energy consumption as target to construct Hamilton function, and based on the pontryagin principle to solve the optimal control solution, realize the rapid deduction and global optimal control decision of pipe network deformation trend;Finally, the synchronous control instruction of mechanical frequency reduction and grouting pressurization is generated, which can complete active collaborative intervention in a very short time when high-frequency shear impact occurs, inhibit the transient shear deformation of pipe network interface, avoid interface shear separation damage, and reduce control energy consumption.

This invention relates to a flexible hinge structure with directional energy conversion characteristics and a parametric design method, comprising: at least one deformable structural unit, the deformable structural unit including a top beam, a bottom beam, and at least one inclined beam connecting the top beam and the bottom beam; wherein the top beam, bottom beam, and inclined beam enclose a structural cavity, and the central axis of the inclined beam is inclined relative to a local reference direction of the structure's location, so that when the deformable structural unit is subjected to vertical loads, the inclined beam undergoes coupled rotational and shear deformation, driving the deformable structural unit to generate displacement output along a predetermined direction. The beneficial effects of this invention are: this invention proposes a flexible hinge structure based on a pure geometric configuration, which can achieve controlled deformation and directional energy conversion under vertical loads without relying on additional rigid inserts.

The invention discloses an energy-absorbing, vibration-reducing and noise-reducing high-speed railway viaduct vibration-reducing effect evaluation method, which comprises the following steps: S1, arranging force sensors and displacement sensors in a restraint layer, a base layer and a damping layer of a high-speed railway viaduct structure, and collecting normal stress of the force sensors and the displacement sensors in three-axis directions, shear stress of x-y, y-z and z-x planes and displacement of the force sensors and the displacement sensors in corresponding directions; s2, performing the following assumptions to calculate a loss factor: (1) the viscoelastic damping material satisfies a linear viscoelastic constitutive relationship; (2) the restraint layer and the base layer meet the plane assumption in the vibration process, namely, the deformation is uniform; (3) the influence of shear deformation and rotational inertia of the structure is neglected; s3, determining the circular frequency of the vibration mode and the first-order mode of the constraint damping structure; s4, calculating strain energy of the constraint layer, the damping layer and the base layer; s5, calculating dissipated energy of the damping layer; and S6, calculating a transverse loss factor and a vertical loss factor in the first-order mode.

The invention discloses a coal and rock mass tension-shear deformation decoupling monitoring method, system and equipment based on a generalized equivalent geometric model and a medium, and relates to the field of coal mine rock mechanics monitoring, the method comprises the following steps: collecting a Brillouin frequency shift signal of each analysis unit to obtain the total optical fiber axial strain of each analysis unit; for any analysis unit, obtaining a real dislocation displacement vector to be determined according to the initial length and the deformation length; decomposing a real dislocation displacement vector to be determined into a projection component and equivalent shear displacement along the axial direction of the optical fiber; forming an equivalent right triangle model based on the initial length, the deformation length, the projection component along the axial direction of the optical fiber and the equivalent shear displacement; obtaining a tension-shear coupling equation based on the equivalent right triangle model; and based on the total axial strain of the optical fiber of the analysis unit, determining equivalent axial strain and equivalent shear displacement by adopting a tension-shear coupling equation. According to the method, accurate decoupling of the complex tension-shear deformation field of the coal and rock mass is realized.

The present application relates to punch equipment technical field, specifically disclose a die stripper plate locking mechanism and die tool;Among them, the die stripper plate locking mechanism includes sleeve, sleeve is sleeved on the outside of the sleeve, the sleeve is sleeved in the sleeve and moves along the vertical wedge, the sleeve is slidably installed on the sleeve and is in sliding cooperation with the wedge slider assembly, the sleeve is sleeved in the sleeve and is located at the bottom of the wedge and is in abutment with the wedge locking spring, the screw plug is installed on the top of the sleeve, and the stripper spring is sleeved in the sleeve and is located between the upper die and the upper stripper plate;The end of the wedge passes through the screw plug;In the initial state, the stripper spring, locking spring is in pre-compression state. And disclose the die tool;The present application can effectively make the punch piece above the manipulator during unloading, so as to facilitate the punch piece falling on the manipulator after unloading;At the same time, it can effectively avoid the shear deformation of the punch plane, effectively ensure that the upper stripper plate can press the punch material during blanking.

The invention discloses a bed separation grouting system and method capable of preventing a grouting pipe from deformation failure due to tension, bending, torsion and shear combination. The system comprises a grouting pipe assembly and a grouting device. The grouting pipe assembly comprises grouting pipes of a multi-section structure, every two adjacent grouting pipes are connected in a sealed mode through a spherical hinge connecting assembly, and each grouting pipe comprises an upper telescopic grouting section and a lower telescopic grouting section from top to bottom. The upper telescopic grouting section and the sleeve which is coaxially arranged are installed and connected, the sleeve is in damping fit sliding connection with the upper telescopic grouting section and the lower telescopic grouting section, grouting holes penetrating through the pipe wall of the grouting pipe are formed in the inner portion of the sleeve of the upper telescopic grouting section and the inner portion of the sleeve of the lower telescopic grouting section, and the sleeve is in the state of blocking the grouting holes; and the slurry output end of the grouting device is connected with the grouting hole in the top sleeve of the grouting pipe through a pipeline. The failure condition caused by the fact that the grouting pipe bears tension, bending and torsion combined deformation of a stratum can be prevented to the maximum extent, and then the effect of bed separation grouting is guaranteed.

The invention relates to the technical field of dynamic mechanical testing, in particular to a dynamic shear deformation freezing and measuring system and method for a monopulse torsion bar, and the system comprises a torsion bar system, a monopulse loading mechanism and a measuring system. The torsion bar system comprises an incident bar and a transmission bar and is used for conducting torsion stress waves and clamping the thin-wall tubular sample; the single pulse loading mechanism absorbs reflected wave energy through cooperation of a wave unloading rod and a one-way coupler, single pulse loading is achieved, and secondary loading is avoided. The movable buckle is arranged on the incident rod and used for accurately adjusting the loading pulse width, and the movable buckle is matched with the one-way couplers and the wave unloading rods on the incident rod and the transmission rod to achieve single-pulse loading control, so that the loading pulse width can be accurately adjusted in the form of a frozen sample after loading. And the thermal-mechanical coupling data in the loading process is synchronously obtained by using the infrared transient temperature measurement detector and the strain rosette, so that a high-precision experimental means is provided for deeply researching the shear band formation, damage evolution and thermoplastic instability mechanism of the material under the high-strain-rate shear load.

The utility model discloses a simulation loading test device suitable for 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 utility model 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 aspects 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 belongs to the technical field of aircraft strength and rigidity design, and particularly relates to a shear deformation component calculation method of a rectangular sandwich panel with four simply supported sides under normal force. The method includes the following steps that firstly, a coordinate system is defined based on the four-side simply-supported rectangular sandwich panel; 2, defining shearing parameters of the four-side simply-supported rectangular sandwich panel structure; 3, establishing an infinitesimal body balance equation; 4, establishing a control equation according to the infinitesimal Hooke's law; and 5, solving the shear deformation.