159 results about "Static force" patented technology

A true triaxial time-dependent dynamic disturbance test device for a deep-buried hard rock includes a rigid static load loading assembly and a rigid dynamic load loading assembly. The rigid static load loading assembly applies a static load to a rock test sample, and the rigid dynamic load loading assembly applies a disturbance stress to the rock test sample. Coupled application and control of a long time-dependent static force and a disturbance stress of the rock in a true triaxial disturbance stress state are achieved. The rigid dynamic load is provided with a disturbance rod in a loading direction, and a “point” disturbance mode is converted into a “face” disturbance mode through the disturbance rod, a disturbance hole and a test sample clamp, so that a disturbance mode more suitable for an actual working condition on site is provided while power consumption is reduced and time-dependent dynamic disturbance is achieved.

The invention relates to the technical field of structural design and strength evaluation of nuclear fusion devices, and discloses an elastic-plastic analysis and strength verification method, device and equipment under multiple working conditions and a medium. Firstly, basic parameters, unit partitions and conditional constraints of a target structure are obtained; next, based on basic parameters, unit partitions and conditional constraints, static nonlinear solution is carried out, a target data set and a load-displacement curve are obtained, different stress stages are abstracted into a continuous gravity loading path, the strength and deformation of multiple working conditions are synchronously evaluated through a set of elastic-plastic analysis process, and the dynamic performance of the gravity loading path is improved. The method is not limited to linear elasticity checking calculation of a single working condition any more, and the actual stress state of the structure is reflected more truly. Then, an allowable gravity amplification factor is determined based on the load-displacement curve. Further, a safety strength elastoplasticity result and a high-risk region are determined based on an allowable gravity amplification coefficient, a target data set, and a load-displacement curve. And finally, based on the high-risk area and a preset reinforcement rule, obtaining a reinforcement scheme.

The invention relates to the technical field of beam bridge splicing, in particular to a large-span concrete continuous beam bridge splicing construction method based on intelligent construction. The method comprises the following steps: acquiring digital modeling data of a left bridge and a right bridge to be spliced; analyzing the digital modeling data, and determining the dynamic stress distribution of the whole construction process; acquiring deformation monitoring data in real time, analyzing the deformation monitoring data, and determining a coordinated deformation rule of the left and right bridges; and generating a splicing construction scheme according to the dynamic stress distribution and the coordinated deformation rule. And the decoupling problem of a digital model and a physical entity is eliminated. The problem of stress control blind areas is solved, stress space-time evolution is quantified, it is ensured that stress prediction covers all stages of construction, and the blind areas of a conventional static model are avoided. The problem of quantitative deficiency of the coordination deformation rule is solved, and the defect of neglecting the deformation coordination is avoided. The problem of construction decision lag is solved, the structural damage probability and temperature cracks are reduced, and coupling of construction execution and a physical mechanism is ensured.

The invention discloses a structural vibration reduction topological optimization design method based on anti-resonant frequency constraint. The method comprises the following steps: constructing a finite element model corresponding to structure parameters; obtaining an initial structure and an optimization column formula according to the finite element model; obtaining an objective function value through finite element analysis; obtaining an anti-resonance frequency correlation characteristic value through generalized asymmetric characteristic value analysis; and the design variables are updated in combination with optimization column constraints, and a topological optimization design configuration is obtained after convergence judgment. According to the method, explicit calculation and precise control of the dynamic compliance anti-resonant frequency are achieved, optimization and advanced convergence are avoided through anti-resonant frequency constraint, a clear vibration reduction topological configuration can be obtained under high-frequency excitation without additional mass, the vibration reduction performance and the static force bearing capacity of the structure are both considered, and the method is suitable for large-scale popularization and application. And the design requirements for light weight and high vibration attenuation of the structure in the fields of aerospace and the like are met.

The invention belongs to the technical field of bridge engineering, and particularly relates to an analysis method for intelligently sensing a hanging basket of a corrugated steel web box girder bridge, a terminal and a storage medium, and the method comprises the steps: obtaining deformation data of a plurality of measurement points installed on the hanging basket of the corrugated steel web box girder bridge in an actual asynchronous method construction process; establishing an initial finite element model based on the geometric information of the hanging basket structure, and setting an elastic constraint condition at each support position of the initial finite element model; according to the invention, the static level gauge, the inclinometer and the strain gauge are arranged at the key positions of the hanging basket to construct a multi-source sensing monitoring network, so that the cooperative sensing of the vertical displacement, the inclination attitude and the structural strain is realized, and the comprehensiveness and accuracy of the state sensing in the construction process are effectively improved. Secondly, a vertical spring unit is introduced into the finite element model to serve as elastic constraint, the vertical compression deformation behavior of the corrugated steel web under the load effect is truly simulated, and the physical authenticity of boundary conditions is remarkably improved.

The utility model discloses a vertical vibration reduction support based on piezoelectric energy consumption for bridge engineering, which comprises a base plate, a lower seat plate arranged in the base plate, a middle seat plate arranged on the lower seat plate, an upper seat plate arranged on the middle seat plate, and a vibration reduction disc arranged in the base plate and used for vertical vibration reduction. The upper end of the damping disc makes contact with the lower seat plate, a piezoelectric energy dissipation assembly is arranged between the damping disc and the base plate, the damping disc is in an arch shape, the arc face of the damping disc is connected with the pressure bearing block, and the plane of the lower end of the pressure bearing block is connected with the piezoelectric energy dissipation assembly. The vibration reduction disc is made of a spring steel material and adopts an arch-shaped structure, so that stable vertical support can be provided for an upper structure under the action of static force. Vibration reduction and energy consumption of the vertical support are achieved through the piezoelectric energy consumption assembly, the piezoelectric energy consumption assembly converts high-frequency vibration mechanical energy of the support into electric energy through the two piezoelectric ceramic plates, the energy consumption efficiency is high, the working temperature range is wide, and the adaptive capacity is high.

The invention belongs to the technical field of low-frequency vibration control, and discloses a low-frequency low-damping tuned mass damping device which is mainly composed of a rigid support, a first sling, a rotating arm, a cable hole, a first arc guide groove, a second arc guide groove, a lock pin, a second sling, a first mass block, a spring, a second mass block and a damping element. The flexible suspension rotation replaces the bearing or ball screw support, so that the damping is obviously reduced; the long rotating arm is combined with the equivalent large-diameter arc guide groove, so that the low-frequency low-damping tuned mass damping device can achieve large vertical displacement at a small rotating angle, and damping is reduced. The low-frequency low-damping tuned mass damping device innovatively adopts double-mass-block configuration, so that static force borne by a spring is generated by mass difference, and static deformation of the spring is remarkably shortened. According to the method, low-frequency operation can be achieved under the condition that the space is limited, the low-damping characteristic is kept, it is guaranteed that the requirement for the optimal damping ratio is met, and therefore a new technical approach is provided for control over low-frequency vortex vibration of a large-span bridge.

The invention relates to a rotor six-force-element loading method and device for a static test of a tilt-rotor aircraft. The testing device comprises a rack, a plurality of fixed pulleys installed on the rack, a motor fake part fixedly connected with a to-be-tested machine arm, a connecting rod system fixedly connected with the rotating end of the motor fake part, and a rope system, wherein one end of the rope system is connected with the connecting rod system, and the other end of the rope system penetrates through the fixed pulleys in a winding mode and then is used for loading a test load. The rack is provided with a test position used for placing a to-be-tested machine arm. A to-be-tested vehicle arm is installed on the motor fake part through a bolt. The weight is placed at the tail end of the rope, the function of loading a specified load is achieved, and then the purpose of checking the strength of the arm is achieved. The tilt-rotor aircraft arm rotor six-force-element static test device realizes tilt-rotor aircraft arm rotor six-force-element static test, is convenient and simple to operate, and is flexible and adjustable in loaded load.

The invention provides a concrete normal section reinforcement design method and system, electronic equipment and a storage medium. The method comprises the following steps: establishing a section stress model containing multi-layer reinforcement strain distribution based on plane section assumption; the stress state of the whole process of the section from axle center compression to axle center tension is simulated by setting strain proportion parameters of the strain of the outermost reinforcing steel bar on the tension side and the limit pressure strain of the concrete; aiming at a plurality of set strain state control points, calculating stress of each steel bar layer position, contribution of the stress to axial force and bending moment and contribution of the stress to a concrete compression area; and based on the section static balance condition, the optimal reinforcement area meeting the design load requirement is determined through iterative calculation, and the configuration constraint of multiple layers of steel bars is considered in the iterative calculation. The method overcomes the defects that a traditional method overestimates the effect of the pressed steel bars and ignores the strain difference of multiple layers of steel bars, and the accuracy and safety of reinforcement design of high-performance concrete structures such as nuclear islands are remarkably improved.

The invention provides a device and a method for testing the shearing and compression performance of a helicopter engine damping part. The shearing performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a double-fork (7), an arc-shaped pulling plate (8), a mounting support (10), a dial indicator (11) and a magnetic base (12). The compression performance testing device comprises a base (1), a fixed support (3), a stress application lead screw (4), a tension sensor (5), a dynamometer (6), a mounting support (10), a dial indicator (11), a magnetic base (12), a single lug (13) and a square loading frame (14). Measurement of shear and compression deformation displacement of the engine damping member is realized, shear and compression performance of the engine damping member is verified, and the installed damping member is ensured to effectively prevent transmission of vibration waves and weaken harm of inertial impact to an engine. And the situation that the installation of the damping piece with substandard static performance affects the flight safety is avoided. The test cost is low, the operation is simple, the test efficiency is high, and the deformation displacement of the damping member can be visually reflected.

The invention discloses a method and a system for testing release intention response characteristics in a man-machine handover task of a collaborative robot, and belongs to the technical field of robot performance test and evaluation. Comprising the steps of controlling an end effector of a tested robot to clamp a standard test load and keeping the standard test load at a preset position; external traction force monotonically changing along with time is applied to the load through an external traction device; an original time domain signal of external traction force is collected in real time, and a driving current signal of a tail end joint of the robot is synchronously collected; filtering the collected signals, and calculating intention trigger impulse; based on the time difference of the traction force peak moment, the driving current sudden change moment and the load physical separation moment, the cascade lag time is solved; and based on the intention trigger impulse and the cascade lag time, generating a quantitative index representing the dynamic release performance of the robot. According to the method, the problem that the existing test only pays attention to the static force threshold and ignores the dynamic process characteristics is solved, and objective and quantitative evaluation of the robot release intention response characteristics is realized.

The present application relates to the technical field of fitness equipment, in particular to a fitness action detection guiding robot, which comprises a frame, the frame surrounds a space for performing fitness actions, a horizontal bar is slidably installed on the frame in the vertical direction, a constant resistance unit for increasing static load of the horizontal bar by applying unidirectional rotation resistance is arranged on the bottom of the frame and connected with the horizontal bar, a reset device for pulling down the horizontal bar is arranged in the constant resistance unit, a hovering unit for controlling safe hovering of the horizontal bar is arranged on the frame, and a data processing unit for indirectly detecting force time and force amplitude of weight lifting actions is arranged on the frame. The structure for converting linear motion into rotary motion is arranged on the horizontal bar, the constant resistance unit is arranged on the rotary motion structure, the simulation of core strength training of fitness actions is realized, and the constant resistance unit only applies unidirectional static load to the horizontal bar, thereby avoiding the risk of straining or crushing the user of the horizontal bar.

This invention discloses a method for evaluating the load-bearing state of radial rollers in a tunnel boring machine (TBM) main bearing. Based on the crowning characteristics of the radial rollers in the TBM main bearing, this invention determines the roller crowning clearance, establishes and solves static equilibrium equations, overturning moment equilibrium equations, and radial displacement relationship equations. By summing the radial displacement values, the contact deformation of the rollers in the bearing is obtained. The radial displacement records of the rollers in the bearing are measured under actual radial force and overturning moment conditions. The load-bearing state of the rollers is evaluated by comparing the magnitudes of the roller contact deformation and radial displacement records. This evaluation method can more accurately detect the specific locations of potential risks inside the bearing, providing technical guidance for the monitoring and diagnosis of bearing rollers and ensuring the operation and maintenance of TBM bearings.

The utility model discloses a static crushing device for pile head of bored pile, include: outer sleeve, the tubular setting of circular, and for inserting into the pile head, pressure bar, the vertical insertion of cylindrical in outer sleeve, break the needle, horizontal sliding connection in pressure bar, and along its circumferential direction even distribution, be provided with the sliding hole of break the needle and set up for in outer sleeve, drive mechanism is used for controlling break the needle synchronous horizontal slip. The utility model has the advantages and effects that: through setting the outer sleeve that inserts into the pile head, and setting pressure bar in the outer sleeve, make break the needle of telescopic in pressure bar can penetrate the outer sleeve, and exert pressure to the inside of the pile head, adopt static pressure and realize the crushing of the pile head from inside to outside, the whole process is low in noise, and the degree of pollution is low, and convenient simultaneously fast, effectively improve the construction efficiency.

The invention relates to the technical field of damping of hoisting machinery structures, in particular to a self-adaptive damping system of a tower crane driven by tension of a hoisting steel wire rope, which comprises a swing base mounted on a balance arm, an arc track assembly is arranged on the swing base, and a movable mass block assembly is arranged in the arc track assembly. A tension actuating mechanism is connected between the lifting steel wire rope and the swing base, and a damping mechanism is hinged between the balance arm and the mass block assembly. The posture switching of the swing base is automatically driven by the tension of the lifting steel wire rope, an additional power source is not needed, and the response is quick; the arc track assembly replaces a traditional long simple pendulum with an arc structure, and the problem that the vertical installation space of the tower crane is limited is solved. The mass block assembly has the balance arm counterweight effect and the static balance and dynamic vibration reduction functions, and the structural load and cost are reduced; the damping mechanism efficiently dissipates vibration energy, self-adaptive vibration reduction is cooperatively achieved, and the dangerous bending moment and amplitude of the tower body are effectively reduced.

This invention discloses a method for tooth profile modification and modeling of a logarithmic spiral live gear transmission, belonging to the field of mechanical transmission technology. The method includes: modifying the tooth profile of the moving tooth tip using circular arc curves or higher-order polynomial curves to obtain a modified moving tooth profile; modifying the profiles of the long axis transition section and the short axis transition section of the cam using higher-order polynomial curves to obtain a modified cam theoretical profile; obtaining the modified internal gear profile based on the motion mapping relationship between the modified moving tooth and the cam; establishing a static balance model to analyze the influence of modification parameters on contact force under working conditions; and establishing a three-dimensional model of the logarithmic spiral live gear transmission. This invention can significantly improve meshing accuracy and transmission smoothness, improve tooth profile contact stress distribution, enhance load-bearing capacity and fatigue resistance, and also provide feasible parameter guidance for actual production.

The invention discloses a wind power blade subcomponent structure bending torsion loading failure analysis and optimization method, and belongs to the technical field of wind power blade structure mechanical analysis. The analysis method comprises the following steps: establishing a three-dimensional entity finite element model of a wind power blade sub-component, applying pure shimmy, pure torsion and gradient bending-torsion combined load to carry out nonlinear static analysis, extracting critical failure point data, and comparing and analyzing a rear edge buckling waveform, bonding failure migration and contact behavior change, so as to obtain a critical failure point. According to the method, the internal relation of blade rear edge bonding structure failure, buckling waveform and contact behaviors under the bending-torsion coupling working condition is defined, the migration rule of the rear edge failure position along with the torsion angle and the stress distribution difference between the front edge and the rear edge are defined, and the problem that in the prior art, it is difficult to accurately position the blade vulnerable area under bending-torsion coupling is solved; and a mechanical basis is provided for blade structure optimization. The analysis result obtained through the analysis method can be directly used for guiding the anti-bending coupling design of the blade.

The invention discloses an assembly type pile structure quasi-static test system and device. The assembly type pile structure quasi-static test system comprises a model box arranged on one side of a reaction wall. The pile structure model inserted into the inner side of the model box comprises a model main body, a model seat, a left insertion column and a right insertion column which are of an integrated structure, and the left insertion column and the right insertion column are both inserted into soil on the inner side of the model box; according to the fabricated pile structure quasi-static test system and device, by designing a rotary quick connection structure between the vertical force loading cross beams of the model, the stability of the vertical force loading cross beams above is effectively improved, displacement and falling of the cross beams in the test process are avoided, stable proceeding of the test is guaranteed, and the test efficiency is improved. Meanwhile, the subsequent rapid disassembly and assembly of the vertical force loading cross beam are facilitated, and the test convenience is improved; and an auxiliary limiting structure is designed between the rubber support and the model, so that the stability of the rubber support in a test is ensured, and a reliable basic supporting condition is provided for the test.

This utility model provides a static testing machine for airfoils, belonging to the technical field of static testing equipment. It solves the problem of inconvenient operation of existing static testing equipment. The airfoil static testing machine includes a base, a foundation, mounting components, a display, a suspension mechanism, a steel wire rope, a hand-operated hoist, a pull rope, a force gauge, a support, and a scale. In this utility model, when the pull rope is pulled, it moves the steel wire rope, thereby moving the force gauge and suspension mechanism downwards. During this process, the airfoil is subjected to the traction force of the steel wire rope, causing it to bend. Simultaneously, the force gauge continuously monitors the traction force of the steel wire rope on the suspension mechanism and feeds this force back to the display. When the force applied to the pull rope reaches a predetermined value, the airfoil bends to a certain extent and then stops bending. Thus, the magnitude of the traction force can be changed at any time according to testing needs without changing the load, making operation convenient.

The invention provides a simulation test method and device for static subsidence in marine prefabricated structure soil. The method comprises the steps that a fixed steel plate and a movable steel plate are arranged in a test box body; backfilling a soil layer capable of pre-burying the fixed steel plate and the movable steel plate into the test box body, and then injecting water into the test box body to simulate a seabed environment; the movable steel plate is driven by the lifting mechanism to be gradually separated from the soil layer, so that relative displacement is generated between the movable steel plate and the fixed steel plate, and the working condition of the fixed steel plate in static sinking in the soil layer is simulated; comprehensive pressure data transmitted by a soil layer and a water body and borne by the fixed steel plate are collected in real time through pressure sensing pieces arranged on the fixed steel plate; the device comprises a test box body, a fixed steel plate, a pressure sensor arranged on the fixed steel plate, a lifting mechanism and a movable steel plate which are used as physical carriers for implementing the method, according to the method and the device, the problem of lack of a simulation scheme for the static sinking process of the offshore engineering prefabricated structure in the prior art is solved.

The utility model provides a torque loading device of a torque sensor, and relates to the field of loading calibration. The device mainly comprises a loading part, a bracket and a base. The two loading blocks are distributed on the two sides of the loading rod in a central symmetry mode, a load F is applied to one loading block, and quasi-static force loads F'which are opposite in direction and approximately equal in size can be generated on the other side of the loading rod. The loading head can simulate a working condition that a loading head of a standard loading table applies a load F to an object, and a proper loading head can be selected according to different working conditions of the loading table. The problem that the quasi-static calibration table can only be loaded in a single direction is solved, so that the quasi-static torque is obtained. The method can be applied to scenes requiring torque loading.

The application belongs to the technical field of static test, and relates to a quasi-static test device. The device comprises a support frame, two first hydraulic push rods symmetrically arranged on the support frame, a sliding block, a pressure frame slidably connected to the sliding block, a base fixed to the lower part of the support frame, connecting frames symmetrically arranged and slidably connected to the base, a counterforce frame rotatably connected to the connecting frames, torsional springs fixed between the counterforce frame and the connecting frames, and extrusion frames symmetrically arranged and slidably connected to the base. The positions of the two extrusion frames are adjusted to determine the position of the counterforce frame for supporting the sample, so that the end-fixed sample and the end-hinged sample are simulated. The height of the extrusion frame is changed to adjust the compression degree and the inclination degree of the counterforce frame during force receiving, so that the quasi-static test of the sample under various boundary conditions is realized, and the diversity of test results is improved.

The application provides a beam-column substructure anti-continuous collapse dynamic test device, which comprises a supporting unit, a control unit and a bearing seat, the supporting unit comprises a plurality of supporting assemblies arranged at intervals, the control unit comprises a plurality of control assemblies arranged in one-to-one correspondence with the supporting assemblies, the control assemblies are rotationally connected to the supporting assemblies, and the control assemblies rotate around their own axes; the bearing seat is connected to the control unit; the control assembly has a supporting state of providing a supporting force for the bearing seat and a collapse state of rotating around its own axis to make the bearing seat fall. The beam-column substructure anti-continuous collapse dynamic test device provided by the application aims to solve the problems that the static test in the prior art cannot truly reflect the influence of the dynamic characteristics after the sudden failure of a column on the structural performance, and that the impact test is inconvenient to operate in a laboratory.

The application belongs to the technical field of bridge construction, and is a beam bridge load test method based on time history curve. The method firstly carries out static load test, and then arranges test vehicles at key parts of the test bridge surface by using a step loading mode, and measures deflection points and strain points. Then, the static load test efficiency is calculated through the bridge static load test. According to the step loading mode and the static load test efficiency, a multi-working-condition bridge model is established by using a finite element method to collect time history curves. Finally, dynamic load test is carried out, control sections of each span of the bridge are selected as test sections, and strain fluctuation amplitude, impact coefficient and the like are measured through the dynamic load test. According to the test data, the stress state of the structure under dynamic load is analyzed. The application combines static load test and dynamic load test, can reflect the working performance of the bridge structure under design load, and has high reliability.

This invention discloses a method for on-site monitoring of vertical loads on concrete rectangular cross-section columns, comprising the following steps: selecting a loading test area in the lower part of the column to form a column loading zone; arranging a column confining pressure loading system; placing a leveling rod and orthogonal strain gauges on the loading test area; starting the loading motor to complete the confining pressure loading of the column loading zone; calculating the vertical load of the column based on the three-dimensional static equilibrium condition of the column's small deformation and low confining pressure elastic state, plotting the column's vertical load time-effect characteristic curve, and then combining it with the column's vertical bearing capacity to assess the bearing stability of the reinforced concrete column member during service. This invention can overcome the problems of column bending, tilting, and human error caused by unreasonable vertical load monitoring schemes or monitoring results for reinforced concrete column structures, as well as the problems of technical complexity, high risk, and high monitoring costs. It has the advantages of strong environmental adaptability, rapid and simple testing method, safe operation, and low cost.

A rocket recovery landing leg static test device comprises a rocket body boundary simulation tool, a force loading system tool, a ground simulation device, a test bed, a data acquisition system and a hydraulic system, the ground simulation device is arranged in the test bed, the force loading system tool is arranged on the ground simulation device and connected with the test bed, and the data acquisition system is connected with the hydraulic system. The rocket body boundary simulation tool is arranged on the test bed, a normal-temperature strain gauge is pasted on the rocket body boundary simulation tool as a test piece, the data acquisition system is connected with the normal-temperature strain gauge, the hydraulic system is connected with the data acquisition system, and the data acquisition system acquires and monitors pressure and strain data. The basic stress condition of the rocket recovery device during landing in various terrains can be simulated, and the bearing capacity of the recovery device and the strain distribution condition of each part under the load effect can be obtained.

The invention discloses a drilling and penetrating integrated machine tool based on spiral drilling, and relates to the technical field of geotechnical engineering in-situ testing, the drilling and penetrating integrated machine tool comprises a spiral drilling rod, a pressure transmitting and torsion isolating assembly and a static sounding assembly; the lower end of the auger stem is connected with a screwed joint at the upper end of the pressure-transmitting torsion-isolating assembly through a male screwed joint; the lower end of the pressure transmission and torsion isolation assembly is precisely matched with an internal thread at the upper end of the static sounding assembly through an external thread joint; a sealing ring groove is formed in the joint face of the pressure transmission and torsion isolation assembly and the static sounding assembly, a fluororubber O-shaped ring is arranged in the sealing ring groove, and dynamic sealing in the high-pressure environment is achieved. Torque interference is isolated and stable data transmission is ensured through the pressure transmitting and torque isolating assembly, and high-precision formation parameter measurement is achieved through the static sounding assembly. The technical effects that the working efficiency is improved, the data continuity is good, equipment configuration is simplified, stratum disturbance is relieved, and the conical tip performance is improved can be achieved.

This invention discloses a prefabricated adjustable static testing device, relating to the technical field of static testing devices for building engineering. It includes an adjustment mechanism on which a load sensor and a hydraulic jack are sequentially mounted. One end of the load sensor is fixedly connected to the adjustment mechanism, and the other end is fixedly connected to the hydraulic jack. The adjustment mechanism drives the load sensor and hydraulic jack to adjust in three directions: length, width, and height. Limiting mechanisms are provided around the hydraulic jack and are fixedly connected to the adjustment mechanism. This invention enables adjustment of the load sensor and hydraulic jack in three directions (length, width, and height) without requiring separation of the load sensor and hydraulic jack, simplifying operation, reducing workload, and improving the efficiency of static testing. The limiting mechanisms increase the rigidity and overall stability of the testing device, improving the accuracy of static testing.

The invention discloses an inclination angle type static leveling instrument with Abbe error correction, which comprises a shell, a rotating shaft is rotatably arranged in the shell, a connecting rod is fixed on the rotating shaft, a floating ball is fixed at the front end of the connecting rod, an inclinometer is mounted on the connecting rod, and the inclinometer is used for obtaining a pitch angle alpha and a roll angle beta of the connecting rod. The measured height delta H of the dip angle type static leveling instrument with abbe error correction is calculated by a formula (1). Compared with the prior art, the liquid level change drives the floating ball to cause the dip angle change of the connecting rod, the angle encoder collects the rotation angle p, meanwhile, the inclinometer collects the pitch angle alpha and the roll angle beta of the connecting rod, and then the abbe error is corrected according to a preset algorithm to calculate the absolute height variation. Through the structural design, the pose requirement of the level gauge is reduced, so that the level gauge can adapt to more complex measurement scenes. And secondly, relative height variation measurement is converted into absolute height variation measurement, so that the data reliability is improved.

The present application belongs to the technical field of structure vibration isolation and reduction, and particularly relates to a vertical quasi-zero stiffness limiting vibration isolation device with adjustable load. The device comprises a bearing plate, an upper limiting plate, a lower limiting plate, a positive stiffness mechanism, a negative stiffness mechanism, a connecting rod and an adjusting support part. The positive stiffness mechanism is arranged between the bearing plate and the upper limiting plate, and the negative stiffness mechanism and the adjusting support part are arranged between the upper limiting plate and the lower limiting plate. The adjusting support part comprises four supporting cylinders and eight round-hole sliders. The connecting rod connects the positive stiffness mechanism and the negative stiffness mechanism, and a central connecting block is arranged on the connecting rod. One end of the negative stiffness mechanism is connected with the central connecting block, and the other end is connected with a round-hole slider. By adjusting the pre-compression coefficient of the inclined elastic element of the negative stiffness mechanism, the stroke of the round-hole slider and the position of the central connecting block on the connecting rod, the quasi-zero stiffness characteristic is maintained at the initial static force balance position, and the nonlinear vibration isolation effect of high static stiffness and low dynamic stiffness is realized.