136 results about "Bending stiffness" patented technology

The invention provides a reinforcing beam reinforced by adopting an out-of-service wind power blade and a method for determining the bending rigidity. According to the reinforcing beam, a plurality of grooves are formed in at least one surface of a reinforced concrete beam; the reinforcing layer comprises reinforcing ribs and a cement-based composite matrix, a plurality of protrusions are arranged on the surface of the cement-based composite matrix, the protrusions are arranged at intervals in the length direction of the cement-based composite matrix, and the protrusions are correspondingly embedded into the grooves, so that the reinforcing layer is connected with the reinforced concrete beam to obtain a reinforced concrete reinforced beam; wherein the reinforcing ribs are obtained by disassembling and cutting a main beam of the retired wind power blade. According to the reinforcing beam, the combining capacity of the reinforced concrete beam and the reinforcing layer is high, mutual slippage is avoided, the retired wind power blade composite material resources are utilized, the environment is protected, and the cost is saved while high-performance reinforcing treatment can be conducted on the damaged reinforced concrete beam structure or the reinforced concrete beam structure with insufficient bearing capacity.

The invention provides a parameter determination method and device for an elastic flywheel, a storage medium and electronic equipment, and the method comprises the steps: constructing an optimization model, and carrying out the solving calculation of the optimization model according to an optimization variable, a constraint condition and an optimization target, and obtaining a calculation result; wherein the optimization variables are the number of the middle diaphragms, the thickness of a single middle diaphragm and the position relation between any two middle diaphragms, the constraint conditions are the total thickness of the diaphragms and the minimum strength range of the diaphragms, and the optimization target is to minimize the bending rigidity of the middle diaphragms; the target solution of the calculation result comprises the target diaphragm number of the middle diaphragms, the target thickness of each middle diaphragm and the target position relation between any two middle diaphragms. According to the method, under the condition that the torsional rigidity is not changed, the bending rigidity and strength are flexibly controlled by flexibly combining the number of diaphragms, the thickness of the diaphragms, the arrangement sequence of the diaphragms and the like, so that the effects of high reliability and shafting centering compensation capability are considered.

The utility model belongs to the technical field of steel structures, and particularly relates to I-shaped steel for a bridge, which comprises an I-shaped steel body, a plurality of holes are uniformly distributed on a web of the I-shaped steel body, and foamed aluminum is filled in each hole. A plurality of reinforcing ribs are further arranged on a web of the I-shaped steel body, the reinforcing ribs and the holes are distributed in a staggered mode, every two adjacent I-shaped steel bodies are connected through a connecting mechanism, the holes are of a hexagonal structure and evenly divided into a plurality of groups, and the multiple groups of holes are evenly distributed in the length direction of the I-shaped steel body. The plurality of groups of holes and the plurality of reinforcing ribs are alternately distributed; according to the utility model, the plurality of holes are formed in the I-shaped steel body, and the foamed aluminum is filled in each hole to form a'metal framework + core material 'composite structure, so that compared with a solid web, the weight is reduced by 25%-30%, and the flexural rigidity is improved at the same time; the adjacent I-shaped steel is connected through the connecting mechanism, and detachable connection is achieved.

The utility model provides a kind of electronic thoracoscope with universal bending insertion part, including operating part and insertion part extending along length direction, the insertion part includes front end portion, active bending section, passive bending section and rigid pipe section from distal end to proximal end in order, the front end portion is equipped with optical imaging module and illumination light source;Active bending section is set in the proximal end of the front end portion, by multiple jointed snake bone unit, actively bends in response to operating part control;Passive bending section is connected to the proximal end of active bending section, the passive bending section has universal bending characteristic and the bending stiffness of the passive bending section is less than active bending section;Rigid pipe section is connected to the proximal end of passive bending section.The utility model expands the observation range of thoracoscope by passive bending section, reduces observation blind area, avoids the direct confrontation of active bending section and the rigid structure of guide sleeve inlet, prolongs the service life of equipment, reduces the loss risk of equipment.

The present application relates to a kind of pre-tensioned steel wire rope lateral impact response calculation method considering geometric and friction nonlinear coupling.First, the linear tensile constitutive model of pre-tensioned steel wire rope is constructed, Von Kármán large deflection theory is introduced, and the geometric hardening relationship of the nonlinear growth of axial tension with lateral deflection is established;Subsequently, a bilinear bending stiffness model is constructed to calculate the critical anti-sliding torque that evolves dynamically with tension;Based on the principle of energy conservation and Rayleigh-Ritz method, the system total potential energy functional of axial tensile potential energy and nonlinear bending potential energy is constructed, and the maximum impact deflection and tension response of the steel wire rope are obtained by solving the energy residual equation, the maximum response is substituted back into the constitutive equation, and the maximum nominal stress of the midspan cross section, the maximum axial tension and the extension length of the internal slip zone are calculated.The present application has very high calculation efficiency compared with full-size finite element simulation, and is suitable for the rapid design and safety evaluation of steel wire rope protection system.

A tail assembly for a rotorcraft having a fuselage. The tail assembly includes a stabilizer having an aft spar and a forward spar. An aft joint couples the aft spar to the fuselage and defines a pitch axis such that the aft joint allows the stabilizer to pivot about the pitch axis. A forward joint couples the forward spar to the fuselage. The forward joint has an axial stiffness configured to tailor a chordwise pivot mode of the stabilizer and a bending stiffness configured to tailor a beamwise bending mode of the stabilizer. The chordwise pivot mode of the stabilizer is decoupled from the beamwise bending mode of the stabilizer.

The invention relates to the field of buildings, in particular to a reinforced concrete member manufacturing method and a post-cracking bending rigidity calculation method.The reinforced concrete member manufacturing method comprises the following steps that S1, a steel reinforcement framework is fixed to the set position of a concrete pouring mold, and a reinforced area of a concrete body is determined; s2, determining structural parameters of the reinforcing grooves and the reinforcing ribs; s3, the foam board is cut to enable the shape of the foam board to correspond to the shape of the reinforcing groove, and the foam board is fixed to the position, corresponding to the reinforcing area, in the concrete pouring mold; s4, concrete is poured into the concrete pouring mold, a concrete main body is formed after the concrete is cured and solidified, and after the concrete main body is demolded, the internal foam plate is emptied to form a reinforcing groove; and S5, reinforcing ribs are inserted into the reinforcing grooves, the reinforcing grooves are filled with UHPC, and machining of the concrete member is completed after maintenance. The bearing capacity and durability of the reinforcing system are improved, meanwhile, the glass fiber reinforced resin composite material in the retired wind power blade is applied to the reinforcing system, and the reinforcing cost is reduced.

The present disclosure provides a Timoshenko beam model equivalent method and system of a corrugated steel plate support structure, and relates to the technical field of stress analysis of a corrugated steel plate support structure, comprising: solving the stiffness coefficients of the corrugated steel plate in a local coordinate system, including tensile stiffness, bending stiffness and shear stiffness; solving the equivalent stiffness coefficients of the orthotropic corrugated steel plate in a global coordinate system, including equivalent tensile stiffness, equivalent bending stiffness and equivalent shear stiffness; solving the equivalent section bending stiffness of the corrugated steel support structure; solving the equivalent section shear stiffness of the corrugated steel support structure; and equivalent the corrugated steel support structure to a Timoshenko beam model. The present disclosure can realize the rapid equivalent of the corrugated steel plate support structure to a Timoshenko beam model.

Method for determining a static bending stiffness (C B,stat ) of an object (1) which is vibrationally decoupled from an environment and arranged on at least two support means (2, 3), from dynamic acceleration measurements after vibration excitation of the object (1), comprising the steps a) Establishing a plurality of force application points (4) on the object (1), b) Arranging a number of accelerometer means (5) on the object (1), c) Exciting the object (1) at the force application points (4) determined in step a) using vibration generating means and determining a number of frequency response functions from the accelerations measured using the acceleration sensor means (5), d) Calculating an acceleration vector of the object (1) from the frequency response functions obtained in step c), e) Calculating a displacement vector from the acceleration vector determined in step d), f) Calculating a number of dynamic bending stiffness curves from the forces acting at the force application points (4) and the deflections of the object (1) induced by the displacements with the displacement vector, g) Extrapolating at least one of the dynamic bending stiffness curves obtained in step f) to a frequency f=0 Hz to obtain the static bending stiffness (C B,stat ) of the object (1).

This invention discloses an XIE beam, comprising a box girder body, which is formed by an upper panel (1), a left web (2), a lower panel (3), and a right web (4). Inside the box girder body are scissor bracing plates (6) and horizontal steel plates (5). The two ends of the horizontal steel plates (5) are connected to the longitudinal midpoints of the left web (2) and the right web (4), respectively. The midpoint of the scissor bracing plates (6) is located at the transverse midpoint of the horizontal steel plates (5). The upper ends of the scissor bracing plates (6) are connected to the longitudinal 1 / 4 points of the left web (2) and the right web (4), respectively, and the lower ends of the scissor bracing plates (6) are connected to the longitudinal 3 / 4 points of the left web (2) and the right web (4), respectively. Compared to traditional box-section beams of the same area, the XIE beam significantly increases the bending stiffness EI without causing web instability.

The invention discloses a similar design method for an underwater vibration table test model of a reinforced concrete rectangular pier. The method comprises the steps of determining geometric similarity constants; determining an elastic modulus similarity constant, a longitudinal bar strength similarity constant, a stirrup strength similarity constant and a water density similarity constant of the reduced-scale pier; determining an acceleration similarity constant of the reduced-scale pier; determining a structural density similarity constant; determining a flexural rigidity similarity constant of the rectangular section of the reinforced concrete pier; determining the wall thickness of the reduced-scale pier with the hollow structure; determining the weight of the bridge pier in unit height and converting the weight into a mass block of an iron block or a lead block with the same weight; determining a longitudinal bar area similarity constant and a stirrup area similarity constant of the reduced-scale pier; and correcting the stirrup area similarity constant and the like. The method provided by the invention can provide a feasible method for similar design of the reinforced concrete rectangular pier model in an underwater vibration table test.

The invention relates to a chopped fiber reinforcement-based modularized paddle main beam structure and a manufacturing method, and relates to the technical field of aircraft parts, the chopped fiber reinforcement-based modularized paddle main beam structure comprises a main beam body used for supporting a paddle, the main beam body is composed of a plurality of module units, the module units are made of chopped fiber reinforced composite materials, and the interior of each module unit is of a hollow structure; the gradient supporting pieces are arranged in the module units, each gradient supporting piece comprises a vertical strip and a transverse supporting strip, the vertical strips and the transverse supporting strips are arranged in a density stepped change mode, and the density of the ends, close to the connecting ends, of the vertical strips and the transverse supporting strips is large; according to the gradient supporting piece, the density stepped change design is adopted, high-fiber-content metal powder or metal powder mixed with the high-fiber-content metal powder is adopted close to the connecting end, and the rigidity, the abrasion resistance and the bolt pre-tightening force resisting capacity are improved; and the middle part adopts a low-density core material for weight reduction, so that the bending rigidity is kept while the overall weight is reduced, and the balance of light weight and high strength is realized.

This application discloses a BIM-based automatic optimization method and system for substation cable laying paths. The method includes: acquiring a building information model; extracting equipment spatial information, equipment operation information, building structural spatial information, and target cable information; constructing the equipment thermal radiation potential energy field and power frequency magnetic leakage potential energy field; determining the cable type and, based on the cable type, determining the magnetic field repulsion response coefficient, thermal radiation repulsion response coefficient, and bending stiffness coefficient; constructing a virtual cable model; constructing an energy coupling function based on the equipment thermal radiation potential energy field, power frequency magnetic leakage potential energy field, magnetic field repulsion response coefficient, thermal radiation repulsion response coefficient, and bending stiffness coefficient; determining the optimal laying path using the energy coupling function; generating a cable spatial constraint potential energy distribution based on the optimal laying path; and determining all optimal laying paths based on the cable spatial constraint potential energy distribution. This application can effectively improve the accuracy of substation cable laying path optimization.

Closure arrangement (10) for covering and closing openings in buildings, roofs, walls, in particular for weather protection, for pergolas, for canopies, for doors, gates and the like, comprising at least one profile arrangement (5, 5'), wherein the profile arrangement (5, 5') has at least one hollow chamber (50, 51) and at least one connecting element (3) and / or at least one connecting device (4), wherein the profile arrangement (5, 5') has at least one structural layer (6), wherein the at least one structural layer (6) has at least a portion of a polymeric material, wherein the profile arrangement (5, 5') has at least one reinforcing insert (7), preferably fully embedded in the structural layer (6), characterized in that the profile arrangement (5, 5') has a bending stiffness about the x-axis of approximately 17 to 29 × 10 9 N / mm 2 , preferably about 18 to 22 × 10 9 N / mm 2according to DIN EN ISO 178-2019-08, the profile arrangement (5,5') has a linear coefficient of thermal expansion α of approximately 12 to 64 × 10 -6 / K, preferably 16 to 30 × according to DIN EN ISO 11359-2:2021-11, having the material of the at least one structural layer (6) comprising microhollow spheres consisting of a plastic shell filled with a gas.

The present application belongs to the technical field of industrial detection, and particularly relates to a forging round steel straightness online detection method based on point cloud data, which comprises the following steps: firstly, obtaining original point cloud and multi-dimensional physical characteristic data of the round steel in a transmission state; then, slicing the point cloud, and combining local geometric missing features and thermal deformation driving features to calculate a compensation step, and correcting a primary centroid to obtain a real three-dimensional physical axis; subsequently, projecting the axis to an orthogonal plane, and using a restriction relationship between local curvature and material bending stiffness to obtain a pseudo-boundary penalty factor, and then correcting an envelope angle and calculating a comprehensive straightness error. The present application eliminates the interference of point cloud missing, thermal eccentricity and surface microscopic defects, and improves the accuracy of the forging round steel straightness detection.

The invention relates to a bending test method for an asphalt mixture composite board. The bending test method comprises the following steps: preparing an asphalt mixture composite board test piece; carrying out heat preservation on the asphalt mixture composite board test piece; placing the asphalt mixture composite board test piece subjected to heat preservation on a clamp, vertically and downwards loading the asphalt mixture composite board test piece at a constant speed, and collecting pressure load and midspan displacement when the test piece is damaged; and calculating the flexural tensile strength, the maximum flexural tensile strain and the bending stiffness modulus. The invention provides a special low-temperature crack resistance test method for a multi-layer asphalt mixture structure.

The application belongs to the field of high-stability anti-deformation folding pallets, and particularly relates to a high-stability anti-deformation folding pallet, which comprises a middle plate, the outer side of the middle plate is hingedly connected with two symmetrically distributed pallet plates, the inner side top of each pallet plate is fixedly installed with a fixing cover, and the inside of the fixing cover is slidably connected with a moving strip. Through the sliding insertion cooperation of the supporting pipe and the locking rod, a multi-point continuous supporting structure is established between the pallet plate and the middle plate, the traditional hinge force transmission mode is changed, the load is directly transmitted, the bending stiffness is significantly improved, the bearing deflection deformation is effectively inhibited, the radial constraint of the supporting pipe by the multiple linearly distributed locking rods and the reinforcing guide plate is cooperated to make the connection part have excellent bending moment capacity, and no cumulative deformation is generated under long-term heavy load or frequent folding, the problems of easy hinge loosening and permanent deformation are fundamentally solved, and the service life of the pallet is greatly prolonged.

This application provides a method, apparatus, storage medium, and electronic device for determining the parameters of an elastic flywheel. The method includes: constructing an optimization model and solving the optimization model based on optimization variables, constraints, and an optimization objective to obtain calculation results. The optimization variables are the number of intermediate diaphragms, the thickness of a single intermediate diaphragm, and the positional relationship between any two intermediate diaphragms. The constraints are the total diaphragm thickness and the minimum strength range of the diaphragms. The optimization objective is to minimize the bending stiffness of the intermediate diaphragms. The target solution of the calculation results includes the target number of intermediate diaphragms, the target thickness of each intermediate diaphragm, and the target positional relationship between any two intermediate diaphragms. This method, while ensuring constant torsional stiffness, flexibly controls bending stiffness and strength by combining the number of diaphragms, diaphragm thickness, and diaphragm arrangement order, thus achieving both high reliability and shaft alignment compensation capability.

The application relates to the technical field of mechanical dynamics, in particular to a fault gear time-varying meshing stiffness calculation method considering crack positions, which comprises the following steps: establishing a gear fault calculation model; determining corresponding crack category information, and pre-storing crack gear section division rules corresponding to the crack category information; detecting a crack position on the gear that has occurred a fault, adopting the crack gear section division rule to divide the crack position into sections to obtain a plurality of crack sub-sections; obtaining the bending stiffness and the shear stiffness of each crack sub-section for each crack sub-section; and summing the bending stiffness and the shear stiffness of each crack sub-section to obtain the bending stiffness and the shear stiffness of the fault gear. The bending stiffness and the shear stiffness of the fault gear can be obtained by inputting the parameters of the crack, and the calculation efficiency is higher.

The invention discloses adjustable dredging equipment, which belongs to the technical field of hydraulic engineering and comprises a pump body and an extension arm. The extension arm comprises two segmental chain belts and two convolution discs, the segmental chain belts only have one-way winding freedom degrees, one ends of the segmental chain belts are matched with the pump body, the other ends of the segmental chain belts can be driven to be wound around the corresponding convolution discs, the two segmental chain belts are oppositely arranged, and the winding freedom degrees are opposite in direction. The segmental chain belt can form a continuous structure with certain axial rigidity in a specific direction when being unfolded, and can be wound and stored around the convolution disc when being retracted, so that the occupied space is small, and a large-range extension distance can be provided for the pump body. The two sectional chain belts can form symmetrical structures which interfere with each other and support each other in an unfolded state, stable truss type support can be formed, enough bending rigidity is provided for the pump body, the swing problem caused by flexible connection is avoided, and the underwater posture stability is improved.

The invention relates to the field of tunnel engineering, in particular to a supergravity test device and a seabed shield segment deformation evaluation and prediction method. The supergravity experimental device comprises a geotechnical centrifuge and a hanging basket provided with a counterweight mass block and a model box, a similar stratum and a shield tunnel model in the similar stratum are arranged in the model box, and a displacement sensor is arranged in the tunnel model; a lead sand counterweight layer is laid at the uppermost end of the similar stratum; and an annular water tank sleeves a rotating shaft of the centrifugal machine and is communicated with the interior of the model box through a water pipe. The seabed shield segment deformation evaluation and prediction method based on the supergravity test device comprises the following steps: accelerating a geotechnical centrifuge to a target centrifugal acceleration, and restoring a prototype stress field; the height of an overlying water layer is dynamically adjusted through a water tank in the running process of the centrifugal machine, and overlying load evolution is simulated; calculating the equivalent flexural rigidity of the tunnel model based on the equivalent flexural rigidity model; deformation data are obtained in real time through a displacement sensor of the tunnel segment, the segment deformation amount is obtained, and the bending moment is solved in combination with the equivalent bending rigidity. The method can truly reproduce the long-term deformation and disaster development law, provides a key basis for early risk identification, structural design optimization and operation and maintenance strategy formulation, and has important significance for guaranteeing the full life cycle safety of the subsea tunnel.

The invention provides a tensegrity module dynamic behavior analysis method based on an energy-preserving matrix perturbation method, which is different from an existing modeling method aiming at a tensegrity structure that a rope and a rod piece are simulated into a rod without considering bending rigidity or both the rope and the rod piece are regarded as beams. The string units are adopted to model the rope, and the actual vibration condition of the structure can be reflected. Taking a three-rod tensegrity structure module unit as an example, firstly, dynamic stiffness matrixes with prestress are established for ropes and rod pieces in the structure respectively; solving the established dynamic stiffness matrix by adopting a W-W algorithm to obtain a structure frequency; and finally, structural response is obtained and verified under the condition of existing frequency, and verification results show that the method has good calculation efficiency on the premise of ensuring accuracy.

The embodiment of the present disclosure provides a spherical wood net shell form finding analysis method based on ANSYS, comprising the following steps: constructing an association table of a net shell structure model and parameter elements, including the net shell structure model and the parameter elements corresponding to the net shell structure model, wherein the net shell structure model comprises a cross-truss system model, and the parameter elements comprise structural physical parameters, material constitutive model, node bending stiffness, initial defect, structural nonlinearity and node semi-steel; obtaining the parameter elements, determining the net shell structure model through the association table according to the parameter elements; determining a constraint condition and a load, performing iterative stress analysis on the net shell structure model, and obtaining an optimized structure model, wherein the constraint condition comprises that the node stiffness of the net shell support should be greater than the node stiffness between the components, and the load comprises a vertical load, and the vertical load comprises a dead load, a snow load and a wind load. The form finding efficiency and accuracy are improved.

The invention belongs to the technical field of structural design and mechanical property analysis, and particularly discloses a dot matrix entity mixed structure and a design method thereof.The method comprises the following steps that an entity structure model and a cubic structure model are constructed and subjected to topological optimization, and an optimized entity structure and a TOPO lattice are obtained; the TOPO crystal lattice and the BCC or FCC regular crystal lattice are geometrically coupled to form a hybrid crystal lattice; embedding the hybrid lattice into a low-density region in the optimized entity structure, and constructing a lattice entity mixed structure; a finite element model is established on the basis of an explicit dynamics platform, three-point bending boundary conditions are applied, load-displacement response and stress distribution of a hybrid structure are analyzed, and then layout and parameters of hybrid lattices and the shape of an entity structure are adjusted according to analysis results. According to the method, collaborative optimization of the bearing capacity, the bending rigidity and the energy absorption efficiency of the structure can be achieved, a systematic simulation verification process is established, and an efficient design basis is provided for engineering application.

The present invention provides a segment that can increase bending rigidity and can be manufactured without causing deformation of the main girder due to the heat of welding. [Solution] By providing a reinforcing member 14 that extends in an arc shape along the circumferential direction of the tunnel within the steel shell formed by each main girder 11, skin plate 12, and joint plate 13, the strength against bending load can be ensured not only by each main girder 11 but also by the reinforcing member 14, and the bending rigidity of the segment 10 can be significantly increased. In this case, the outer flange 14a and inner flange 14b of the reinforcing member 14 are arranged in a non-joined state to the main girder 11, so it can be manufactured without causing distortion or deformation of the main girder due to the heat when welding flange members to increase bending rigidity as in the conventional method, and accurate external dimensions can always be ensured.

The present application belongs to the field of bridge health diagnosis, and discloses a bridge bending stiffness distribution sensing method. A bridge bending stiffness distribution sensing device is installed along the bridge direction on the bridge girder. The bridge bending stiffness distribution sensing device measures the equivalent strain field distribution after the bridge deformation in the process of the trolley passing through the bridge. Then, the bridge bending stiffness distribution reconstruction is realized by combining the sensing method. The present application combines the advantages of simple strain measurement and the characteristics of deflection sensitivity to the bridge bending stiffness distribution. The bridge bending stiffness distribution reconstruction can be realized by only using the measured strain information of the sensing device, and the present application has the advantages of low cost, simple measurement, strong practicability and the like.

The application belongs to the field of bridge health monitoring and rapid detection, and discloses a bridge bending stiffness identification method based on multi-point deflection influence line input, and steps are as follows: firstly, a linear model for solving bending stiffness is established by using measured deflection influence lines at multiple positions of a bridge and linear elasticity theory; then, a redundant dictionary composed of multiple types of global basis functions is used for sparse representation of the bending stiffness distribution curve, and the bending stiffness reconstruction problem is converted into a sparse vector solving problem; finally, a sparse vector solution model with 1-norm regularization constraint is established, and the optimal bending stiffness distribution is obtained by solving the model. l The application can realize continuous bending stiffness curve solving by using multi-point measured deflection influence lines only, is suitable for stiffness evaluation of statically indeterminate in-service bridges such as continuous girder bridges, and has the advantages of strong applicability, high solving efficiency and strong robustness.

An anisotropic composite material assembly comprising a first layer with a tensile modulus different from its compressive modulus and that exhibits variable modulus behavior. The first layer elastically buckle under compressions. A second layer has a tensile modulus substantially the same as its compressive modulus. The first and second layers are joined together, and the assembly is bendable in a first direction with an outer surface of the first layer being in compression and the assembly has a first bending stiffness during bending in the first direction. The assembly is bendable in a second direction opposite the first direction with the outer surface of the first layer being in tension, and the assembly has a second bending stiffness greater than the first bending stiffness during bending in the second direction.

The invention relates to the technical field of measurement, particularly provides a method for determining rigidity parameters of a flexible body and a method for correcting a flexible body simulation model, and aims to solve the problem that physical attributes such as bending rigidity and torsional rigidity of the flexible body cannot be measured by an existing flexible body form measurement technology. In order to achieve the purpose, the method for determining the rigidity of the flexible body comprises the steps of reconstructing a three-dimensional center line of the flexible body based on a multi-view image of the flexible body in a mechanical arm clamping state; acquiring deformation rate information of the three-dimensional center line distributed along the arc length; based on a sensor arranged on the mechanical arm, stress information of the flexible body in the clamping state of the mechanical arm is collected; and determining deformation rigidity information of the flexible body based on the deformation rate information and the stress information.

A system and method for monitoring the safety of a double-rocker arm gantry structure are disclosed. The monitoring method includes: Step 1: Measuring the lengths of the rocker arms on both sides of the double-rocker arm gantry, generating a standard unbalanced moment using a standard slewing support specimen, and calibrating the bending stiffness of the slewing support; Step 2: Installing a first angle sensor and a second angle sensor on the rocker arms on both sides of the gantry, installing a first strain gauge sensor and a second strain gauge sensor at symmetrical positions on both sides of the slewing support, and installing tension sensors on the lifting hooks of the left and right rocker arms respectively. This invention utilizes strain gauge sensors and tension sensors to calculate the torque difference between the two rocker arms and record the strain of the slewing support rod, thereby reducing the size of the monitoring equipment and enabling real-time and convenient monitoring of the safety of the gantry structure.