30 results about "Hooke's law" patented technology

The invention discloses a thin-walled workpiece machining deformation prediction method based on multi-source coupling residual stress, which comprises the following steps of: 1, obtaining a milling residual stress layer depth distribution curve under different machining parameters in a feeding coordinate system, and determining the position of a part surface calculation point in a workpiece coordinate system in a milling path, the milling residual stress in the feeding coordinate system is converted into equivalent milling residual stress distribution under the workpiece coordinate system by combining the included angle between the feeding direction and the coordinate axis of the workpiece; 2, based on an equivalent moment method, establishing a redistribution initial residual stress model of the thin-wall part in a bidirectional stress state; 3, according to the coupling characteristics of the plastic deformation area, the elastic recovery area and the elastic deformation area in the depth direction, a surface and subsurface coupling residual stress distribution model of the thin-wall part is established; and 4, on the basis of an equivalent moment method, enabling the coupling residual stress to be equivalent to additional torque, and predicting the bending deformation of the thin-wall part through the displacement and strain relation and the Hooke's law.

The invention discloses an auxiliary tool for installing a bidirectional bending large-dip-angle curtain wall system and a design method, and relates to the technical field of constructional engineering. Computer graphic design software is combined to measure the bending angle of the large-dip-angle curtain wall system and position relation data of the large-dip-angle curtain wall system and a main body structure; working face width required by curtain wall installation is calculated according to the position relation data; a stress model of the shelving platform is regarded as a single-span cantilever beam, and design checking calculation is conducted on the safety and stability of a main beam of a shelving platform system; and calculating the elongation of the steel wire rope under the load action of the hanging basket by adopting Hooke's law, and comparing whether the elongation of the steel wire rope exceeds a safety distance threshold between the guide steel wire rope and the structural surface. Through reasonable design and scientific checking calculation, the hanging basket can be used in cooperation with a conventional hanging basket, the advancing direction of the hanging basket is controlled through the guiding device, a reliable working face is provided for a curtain wall system of a bidirectional bending large-dip-angle model, and the problems that the curtain wall system of the type is long in installation period, high in measure cost and the like are solved.

The invention discloses an elastic reverse time migration imaging method based on deviatoric stress characterization, and relates to the technical field of exploration geophysics. Deviatoric stress is introduced into a conventional elastic wave equation, and a speed-deviatoric stress elastic wave equation describing stress propagation characteristics is obtained through derivation; based on Hooke's law, P wave contribution in total partial strain is removed through partial strain decomposition, decoupling of P-S wave stress components is achieved, and correctness of amplitude, phase and physical unit of a decoupling wave field is guaranteed; and then a joint imaging condition with the average stress as a seismic source wave field and the multi-stress component as a receiving wave field is constructed, PP waves are subjected to normalization superposition through the average stress and the deviatoric stress, and PS waves are subjected to shear stress imaging. According to the method, the sensitivity to heterogeneity and local stress variation of underground media can be remarkably improved, P-S wave crosstalk and imaging noise are effectively eliminated, the imaging precision and resolution of a complex geologic structure are greatly improved, and a reliable technical means is provided for high-precision seismic exploration of complex oil and gas reservoirs.

The application provides a winding machine automatic trimming compensation method and system based on tension detection, comprising: sampling tension tracking results under different line speeds, curve fitting the samples obtained by sampling to obtain a relationship curve; according to Hooke's law and the curve fitting result, obtaining diameter estimation values of sections at various positions of a yarn surface. The estimated diameters of sections at various positions of the yarn surface in one round trip are checked, whether the estimated diameter of the edge of the yarn surface is abnormally increased is checked, and the abnormal lifting condition of the edge of the yarn surface is determined. According to the severity of the lifting condition, the amplitude of soft edge correction is determined, the edge of the yarn surface is leveled, and the condition that the edge of the yarn surface exceeds the edge of the bobbin is solved. The soft edge correction condition is counted, the increase and decrease of the reference position of the edge of the yarn surface are confirmed according to the frequency and amplitude of the occurrence, the uneven speed of the edge of the yarn surface is accelerated, the number of soft edge correction is reduced, and the condition that the edge of the yarn surface cannot reach the edge of the bobbin is solved.

The invention provides a construction method of an anisotropic rock mass equivalent degradation mechanical model, which comprises the following steps: S1, determining a mechanical model: based on a generalized Hooke's law, the basic expression form of the rock mass mechanical model can use an incremental expression of a stress-strain relationship; s2, determining an elastic stiffness matrix: constructing an elastic stiffness matrix # imgabs0 # by adopting a symmetric matrix method in an inner product form; and S3, determining a plastic strain increment: determining a yield function # imgabs1 #, obtaining a dilatation angle # imgabs2 #, replacing an internal friction angle # imgabs5 # in the yield function # imgabs4 # with the dilatation angle # imgabs3 # to obtain a plastic potential function # imgabs6 #, and solving an increment # imgabs8 # of a plastic strain tensor with the plastic potential function # imgabs7 #. On the basis of the equivalent elastic-plastic theory, the anisotropic rock mass equivalent degradation mechanical model considering the synergistic effect of the intermediate principal stress and the structural plane occurrence is established, so that the model can reflect the brittle-ductile degree, the capacity expansion characteristic and the failure mechanism of a material and the influence mechanism of the intermediate principal stress and the structural plane.

A rolling load distribution calculation method for a rolling mill (10) comprises the steps of: calculating the rolling load distribution of a rolling mill (10) on the basis of the Hooke's law of the plane strain state of a material to be rolled (1) and the balance of the force in the roll gap of the rolling mill (10) by using a rolling direction stress distribution approximated by a function dependent on the position coordinates of the rolling direction of the rolling mill (10); calculating the contact arc length of at least one of the elastic recovery area and the elastic depressed area; and calculating a rolling load distribution of at least one of the elastic recovery region and the elastic depression region on the basis of the contact arc length.

Disclosed is a formation pressure calculation method and system based on Hooke's law. The method may include: calculating the bulk modulus of the fluid according to the longitudinal wave equation; calculating the dry bulk modulus according to the fluid bulk modulus; calculating the effective stress according to the dry bulk modulus through Hooke's law; and calculating the formation pressure according to the effective stress and the overlying formation pressure. The present invention derives the theoretical relationship between the effective stress and the rock velocity based on the wave equation and the elementary elastic theory, and predicts the formation pressure in combination with the effective stress principle. It does not need to construct a normal compaction trend line, and is better adapted to the prediction of carbonate formation pressure.

The invention discloses a salt rock creep model construction method based on a nonlinear integer order sticky kettle, and the method comprises the following steps: introducing a Riemann-Liouville fractional order definition method, and obtaining a fractional order Abel sticky kettle model based on the Hooke law of an ideal elastomer and the Newton viscosity law of an ideal fluid; according to the Hooke's law of the elastic element, the constitutive relation of the fractional order Abel sticky kettle and the relation between the Newton's viscosity law and the power function, the constitutive relation of the nonlinear integer order sticky kettle is obtained by combining the evolution trends of the power functions of different orders; an elastic element, a fractional order Abel sticky kettle and a nonlinear integer order sticky kettle are combined to construct a four-element nonlinear viscoelastic plastic creep model for describing the whole salt rock creep process, the creep model established according to the method can be used for describing the creep deformation of surrounding rock in the operation process of a deep salt cavern reservoir, and a theoretical basis is provided for salt cavern stability evaluation and safe operation.

The application provides a construction method of an anisotropic rock mass equivalent degradation mechanical model, comprising the following steps: S1, determining a mechanical model: based on the generalized Hooke's law, the basic expression form of the rock mass mechanical model can be expressed by an increment expression of a stress-strain relationship; S2, determining an elastic stiffness matrix: an elastic stiffness matrix is constructed by using a symmetrization matrix method in an inner product form; S3, determining a plastic strain increment: a yield function is determined, an expansion angle is obtained, the inner friction angle in the yield function is replaced by the expansion angle to obtain a plastic potential function, and the plastic potential function is used to solve the increment of a plastic strain tensor. On the basis of the equivalent elastoplastic theory, the anisotropic rock mass equivalent degradation mechanical model considering the synergistic effect of the intermediate principal stress and the structure surface occurrence is established, so that the model can reflect the brittle and ductile degree, the expansion characteristics, the failure mechanism and the influence mechanism of the intermediate principal stress and the structure surface.

The invention discloses an intelligent wrapping correction system based on finished product quality monitoring, relates to the technical field of wrapping correction, and solves the technical problem of lack of systematicness and accuracy in adjustment of key parameters such as wrapping pitch and tension. On the basis of a scientific calculation formula, the pitch adjusting amount is accurately calculated through analysis of an overlapping ratio difference value, and then the wrapping pitch and the rotating speed are accurately adjusted. Compared with the prior art that the pitch is adjusted according to experience, the method is more accurate and scientific, the wrapping quality can be effectively improved, the secondary correction analysis module deeply analyzes the relation between the width of the wrapping material and the tension of the material, a scientific calculation model is established according to the material mechanics knowledge and Hooke's law, and the calculation accuracy is improved. And the target tension is accurately calculated and adjusted.

The present invention relates to the technical field of life state evaluation of key accessories of the operating mechanism of SF6 circuit breakers, and particularly relates to a fatigue life analysis method for the oil buffer of the operating mechanism of SF6 circuit breakers. The simulation method includes establishing an overall three-dimensional model of the circuit breaker operating mechanism to carry out rigid body dynamics calculations to obtain accurate changes in piston force; selecting typical and key positions during the operation process of the oil buffer as calculation points to obtain comprehensive static calculations and fatigue analysis of the oil buffer; calculating the fatigue life distribution of the oil buffer based on Hooke's law, stress life, and the S-N curve of the material. The fatigue life analysis method adopted by the present invention calculates the fatigue life during the operation process of the oil buffer of the SF6 circuit breaker operating mechanism accurately and comprehensively, uses it to find the real life weak points, provides a guiding direction for the subsequent design optimization of the oil buffer, and also provides a theoretical basis for the condition monitoring of the circuit breaker operating mechanism.

The invention discloses a stress and rigidity analysis method under a multi-waveform diaphragm disc angular load, which comprises the steps of defining geometric and working condition parameters, constructing a segmented deflection model, establishing a non-axisymmetric stress analysis model and deducing an angular rigidity analysis formula. Deducing a deflection expression of the maximum deformation section by segmenting the corrugated molded line and setting continuous conditions of displacement, slope and curvature; establishing a bending-torsion coupling model through a cylindrical coordinate system, and obtaining radial, circumferential and tangential stress analytic expressions in combination with Hooke's law; and the total bending moment is solved by performing circumferential integration on the infinitesimal bending moment and the shearing force, and the angular stiffness is calculated, so that integrated analytic solution of the deflection, the stress and the stiffness is realized. According to the method, high-precision prediction of the angular mechanical behavior of the complex corrugated diaphragm disc is achieved, the calculation efficiency is high, the result is stable and consistent, a large amount of finite element iteration can be effectively replaced, and a reliable tool is provided for structural optimization and engineering design of the diaphragm disc coupler.

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.

The application discloses a method for determining key parameters of a cable structure and relates to the technical field of bridge construction. The method comprises the following steps: obtaining the position information of two end points and a lowest point of a catenary of the cable structure, the cross-sectional area of the cable structure, the gravity per unit length and the elastic modulus; establishing a functional relationship about the position information of the cable structure and the cross-sectional area of the cable structure, the gravity per unit length and the elastic modulus based on the balance of cable element force and Hooke's law; and determining the key parameters of the cable structure according to the functional relationship about the position information of the two end points and the lowest point of the catenary of the cable structure and the cross-sectional area of the cable structure, the gravity per unit length and the elastic modulus. The method solves the problems that the calculation of a suspension cable in the prior art usually adopts a finite element program simulation analysis, the model is complex to establish, the calculation amount is large, and the correctness of the calculation result cannot be determined.

The invention provides a fusion reactor CICC superconducting magnet equivalent winding material parameter calculation method, and the method comprises the steps: determining a minimum unit cell unit corresponding to a superconducting magnet winding; constructing a finite element model of a minimum unit cell unit; applying a specific load and a constraint condition to the finite element model, outputting a calculation parameter corresponding to the initial material parameter, and calculating the initial material parameter by using a generalized Hooke's law according to the calculation parameter; establishing an equivalent model of the superconducting magnet winding according to the initial material parameters, and performing comparison verification on the equivalent model and a pre-established detailed model of the superconducting magnet winding; wherein if the comparison verification is passed, the initial material parameter is used as the material parameter of the equivalent winding corresponding to the superconducting magnet winding; and if the comparison verification is not passed, re-determining a new minimum unit cell unit. According to the invention, the minimum unit cell units replace the whole winding, and the winding is simplified into the set of the minimum unit cell units, so that the calculation efficiency can be improved while the equivalent parameter precision is ensured.

The utility model discloses a positioning shearing frock of plate shearing machine, including fixed box, the first hydraulic rod that drives pressing plate moves is arranged in the fixed box inside, and pressing plate bottom is connected with mounting plate through the spring of symmetrical setting, the ranging component that is used for detecting the interval between pressing plate and mounting plate is arranged in the pressing plate bottom, the abutment that is used for the down -pressing limit of board is provided with in mounting plate bottom, the board is placed in the extension platform top, and the extension platform is installed in the inboard of base, the movable cutting mechanism that is used for cutting board is installed in the fixed box inside, the utility model discloses the spring of symmetrical setting of pressing plate bottom is connected with mounting plate, and the interval between pressing plate and mounting plate is detected to ranging component, and the actual pressure of abutment to board is inferred according to hooke's law, realizes the control of the down -pressure of different thickness board.

The invention discloses a pilot elastic piece design method based on simulation analysis. The pilot elastic piece design method comprises the steps that S10, a three-dimensional model of a pilot elastic piece is constructed; s20, performing statics simulation analysis on the three-dimensional model based on finite element software to obtain a simulation analysis result of the three-dimensional model under a set boundary condition; s30, based on the simulation analysis result, calculating the actual rigidity of the three-dimensional model by utilizing Hooke's law; s40, when the actual rigidity is different from the design rigidity of the three-dimensional model, optimizing the three-dimensional model by adjusting the important size of the three-dimensional model; and S50, the steps S10-S40 are repeated until the difference between the actual rigidity and the design rigidity is smaller than a set threshold value. According to the method, the rigidity of the elastic piece is calculated through simulation analysis, the time cost of processing and re-verification is saved, and the capital cost generated by processing is reduced.

The invention discloses a pressure sensor and a preparation method thereof. The pressure sensor comprises a microstructure sensing layer; the microstructure sensing layer comprises a lower substrate and a plurality of spiral structure units positioned on the upper surface of the lower substrate, and each spiral structure unit is constructed by regularly rotating a spiral blade by taking a central shaft as a reference. As the spiral structure unit is arranged in the microstructure sensing layer in the pressure sensor provided by the invention, based on the fact that the spiral structure meets Hooke's law under a certain condition, the deformation of the spiral structure unit and the pressure load are in a linear relationship under the action of pressure, and the inherent property of structural hardening of the existing pressure sensor is overcome; the defects that a sensitivity curve of an existing pressure sensor tends to be saturated under the action of large pressure, and sensitivity is reduced are overcome.

The invention belongs to the technical field of micro-scale material tension and compression fatigue detection, and particularly relates to a micro-scale material in-situ tension and compression fatigue detection method, which comprises the following steps: step 1 to step 6, selecting a blank, and preparing a substrate through milling and rounding; taking enough tiny samples, and curing the tiny samples on a substrate by using an adhesive to form a test block; fixing a strain element on the outer surface of the test block for monitoring a strain signal of the test block; opening a clamp of the in-situ loading table, and clamping the substrate from two ends; starting the in-situ loading table to realize a stretching, compression or fatigue test on the micro sample; acquiring strain data of the test block, and calculating the loading strength borne by the test block through a Hooke's law formula. According to the invention, a micro sample, a strain element and a substrate are compounded, a clamp device of an in-situ loading table does not need to be transformed or replaced, and the stretching, compression or fatigue test of the micro sample is realized only through a stretching device of the in-situ loading table.

The invention belongs to the technical field of buffeting detection of an aircraft model supporting system in a hypersonic flow field environment, and discloses a vibration analysis method of a multi-degree-of-freedom high-frequency motion simulation device for a high-speed wind tunnel experiment. Firstly, an engineering model is simplified into a multi-flexible-spring and rigid-plane-coupled two-degree-of-freedom rotation vibration system with four flexible springs and a rigid plane coupled according to rigid mechanics and an elastomer theory, the four flexible springs transmit actuation energy and amplify the vibration effect, one end of each spring is fixedly connected to an excitation source, and the other end of each spring is fixedly connected to a vibration source. And the other end is connected with the rigid plane to generate a directional actuation angle. A default excitation source end can stably output sine periodic driving force, and a vibration control equation of the micro-unit is listed according to the Alembert principle and the generalized Hooke law; and finally, according to a coupling coordination condition, obtaining a two-degree-of-freedom vibration equation, and completing real-time and accurate analytical calculation of the whole vibration model through direct calculation on the premise of not depending on any force position measuring point.

The present invention discloses a method for simulating the hysteresis characteristics of soft magnetic materials under stress. First, it is assumed that the soft magnetic material is composed of a large number of magnetic domains. The icosahedron is subjected to six times of refined triangulation to determine the initial magnetization intensity directions of various magnetic domains. Based on the mesoscopic magnetization theory and Hooke's law respectively, mathematical models of magnetic domain magnetization intensity and strain are constructed. The expression of Gibbs free energy considering the second-order stress is derived to obtain the expression of the non-hysteretic volume fraction of magnetic domains. According to the homogenization theory, a mathematical model of the non-hysteretic magnetization intensity of the overall soft magnetic material is constructed. By applying the mesoscopic energy conservation principle, the hysteresis model of the soft magnetic material is derived and solved based on the fourth-order Runge-Kutta method to simulate the hysteresis loop of the soft magnetic material under different stresses. The present invention not only accurately and quickly simulates the hysteresis characteristics of soft magnetic materials under stress, but also lays a theoretical and technical foundation for research such as the accurate simulation of the electromagnetic-mechanical comprehensive characteristics and the global structural optimization design of electrical equipment containing soft magnetic materials.

The invention discloses a hydraulic pressure linear adjusting and hydraulic pressure buffering device which is composed of a piston, a spring, a plug, a check ring and a matched sealing ring, and compared with the prior art, the hydraulic pressure linear adjusting and hydraulic pressure buffering device has the advantages that the buffering response time and the pressure stability control of the input end are better; and according to the Hooke's law, the change of the spring force is linear change, so that the pressure of the output end is ensured to be linear change, and the buffer has a hydraulic pressure linear adjustment function of a switch electromagnetic valve, which is not possessed by buffers on the market.

The utility model provides a device for synchronously measuring the thickness and the elastic modulus of a film. The device comprises a base, a bearing table and a measuring mechanism, wherein the bearing table and the measuring mechanism are arranged on the base; the measuring mechanism comprises supporting shafts which are located on the two sides of the bearing table and are vertically fixed to the base. The limiting bearing is vertically arranged right above the bearing table and is fixedly connected with the supporting shaft through a cross beam; the measuring rod penetrates through the limiting bearing in the vertical direction and can abut against the upper end face of the bearing table by means of self weight; and a displacement sensor is arranged right above each measuring rod. According to the utility model, when the thickness of the film is measured, the thickness of the film is solved based on Hooke's law by using the internal stress-strain relation in the elastic deformation range of a material line according to the measured deformation, loading force and film thickness data, and the film deformation error caused by a mechanical measurement mode is compensated to a final film thickness measurement result. And finally measured thickness and elasticity modulus results are more accurate.

A method for calculating the rolling load distribution of a rolling mill 10, comprising: calculating the contact arc length of at least one of the elastic recovery and elastic reduction regions based on Hooke's law under the plane strain condition of a rolled material 1, the force balance within the belt-roll contact of the rolling mill 10, and the stress distribution in the rolling direction approximated by a function that depends on the position coordinate in the rolling direction of the rolling mill 10; and calculating the rolling load distribution of at least one of the elastic recovery and elastic reduction regions based on the contact arc length.

The present application belongs to the technical field of buffet detection of aircraft model support system in hypersonic flow field environment, and discloses a vibration analysis method of multi-degree-of-freedom high-frequency motion simulation device for high-speed wind tunnel experiment. Firstly, according to rigid body mechanics and elastic body theory, the engineering model is simplified into a two-degree-of-freedom rotational vibration system coupled by four flexible springs and a rigid plane, mainly by four flexible springs to transfer actuation energy and amplify vibration effect, one end of the spring is fixed to the excitation source, the other end is connected to the rigid plane, so as to produce directional actuation angle. The excitation source end can stably output sinusoidal periodic driving force by default, and the vibration control equation of the micro unit is listed according to d'Alembert principle and generalized Hooke's law; finally, the two-degree-of-freedom vibration equation is obtained according to the coupling coordination condition, and the real-time accurate analytical calculation of the whole vibration model is realized without relying on any force position measuring point.

The invention discloses a rivet under-load deformation amount in-situ measurement and failure point location correlation modeling method, which comprises the following steps: after riveting deformation of a structural member, carrying out in-situ measurement on the deformation amount under the condition that a rivet section area is under load to obtain an axial deformation amount curve of a feature point set along an outer contour line of the rivet in the rivet section area; decomposing the axial deformation amount of the feature point into a transverse expansion amount and a longitudinal deformation amount, and constructing a correlation degree measurement model for quantifying the correlation between the deformation amount and the failure point location in combination with the coordinates of the failure point location; in the modeling process, based on Hooke's law and Poisson's ratio definition, establishing a relationship between the transverse expansion amount and the transverse stress of the feature points; based on the Hooke's law and the yield strength plastic deformation rule, the relation between the longitudinal deformation amount and the longitudinal force of the feature points is established; and combining the influence of the axial deformation of the feature point and the weighting and section shape of the distance measurement of the failure point location on the failure point location so as to obtain the correlation degree measurement model.

The invention discloses a salt-freeze thawing coupling damaged soil constitutive model construction method and system, and relates to the technical field of geotechnical engineering.The method comprises the steps that firstly, salt-containing and salt-free soil samples before and after freeze thawing are prepared, and the elastic modulus change rule of the soil samples is obtained through a static triaxial test; further defining and calculating salt damage variables, freeze-thaw damage variables and coupling damage factors of the salt damage variables and the freeze-thaw damage variables; secondly, on the basis of the Lemaitre strain equivalence principle, a damage factor reflecting infinitesimal strength Weibull distribution is introduced, and in combination with the generalized Hooke's law and the generalized Ewy Lade-Duncan damage criterion, a soil constitutive model capable of comprehensively representing the salt and freeze-thaw coupling damage effect is constructed; and finally, solving model parameters by utilizing peak value characteristics of the stress-strain curve. According to the method, the mechanical behaviors of the marine soft soil subjected to artificial freezing method construction can be predicted more accurately, and an effective theoretical tool is provided for design and safety evaluation of projects such as subsea tunnels in coastal regions.

The invention discloses a method for calculating the circumferential stress of a wrapped rib material of a wrapped gravel pile under the action of axial force, which comprises the following steps: step 100, taking the wrapped gravel pile as an elastic pile body, taking a pile bottom foundation as an elastic foundation, taking a pile top as an origin of coordinates, taking the downward direction along the longitudinal axis of the pile body as a coordinate z axis, and calculating the circumferential stress of the wrapped rib material of the wrapped gravel pile; calculating the axial pressure stress of the pile body according to the static balance condition, the physical equation, the geometric equation, the pile top boundary condition, the general characteristics of the axial deformation of the pile body and the displacement coordination of the pile bottom end of the pile body at the coordinate z; and step 200, according to the Hooke law, the deformation coordination of the pile body and the pile body wrapping rib material, the elastic mechanics theory and the coefficient correction considering the inelasticity of the actual pile body and the stratum, calculating to obtain the circumferential tensile stress and the circumferential tensile force of the pile body wrapping rib material. The method is simple in concept, practical and easy to operate.

A neodymium iron boron rare earth permanent magnet iron performance testing device disclosed by the present invention comprises a base, the top of the base is symmetrically and fixedly connected with displacement guide rails, the outer side of the base is fixedly connected with a driving motor, the output end of the driving motor is fixedly connected with a screw rod, and the outer side of the screw rod is in threaded connection with a fixing mechanism. The outer side of the displacement guide rail is slidably connected with a sliding seat, the top of the sliding seat is fixedly connected with a mounting plate, and the top of the mounting plate is fixedly connected with a magnetic stress block. The device is provided with an attractive force testing device, and a shifting plate compresses a compression spring on the inner side of a graduated drum. The elastic force generated by compression of the compression spring is balanced with the attraction force between the to-be-tested magnet and the magnetic stress block, at the moment, the compression amount of the compression spring can be read by observing the position of the shifting plate on the outer side of the graduated drum, and the attraction force between the to-be-tested magnet and the magnetic stress block can be calculated according to the Hooke's law.

The utility model relates to the technical field of physics, in particular to a Hooke law demonstration device for physics teaching, which comprises a hollow base, the top of the hollow base is detachably connected with a vertical support plate, the upper end of the vertical support plate is detachably connected with a fixing frame, the fixing frame is provided with symmetrically distributed sliding chutes, the sliding chutes are internally and fixedly connected with sliding rods, and the sliding rods are fixedly connected with the vertical support plate. And a sliding block is slidably arranged on the sliding rod, a mounting plate is fixedly connected to the bottom of the sliding block, and first fixing rings which are symmetrically distributed are fixedly connected to the bottom of the mounting plate. According to the utility model, by comparing the deformation stretching distances of the springs at the left side and the right side during Hooke's law test, the research on the linear relationship between stress and strain (unit deformation) in a material is facilitated, so that the linear proportional relationship between the deformation quantity and the variation quantity of the springs can be intuitively found.