62 results about "Constant load" patented technology

The invention discloses a production method of thick-wall pipeline steel X65MS for polar regions, which adopts ultra-low carbon and high Ni + casting blank secondary cogging extreme cooling + steel plate online ultrafast cooling, breaks the component design of the conventional pipeline steel standard, solves the problem of poor drop hammer low-temperature toughness of thick-wall acid-resistant pipeline steel at-55 DEG C, and has the transverse and longitudinal yield strength of 460-560MPa, the tensile strength of 590-650MPa, the yield ratio of less than or equal to 0.80, the tensile strength of 590-650MPa and the tensile strength of less than or equal to 0.80. The uniform elongation is 10%-12%, the impact value at-55 DEG C is 400-500 J, and the drop weight at-55 DEG C is 90%-95%; when the product is soaked in an NACE solution for 96 hours in an HIC test, CLR, CTR and CSR are all 0; sSC test: four-point bending constant load nominal yield is 90%, and the sample is soaked for 720 hours, and the surface of the sample has no crack; the CTOD value of the crack tip opening displacement of the CTOD test material at-55 DEG C is greater than or equal to 0.6 mm.

The invention relates to physical sample preparation equipment and method for an inner wall eccentric wear sleeve, and the physical sample preparation equipment for the inner wall eccentric wear sleeve comprises a rotatable main shaft, and the outer side wall of the main shaft is sleeved with a grinding wheel structure; the sleeve is arranged on the outer side of the main shaft in a sleeving mode, and the axial direction of the sleeve is parallel to the axial direction of the main shaft; the first driving device is connected with the main shaft and can drive the main shaft to rotate; the second driving device is connected with the sleeve, can drive the sleeve to move in the radial direction so as to make contact with the grinding wheel structure, can apply a preset constant load to the sleeve, and can further drive the sleeve to continue to move in the radial direction in the process that the sleeve makes contact with the grinding wheel structure to generate frictional wear; and the sleeve and the grinding wheel structure are kept in a contact state under the action of the preset constant load, so that an eccentric wear groove is formed in the inner wall of the sleeve. According to the invention, the problem of lack of preparation of an eccentric wear sleeve material sample with a crescent-shaped inner wall in the prior art can be solved.

The application provides a cement industry load production optimization scheduling method considering the adjustability of a rotary kiln, and belongs to the technical field of cement industry load production optimization scheduling; in order to solve the defects that the rotary kiln is generally regarded as a constant load and the adjustable potential is ignored in the existing cement industry load, the technical scheme is that: the rotary kiln is modeled by combining mechanism and data, the adjustability is verified, and a mechanism model of the coupling relationship between the rotary kiln temperature and the materials of the front and rear production links is constructed on the basis of energy conservation and mass conservation; then, the model parameters are identified by using the historical operation data of the rotary kiln, and the mechanism interpretability and data accuracy are considered; finally, the whole cement production process is summarized as multiple continuous links by taking a state task network as a framework, each link corresponds to a node, and the cement industry load production optimization scheduling is realized through material balance, start-stop and storage constraints; the application is applied to cement production control.

The invention relates to the technical field of testing, and provides an actuator loading testing device which comprises a hydraulic oil cylinder, a reversing valve, a hydraulic pump, a motor, a first ball valve, a second ball valve, a proportional overflow valve, an electromagnetic overflow valve and a controller. The controller is used for controlling the first ball valve, the second ball valve, the reversing valve, the electromagnetic overflow valve or the proportional overflow valve according to the oil inlet and outlet pressure of the first cavity A and the second cavity B of the hydraulic oil cylinder so as to test the actuator. The device not only can carry out a tension test of the actuator, but also can carry out a thrust test of the actuator, not only can carry out a variable and constant load test of the actuator, but also can keep the load force unchanged when the actuator moves so as to carry out a constant load test of the actuator and cover a full working condition test of the actuator, and the whole device is loaded by a hydraulic system, so that the test efficiency is improved. High load can be obtained by increasing system pressure, and the whole device is safe and reliable.

A kind of thick-wall acid-resistant pipeline steel X65MS hot rolling process method, the chemical composition of steel is as follows: C=0.03%~0.04%, Si=0.2%~0.4%, Mn=1.0%~1.2%, Cr=0.2%~0.4%, Cu=0.2%~0.3%, Ni=0.1%~0.4%, Mo=0.10%~0.25%, Nb=0.03%~0.04%, Ti=0.01%~0.015%, Ce=0.004%~0.006%, S≤0.004%, P≤0.008%, the balance is Fe and inevitable impurities;Production is carried out using continuous casting billet with thickness of 360mm and above, and the finished product thickness is 40~55mm;Three-stage rolling process and the matched intermediate billet cooling and post-rolling ultra-fast cooling process are used, the obtained pipeline steel has CLR≤10%, CSR≤1%, CTR≤1% in hydrogen-induced cracking (HIC) experiment under the condition of NACE solution immersion for 96 hours;In sulfide stress corrosion cracking (SSCC) experiment, no crack is found under the condition of four-point bending constant load nominal yield of 90% for 720 hours.

The present application relates to compressor online detection technical field, provide a kind of compressor online detection equipment and compressor online detection method.The compressor online detection equipment includes: stabilized power supply, with the compressor to be measured is connected;Suction stabilized component is connected in the suction pipeline of the compressor to be measured, for adjusting the suction pressure of the compressor to be measured;Exhaust stabilized component is connected in the exhaust pipeline of the compressor to be measured, for adjusting the exhaust pressure of the compressor to be measured, so that the compressor to be measured has exhaust pressure constant load operating phase;And acquisition device, with the compressor to be measured is connected, for acquiring the operating parameter of the compressor to be measured in the load operating phase.The present application can realize the flexible, stable, accurate detection of the operating parameter of the compressor to be measured, meet the test demand of the compressor to be measured.

The present application relates to the technical field of plate performance testing, and particularly relates to a kind of plate edge durability test method;It comprises the following steps: cutting plate sample into standard size test piece;Using thermal mechanical analyzer respectively test the linear expansion coefficient of test piece edge material and base material;The test piece after processing is placed in environmental test chamber and is subjected to cyclic test;Test piece is fixed on load testing device, and constant load is applied along the direction perpendicular to the edge interface of plate plane;Using flatness tester to measure the overall warping of test piece, compare with the warping data before testing, calculate the warping change, evaluate the actual effect of plate balanced laminating process on preventing warping after edge sealing;Using weighted scoring method to calculate the comprehensive score of edge durability;Realize that the long-term durability of plate edge sealing under complex working conditions can be comprehensively and accurately evaluated, and provide scientific and comprehensive technical support for edge sealing process optimization, material selection and structure design.

A microgrid controller of a microgrid includes a communication interface configured to receive load information corresponding to a current load demand of a plurality of loads connected to the microgrid and output control signals for controlling energy resource systems associated with the microgrid, which include a non-stabilizing group and a stabilizing group; and one or more processors, coupled to the one or more memories, configured to execute a load stabilization algorithm to generate the one or more control signals based on the load information. Executing the load stabilization algorithm includes generating, based on the load information, one or more first control signals to dynamically control an amount of total output power provided by the stabilizing group to a power distribution network of the microgrid in order to stabilize one or more cyclic loads on the power distribution network and to maintain the non-stabilizing group at a substantially constant load.

This invention discloses a simulation method, apparatus, equipment, and medium for an electromagnetic railgun. Compared to constant load parameter values, it employs a finite element method combined with equivalent circuit analysis. The rail is divided into N segments, and the armature is positioned at the end of the i-th segment. The current equivalent load parameters of the rail are updated based on the circuit parameters at each discrete time point, thereby approximating the true value of the equivalent load parameters segment by segment. The current equivalent load parameters are then substituted into the circuit and mechanical equations to calculate the discrete data when the armature is positioned at the end of the i-th segment. If i < N, let i = i + 1, and iterate the above simulation steps; if i = N, then fit all the calculated discrete data between the armature velocity and discrete time points to obtain continuous data between the armature velocity and time. It is evident that this invention corrects the equivalent load parameters whenever the armature moves a certain distance, thus simulating an electromagnetic railgun firing process that more closely approximates the real situation.

The invention discloses a method for controlling the fatigue life of a forged aluminum alloy hub, and belongs to the technical field of automobile hub manufacturing. The method is characterized by comprising the following steps: 1) under the conditions that the action of other external forces on a hub is not considered and the loading of a load spectrum is constant, the fatigue life of the hub is controlled by controlling an applied load according to real stress and controlling the amplitude of the real stress and a constant load ratio; and 2) according to fatigue simulation of the forged aluminum alloy hub, directly determining the relationship among the real stress amplitude delta sigma, the load ratio R and the fatigue life N. The method has the advantages that the fatigue life of the forged aluminum alloy hub can be controlled by controlling the actual stress amplitude and the application of the load ratio, the fatigue life is calculated according to the actual stress amplitude and the load ratio, the fatigue life of the forged aluminum alloy hub is accurately controlled, and the anti-fatigue performance of the forged aluminum alloy hub is effectively controlled.

The application provides a method and device for determining a bridge closure position based on a first-stage dead load internal force distribution and a storage medium, and relates to the technical field of bridge construction. The method comprises the following steps: obtaining a candidate closure position of a target bridge; performing a first-stage dead load stress state analysis based on a pre-established full-bridge finite element model to obtain a first-stage dead load internal force state analysis result; calculating a construction convenience index, a construction period index, an adjustment measure index and other influence factor indexes according to the influence of the target bridge based on the first-stage dead load internal force state analysis result; calculating a closure index of each candidate closure position based on the construction convenience index, the construction period index, the adjustment measure index and the other influence factor indexes; and taking the candidate closure position with the minimum closure index value among all the candidate closure positions as the target closure position. The method provided by the application can quickly and effectively determine the bridge closure position.

The invention discloses a bevel gear power closed transmission system variable speed loading optimization method, and belongs to the field of gear transmission system loading test method optimization. The problem that according to an existing variable speed loading method, constant load loading or simple program control step loading exists, and consequently loading time is long is solved. According to the method, the dynamic characteristics of the bevel gear closed power system are analyzed, and a novel dynamic characteristic value is calculated by collecting a vibration signal and a vibration acceleration signal of the system. The optimal test loading sequence is determined by ingeniously applying a quantum particle swarm optimization method, and the method is mainly applied to the bevel gear power closed loading test.

This invention relates to the field of fatigue performance enhancement technology for metallic materials, and more particularly to a method for improving the fatigue performance of notched components in high-temperature metallic structural materials. Addressing the problem of fatigue failure in notched components of high-temperature metallic structural materials under alternating loads, this invention proposes a method to improve their fatigue performance through pre-creep treatment. This invention applies a controlled constant load or constant stress to the notched component at high temperature and maintains it for a certain period, causing controllable creep at the notch root. This achieves stress relaxation and redistribution, forming a favorable residual stress state and / or microstructure, weakening the notch effect and improving fatigue life. This method has good versatility and can be applied to different types of metallic structural materials, especially suitable for high-temperature fatigue-related components under complex service environments.

The invention provides a support pre-pressing construction method, and relates to the field of bridge engineering. The method comprises the following steps: laying a bottom die after a bracket is accepted and accepted, and pre-pressing by adopting a sandbag (the weight is greater than or equal to 1.2 times of dead load of a box girder, and the pre-pressing period is greater than or equal to 14 days); loading in four stages until the total weight is 30%, 60%, 100% and 120%, observing every 8 hours after loading in each stage, and carrying out the next stage when the settlement difference is less than or equal to 2mm for three times continuously; after loading is completed, observing to be qualified, and unloading in a grading manner according to a principle of loading first and unloading second; the deformation is calculated according to the pre-pressing data, the elevation and the pre-camber of the formwork are adjusted, and finally the supporting system is reinforced; the safety of the support can be verified, inelastic deformation is eliminated, a basis is provided for pre-camber setting, and the construction quality and safety of the box girder are improved.

This invention belongs to the field of materials testing technology and discloses a device and method for testing the hydrogen content of metallic materials. The testing device includes a reaction vessel and multiple constant-force loading structures. The reaction vessel surrounds a fixed chamber filled with test gas and electrolyte solution. The multiple constant-force loading structures are located in the fixed chamber. Each constant-force loading structure includes a clamp assembly and a loading assembly. The clamp assembly includes a first clamp and a second clamp, with the second clamp having a blank test position. The loading assembly includes a first pull rod, a rotating nut, and an elastic element. Tightening or rotating the nut applies a load to the loaded sample. By precisely controlling the deformation of the elastic element, the load applied to the loaded sample can be ensured to accurately reach a preset value, achieving precise control of the constant load to test the hydrogen embrittlement sensitivity of the sample under different load conditions. The multiple constant-force loading structures can simulate various different load conditions, facilitating simultaneous parallel comparison tests under multiple conditions and improving testing efficiency.

The invention discloses a large-span arch bridge live load bending stress active control method based on an influence matrix, and relates to the technical field of bridge engineering, and the method comprises the steps: constructing a refined finite element model containing material and geometric nonlinearity; a dead load-long-term effect influence matrix is constructed, and the initial adjustment amount of the closure gap enabling the total bending moment decreasing amplitude to be larger than or equal to 30% is solved; a typical live load working condition and a control target are determined; constructing a live load bending stress control influence matrix, solving the additional adjustment amount, and superposing the initial adjustment amount to obtain the optimal adjustment amount of the closure gap; in the construction stage, the optimal adjustment amount of the closure gap is achieved by adjusting the cable force of the buckle cable, and the actual bending stress of the control section under each typical live load working condition is monitored and verified on site after the bridge is formed. According to the method, full-load collaborative optimization can be achieved, the consumption of main arch materials is reduced, the method is suitable for multiple types of arch bridges, and control precision, engineering practicability and economical efficiency are considered.

The application discloses a kind of compaction bulk filling material resistivity characteristic testing device, belong to geotechnical engineering and mining engineering technical field, including bulk filling material compaction unit and resistivity test unit;Compaction unit can realize the constant load compaction of bulk filling material, and the target compaction state of sample is maintained by locking clamp, to avoid unloading rebound;Resistivity test unit can realize the axial height adjustment of test probe and the adjustment of different angles of compaction box circumference, without transferring sample to complete the resistivity in-situ test of different compaction states, different spatial positions.The application realizes the integration of bulk filling material compaction and resistivity test, solves the problems of sample disturbance, compaction state and test working condition mismatch, incomplete test dimension in the prior art, and can accurately obtain the correlation between bulk filling material compaction degree and resistivity, to provide reliable experimental data support for resistivity detection of goaf filling body density.

Provided is a biodegradable three-dimensional network structure having excellent compression recoverability and repeated compression characteristics after thermal compression at a use ambient temperature. A three-dimensional network structure having a three-dimensional random ring-bonded structure, the three-dimensional network structure being characterized in that the continuous lines are formed from a thermoplastic resin composition, and the thermoplastic resin composition contains 70 mass% or more of a poly (butylene adipate-co-terephthalic acid) resin, and the thermoplastic resin composition contains a polybutylene adipate-co-terephthalic acid) resin, the polybutylene adipate-co-terephthalic acid resin, and the polybutylene adipate-co-terephthalic acid resin. In a differential scanning calorimetry curve of the continuous lines measured using a differential scanning calorimeter, the enthalpy of an endothermic peak having a minimum value in the range of 30 DEG C to 70 DEG C is 2.5 J / g or less, and the average fiber diameter of the continuous lines is 0.1 mm to 3.0 mm (inclusive). The average fiber diameter of the surface layer part of the three-dimensional network structure is 1.05 times or more of the average fiber diameter of the inner layer part, the apparent density of the three-dimensional network structure is 0.01-0.20 g / cm3, the residual strain after repeated compression at a constant load of 750 N is 15% or less, and the hardness retention rate at 40% compression after repeated compression at a constant load of 750 N is 45% or more.

The application discloses a kind of decreasing type transient variable load loading device and test method, it is related to loading test simulation technical field.The application includes: first sliding mechanism, first slider is configured with linear sliding along first direction;Second sliding mechanism, second slider is configured with linear sliding along second direction;Constant load force mechanism is used to output constant load parallel with first direction, and load acts on the first slider;The first direction is vertically arranged with the second direction, the first slider is connected with the second slider by inclined connecting rod, the second slider is connected with the product to be measured on the side away from the first slider, the distance between the hinge point of the connecting rod and the first slider and the hinge point of the connecting rod and the second slider in second direction is less than the length of the connecting rod;Overcome the shortcomings of existing variable load loading system structure, small loading range, slow response, realize the purpose of instantaneous decrease of load.

The invention discloses a constant load supporting mechanism, a stirrer and a system, and the device comprises a fixed supporting device which is provided with a lifting device; the power output device is connected with a pressure output device through an adjusting device, a pressure adjusting piece is installed on the pressure output device, and the pressure output device is connected with the lifting device; wherein when the operation equipment is supported, the lifting device is installed below the operation equipment, and by presetting operation parameters of the power output device, the lifting device supports the operation equipment in a self-adaptive mode according to displacement changes of the operation equipment. According to the mechanism, the displacement problem between the supported mechanical equipment and the supporting device can be converted into the pressure problem, the height and the supporting force of the lifting device are adjusted in a self-adaptive mode according to the displacement change of the mechanical equipment, and the stability and the safety of the mechanical equipment under different working conditions are guaranteed; the defect of excessive support or incapability of supporting due to descending of a support foundation or frequent change of the position of a support object is overcome.

The invention relates to an output adaptive adjustment control method, a switching power supply and a coating process, and aims to ensure that the process energy value output by each batch of production can reach the target process energy value under different load fluctuations by monitoring the output process energy value and the accumulated process duration in real time and dynamically adjusting the output power value. And stable product quality is ensured, and batch consistency under a non-constant load is realized. When the output power value is adaptively adjusted, it is ensured that the accumulated process duration is consistent with the target process duration, it is avoided that the accumulated process duration is prolonged due to pause of output, and it is ensured that a production plan is advanced on time and the process duration is accurate and controllable. By setting various pause conditions and corresponding pause durations and combining the adjustment coefficient to dynamically calculate the output power value, the method is suitable for industrial scenes with frequent load change, such as sputter coating and induction heating. In sputtering coating and other processes where electric arcs are prone to being generated, different types of electric arcs can be rapidly recognized and responded, and the influence of process interruption on coating quality is reduced through short-time pause and power compensation.

The present application relates to air separation device system control technical field, specifically disclose a kind of automatic constant load control method of air separation device, material balance module system air transparent guide vane tracks raw material air flow of purification system, editing module system controls air transparent guide vane constant purification system processing air volume;Editing module system controls oxygen production regulating valve to track actual oxygen flow;3) editing module system controls nitrogen production regulating valve to track the oxygen, nitrogen multiple of actual oxygen flow;Editing module system controls dirty nitrogen production regulating valve to track actual dirty nitrogen flow;Expansion air volume tracks oxygen production or processing air volume editing module control expander nozzle opening and bypass valve, adjust expansion air into upper column processing air volume and bypass air volume;Process argon flow regulating valve tracks process argon flow editing module system control;The present application does not independently unit configuration automatic load variation system with additional investment, realizes processing air volume and output balance prediction, material balance.

The invention relates to the technical field of rail transit, in particular to a rail alignment adjustment control method based on regression technology, comprising the following steps: S1, acquiring JS0; measuring CS1; s2, applying a second-stage constant load P and a T0-T1 temperature difference effect to obtain JS1; s3, verifying JS1 and JS0, and if JS1 and JS0 do not accord with each other, returning to S2; s4, after the second-stage dead load is laid, CS2 is measured, the T0-T2 temperature difference effect is overlaid on CS2, and JS2 is obtained; s5, verifying the JS2 and the JS0, and if the JS2 and the JS0 do not meet the requirements, returning to S2; s6, measuring DY; s7, the temperature T3 is measured, the T3-T2 temperature difference effect is superposed on the CS2, and JS3 and GS1 are obtained; fitting the GS1 by using a multiple regression technology to obtain GS2; s8, calculating the DH, and if the DH does not meet the requirement, returning to the step S2; and S9, steel rail fine adjustment operation is carried out. According to the method, structure manufacturing errors and environmental interference are effectively eliminated, the multiple regression fitting technology is introduced, the calculation process is simplified, the linear adjustment difficulty is reduced, and the steel rail fine adjustment precision is improved.

The invention discloses a progressive decreasing type instantaneous variable load loading device and a test method, and relates to the technical field of loading test simulation. The present invention comprises: a first sliding mechanism configured with a first slider that linearly slides in a first direction; the second sliding mechanism is provided with a second sliding block which linearly slides in the second direction; the dead-load force applying mechanism is used for outputting a constant load parallel to the first direction, and the load acts on the first sliding block; the first direction is perpendicular to the second direction, the first sliding block and the second sliding block are connected through an inclined connecting rod, and the side, away from the first sliding block, of the second sliding block is connected with a product to be tested. The distance between the hinge point of the connecting rod and the first sliding block and the hinge point of the connecting rod and the second sliding block in the second direction is smaller than the length of the connecting rod. The defects that an existing variable load loading system is complex in structure, small in loading range and slow in response are overcome, and the purpose of instantaneous decreasing change of loads is achieved.

The invention provides a cement industry load production optimization scheduling method considering adjustability of a rotary kiln, and belongs to the technical field of cement industry load production optimization scheduling. In order to overcome the defects that the rotary kiln is generally regarded as a constant load and the adjustable potential of the rotary kiln is neglected in the existing cement industry load, the adopted technical scheme is as follows: modeling is performed on the rotary kiln by adopting a mechanism and data combination mode, the adjustability of the rotary kiln is verified, and the rotary kiln is constructed on the basis of energy conservation and mass conservation. Constructing a mechanism model of the coupling relationship between the temperature of the rotary kiln and the materials in the previous and later production links; secondly, identifying model parameters by utilizing historical operation data of the rotary kiln, and considering mechanism interpretability and data accuracy; and finally, summarizing the whole cement production process into a plurality of continuous links by taking the state task network as a framework, enabling each link to respectively correspond to a node, and realizing cement industry load production optimization scheduling through constraints such as material balance, start-stop and storage. The method is applied to cement production control.

The invention discloses a device and method for maintaining a load position unchanged, the device comprises lower telescopic units, a box body, a rope, a side edge steering unit, a center switching mechanism, an upper telescopic unit and a fixing clamp, the fixing clamp used for clamping the rope is installed in the middle of the bottom end of the box body, and a plurality of lower telescopic units are installed at the bottom end of the box body; a plurality of lower telescopic units are installed on the top of the box body and distributed in an array mode, a center switching mechanism is installed in the middle of the box body, a plurality of upper telescopic units are installed on the top of the box body and distributed in an array mode, and side edge steering units are installed on the two sides of the top of the box body. The device is suitable for the transmission balance test on the single crystal furnace, and is also suitable for occasions where the upper end is continuously lifted, the load weight is increased and the position is not changed, the load does not need to be designed to be equal to a crystal silicon rod in length or equal to a furnace body in diameter, and space conflicts between the load and the furnace body and between the load and an auxiliary chamber are avoided.

The utility model relates to a creep test device for a dislocation belt, which is used for carrying out a shear creep test of a test piece in a test hole and obtaining creep parameters of the dislocation belt, the creep test device for the dislocation belt comprises a normal loading mechanism, a tangential loading mechanism and a deformation monitoring acquisition system, the normal loading mechanism is longitudinally arranged at the top of the test piece, and the tangential loading mechanism is arranged at the bottom of the test piece. The normal loading mechanism is configured to apply a preset normal constant load to the test piece; the tangential loading mechanism is transversely arranged at one end of the test piece, and the tangential loading mechanism is configured to apply a stepped change tangential load to the test piece; the deformation monitoring and acquisition system comprises a punctuation point, a normal dial indicator, a tangential dial indicator and a deformation data acquisition module, the punctuation point is arranged on the side surface of the test piece, and the normal dial indicator and the tangential dial indicator are in data connection with the deformation data acquisition module and are respectively used for acquiring normal and tangential displacement information of the punctuation point. The creep test device for the dislocation belt can be used for carrying out a creep test on site, and is simple in structure and high in feasibility.

The invention discloses a concrete center drawing test piece constant load stress test device and method. The device comprises a base, a positioning guide column, an upper panel, a driving assembly, a protection monitoring assembly and an anchoring steel pipe, the base is fixedly connected with a plurality of positioning guide columns, and the upper panel can vertically and movably sleeve the positioning guide columns along the positioning guide columns; through the self-balancing loading frame formed by the base, the positioning guide column, the upper panel and the two groups of driving assemblies, the upper panel is enabled to move along the positioning guide column in a pure vertical manner and is synchronously driven, so that a completely closed self-balancing force flow path is formed; therefore, the problems of load attenuation and eccentricity caused by deformation of a reaction frame or lateral interference of a traditional device are thoroughly solved, constant load fluctuation can be controlled within 1% in a long-term test, and the stability and precision of load maintenance are remarkably improved. And a reliable loading basis is provided for long-term research on the bonding performance of the fiber reinforced polymer bar and the concrete.

The application discloses a system for automatically analyzing and calculating constant load of S3D electrical support, relates to the technical field of constant load of electrical support, and discloses an implementation method for automatically analyzing and calculating constant load of S3D electrical support. The system for automatically analyzing and calculating constant load of S3D electrical support has a complete error reporting and exiting mechanism and is robust. Meanwhile, the system can perform design checking on a design model during the process of calculation and analysis, thereby improving the design quality of the bridge support and the design model of the pipe arrangement.

The invention discloses a method for analyzing the section bearing capacity of a large-span arch bridge under dead load leading, and relates to the technical field of bridge engineering.The method comprises the steps that firstly, the failure mode of the large-span arch bridge under a positive and antisymmetric deformation mode is analyzed, and the eccentric limit when the section of the large-span arch bridge is damaged under the high axial force level is judged; secondly, large-span arch bridge in-plane bearing capacity damage experiment research is carried out, and weak links and a control section of an arch structure are defined; and finally, further analyzing and determining influence factors of the in-plane bearing capacity of the large-span arch bridge based on a refined simulation model verified by a test. Through integration of theoretical derivation, test verification and analogue simulation, a stress mechanism and a failure law of the large-span arch bridge in positive and antisymmetric deformation modes are systematically analyzed, the section bearing capacity is accurately calculated, and the design is optimized; according to the method, the problem of a traditional equivalent beam column method overestimation bending moment nonlinear effect is solved, accurate analysis of the cross section bearing capacity of the large-span arch bridge is achieved, and technical support is provided for efficient design of the large-span arch bridge.