22 results about "Load displacement" patented technology

The invention discloses a self-piercing riveting simulation prediction and parameter optimization method and related equipment, and relates to the technical field of mechanical connection numerical simulation, and the method comprises the steps: building a material failure model according to material failure information; setting boundary conditions of the self-piercing riveting joint forming simulation model according to test working conditions to obtain section data and a joint model of the self-piercing riveting joint; establishing a mechanical property simulation model of self-piercing riveting according to the mechanical property sample based on the joint model, and setting boundary conditions of the mechanical property simulation model; calculating according to the mechanical property simulation model to obtain a load displacement curve; optimizing parameters of the material failure model by taking the undercut amount and the bottom thickness size error of the cross section and the root mean square error of the load displacement curve as optimization targets; the optimized parameters are substituted into the self-piercing riveting joint forming simulation model and the mechanical property simulation model, corresponding boundary conditions are set for simulation, and a simulation result is obtained. According to the method, the simulation precision and the process optimization efficiency are improved.

The invention discloses a fixed wing type cross-domain aircraft capable of realizing self-adaptive load replacement, belongs to the technical field of cross-domain aircrafts, and is used for a water-air double-domain operation cross-domain aircraft. Comprising an aircraft body, a main wing, an aileron, a tail assembly, a vertical take-off and landing support, a vertical take-off and landing rotor wing, a fixed wing propeller, an underwater propeller, a load replacement device and a control module. The control module comprises a decision making system, a telemetering communication system, a state sensing system, an underwater water surface load replacement system, a water surface four-rotor vertical take-off and landing control system, an air fixed-wing cruise control system and an underwater vehicle control system. According to the fixed wing type cross-domain aircraft, through collaborative innovation of a multi-mode power system and self-adaptive buoyancy control, the dynamic characteristic adaptation problem in cross-domain navigation is solved, and the fixed wing type cross-domain aircraft has the vertical take-off and landing capacity, the air cruising capacity and the underwater maneuvering capacity.

The invention discloses an on-load displacement counterweight system and a crane. The on-load displacement counterweight system comprises a rotary table, a displacement mechanism and a counterweight, the displacement mechanism comprises a counterweight lifting device, a first end of which is rotatably connected with the rotary table, and a second end of which is rotatably connected with the rotary table. The sliding connection structure is in sliding connection with the counterweight lifting device and is provided with a connection part connected with the counterweight; and the driving device is used for driving the counterweight lifting device to rotate relative to the turntable so as to drive the counterweight to move back and forth relative to the turntable, so that the gravity center position and the turning radius of the counterweight are changed. After the counterweight and the counterweight lifting device are hung through the sliding connection structure, the counterweight lifting device can be driven by the driving device to achieve on-load displacement of the counterweight, and the counterweight does not need to be disassembled in the displacement process.

The invention provides a method for determining cohesion model parameters. The method comprises the steps of obtaining a to-be-analyzed structure; performing a thrust shear test on the to-be-analyzed structure to obtain a load displacement test curve of the to-be-analyzed structure; inputting the load displacement test curve into a pre-trained cohesion model parameter prediction model to obtain cohesion model parameters of the to-be-analyzed structure; wherein the structure to be analyzed is a structure comprising a bonding interconnection layer. According to the method, the thrust shear test is performed on the to-be-analyzed structure to obtain the load displacement test curve of the to-be-analyzed structure, and the cohesion model parameters of the to-be-analyzed structure can be obtained by inputting the load displacement curve into the pre-trained cohesion model parameter prediction model, so that rapid determination of the cohesion model parameters is realized; the determination difficulty of cohesion model parameters is reduced, and the determination efficiency is improved.

This invention discloses a method for determining the loosening load of the bearing arch in mega-span tunnels based on plastic zone parameters, relating to the field of geotechnical engineering and underground engineering support design technology. The method includes the following steps: inputting tunnel and support parameters; obtaining the height of the plastic zone at the arch crown through numerical simulation; calculating the equivalent thickness of the bearing arch formed by the system anchors; determining the equivalent loosening load height; calculating the vertical loosening pressure; determining the lateral pressure coefficient based on the surrounding rock strength index; calculating the non-uniformly distributed horizontal loosening pressure; and cyclically outputting the verified load through load displacement verification. This invention directly incorporates the plastic zone development state into the load calculation and establishes a self-correction mechanism, achieving refined and dynamic determination of the loosening load, thus improving the safety and economy of mega-span tunnel support design.

The utility model relates to the technical field of intelligent logistics, particularly discloses a load displacement detection device applied to the root of a fork arm of a forklift AGV (Automatic Guided Vehicle), and aims to improve the reliability and the accuracy of cargo in-place detection. The device comprises a first displacement detection mechanism and a second displacement detection mechanism which have the same structure and are respectively arranged at the root part of a first fork arm and the root part of a second fork arm of the forklift AGV. By detecting the displacement and / or speed from the target load to the two displacement detection mechanisms at the same time, dual monitoring of the in-place condition of the goods is achieved. According to the design, redundancy guarantee can be provided when the single-point type detection mechanism fails, the problems of dislocation, collision and the like in the carrying process are avoided, and the adaptability and the stability of the detection device are remarkably improved. The load displacement detection device is simple in structure and easy to implement, can be widely applied to multiple fields of factory workshops, warehouse management and the like, and effectively improves the performance and safety of the forklift AGV in an intelligent logistics handling system.

This invention relates to a method for determining the load-bearing capacity of anchor bolts considering cementation damage behavior, belonging to the field of roadway surrounding rock control. The method includes calculating and determining the normal compressive stress at the anchorage interface between the anchor bolt and the anchoring agent; calculating the anchor bolt load-bearing capacity envelope, which is composed of the load-bearing capacity generated by the shear dilatation of the ribbed section of the anchor bolt and the load-bearing capacity generated by the cohesive force of the anchoring agent; dividing the anchor bolt loading process into two stages, including a pre-peak stage and a post-peak stage, defining the dynamic shear dilatation angle of the anchorage interface and the method for determining the cohesive force of the anchoring agent for the pre-peak and post-peak stages respectively; calculating the anchor bolt load-bearing capacity; and summarizing the calculated anchor bolt load-bearing capacity and the anchor bolt loading displacement results to plot the relationship curve between the anchor bolt load-bearing capacity and the anchor bolt loading displacement. Based on this invention, the load-bearing capacity of anchor bolts can be accurately calculated and the influence of cementation damage behavior on the load-bearing capacity of anchor bolts can be clarified, which is of great significance for revealing the anchoring mechanism of anchor bolt support.

This application provides a bridge health early warning method and system based on computer vision. It can acquire state monitoring images of a target bridge to determine the actual displacement of each frame; construct a bridge model to determine the static deflection of the bridge model under preset load conditions; determine abnormal static impacts of the target bridge under preset loads by analyzing all actual displacements and the static deflection; extract vehicle motion information to construct the bridge displacement trajectories when different vehicles pass over the bridge; perform load analysis on various displacement trajectories using the static deflection to obtain the motion impact response of the load under various displacement trajectories; determine the state of load displacement under different load conditions based on abnormal static impacts and all motion impact responses; and output health early warning signals corresponding to different load displacement states. Using the scheme of this application, continuous monitoring of bridges can be achieved, reducing the simulation difficulty of finite element analysis.

The present application belongs to the technical field of chassis knuckle steering rod arm bearing capacity simulation, and particularly relates to a method for improving the simulation precision of knuckle arm bearing capacity; firstly, the material nonlinearity of the knuckle, ball head and inner sleeve is considered, the interference contact between the inner sleeve and the knuckle is considered, the contact between the ball head pin and the inner sleeve is considered, the initial pre-tightening force of the ball head pin is considered, the load is applied along the direction of the pull rod at the outer ball head of the steering pull rod, the load displacement curve of the loading point is calculated, with the increase of the load, the structure gradually yields, the slope of the bearing capacity curve gradually becomes smaller, when the slope reaches a certain value, it is determined that the entire structure yields, i.e. loses the bearing capacity, the present application is based on the finite element model of the knuckle and ball head assembly, and the load displacement curve method is used to calculate and evaluate the bearing capacity of the structure, this method is not the local behavior of the structure, but the overall behavior of the structure, thereby improving the simulation precision of the knuckle steering pull rod arm bearing capacity.

The invention relates to a method for determining the bearing performance of an anchor rod by considering a cementing damage behavior, which belongs to the field of roadway surrounding rock control and comprises the following steps: calculating and determining the normal pressure stress of an anchoring interface between the anchor rod and an anchoring agent; calculating the bearing capacity envelope line of the anchor rod, wherein the bearing capacity envelope line of the anchor rod is composed of the bearing capacity generated by the rib section of the anchor rod due to the shear expansion effect and the bearing capacity generated by the cohesion of the anchoring agent; the loading process of the anchor rod is divided into two stages including a pre-peak stage and a post-peak stage, and an anchoring interface dynamic dilatancy angle and an anchoring agent cohesion determination method are defined for the pre-peak stage and the post-peak stage respectively; calculating the bearing capacity of the anchor rod; and summarizing the calculated bearing capacity of the anchor rod and the loading displacement result of the anchor rod, and drawing a relation curve of the bearing capacity of the anchor rod and the loading displacement of the anchor rod. Based on the method, the bearing performance of the anchor rod can be accurately calculated, the influence of the cementing damage behavior on the bearing performance of the anchor rod can be clarified, and the method has important significance on revealing an anchor rod supporting anchoring mechanism.

The application provides a heave compensation system, method, device and equipment for a ship crane. The heave compensation method comprises the following steps: obtaining a ship body heave signal measured by a heave measuring unit, and obtaining a prediction signal of ship body motion according to the ship body heave signal; performing displacement conversion on the prediction signal of the ship body motion to obtain a vertical integrated heave displacement of a cable extension point; generating a feedforward compensation amount according to the vertical integrated heave displacement; obtaining a tracking error by subtracting a load displacement fed back by a feedback control chain from an instruction displacement; obtaining a basic control amount according to the tracking error; performing superposition operation on the feedforward compensation amount and the basic control amount to obtain a total control amount, and outputting the total control amount to a winch to drive the winch to wind or unwind the cable. The heave compensation method has strong anti-disturbance ability, high control precision and fast dynamic response speed.

This product is a gap filler member for anchors used in displacement-suppressing anchors that suppress displacement caused by loads on driven anchors. When load displacement occurs in the main anchor 1 of a driven anchor, which is mainly used on slopes, as shown in the first reference figure (before displacement) and the second reference figure (after displacement), the auxiliary anchor 2 contacts the main anchor 1 and resists the displacement, receiving the external force acting on the main anchor 1, and moves in a direction having a directional component substantially perpendicular to the displacement direction (arrow) of the main anchor 1 so that the two cylindrical parts 2a and 2b move away from each other, thereby distributing the external force acting on the main anchor 1 to the surrounding ground and suppressing the amount of displacement of the main anchor 1. As shown in the first reference diagram (before displacement) and the third reference diagram (both showing the state of use), this item is placed in the gap created during anchor installation between the two cylindrical parts 2a and 2b of the auxiliary anchor and the main anchor 1. It fills this gap, so that when the main anchor 1 is displaced by an external force acting on the main anchor 1, a load is applied to the auxiliary anchor 2 without any time lag from the very beginning.

This product is an auxiliary anchor that suppresses the displacement of driven anchors due to load. This product is mainly used on slopes, and as shown in the first and second reference diagrams showing the state of use, the two cylindrical parts of the auxiliary anchor are positioned on either side of the direction (arrow) in which the central anchor is displaced when in use. When load displacement occurs in the anchor, as shown in the third and fourth reference diagrams showing the state of use, the auxiliary anchor contacts the anchor to resist its displacement and absorbs the external force acting on the anchor, while moving in a direction that has a component approximately perpendicular to the direction of the anchor's displacement, so that the two cylindrical parts move away from each other, thereby distributing the external force acting on the anchor to the surrounding ground. At this time, the range of movement of the cylindrical parts is restricted by a stopper. With this product, anchors used for holding fences, etc., can be installed even in soft ground (e.g., N-value of 4 or less) with boulders or bedrock present.

The invention discloses a micro-pile probe and an in-situ bearing capacity testing method thereof.The micro-pile probe comprises a bearing plate used for bearing external acting force and pressed into a soil layer, an upper loading chamber fixedly installed at the bottom of the bearing plate, and a side resistance assembly movably installed on the upper loading chamber and sliding along the axis of the upper loading chamber to measure pile side resistance; the lower loading chamber is fixedly installed at the bottom of the upper loading chamber, and the end resistance assembly is installed in the lower loading chamber and below the shaft and used for measuring pile end resistance. The pile foundation bearing capacity in-situ testing device can carry out pile foundation bearing capacity in-situ testing, can directly measure the side resistance and the end resistance of each section of the pile foundation, can measure the displacement corresponding to the side resistance and the end resistance at the same time, and can obtain a load displacement curve of each section of the pile foundation based on the side resistance, the end resistance and the corresponding displacement. The pile foundation bearing capacity can be obtained through a load transmission method, the measurement precision is high, and the measurement result is reliable.

The present application belongs to the technical field of rock mass engineering support, and proposes a calculation method of full-length anchoring anchor rod pulling load considering multiple anchoring defects. The specific steps are: obtaining anchoring interface bonding strength parameters, anchor rod mechanical parameters, anchoring defect parameters and anchoring anchor rod length and diameter; establishing a full-length anchoring anchor rod load transmission mechanical model considering multiple anchoring defects, anchoring interface nonlinear slip and anchor rod plastic hardening, solving the axial stress, shear stress and displacement of each node of the anchor rod anchoring section and the defect section based on the model; obtaining the load-displacement curve of the full-length anchoring anchor rod containing multiple defects, the ultimate pulling load and the peak displacement, which are directly used for support design optimization. The present application considers the nonlinear shear slip behavior of the anchoring interface, the plastic hardening of the anchor rod and the multiple anchoring defects, can more accurately predict the load displacement curve, the ultimate pulling load and the peak displacement of the anchor rod, and has important significance for the design of anchor rods and the evaluation of anchoring quality in rock mass support construction.

The present application belongs to the technical field of vehicle simulation and relates to a positive design method for preventing the disengagement of a shock absorber sleeve; under the condition of defining the design target of the sleeve pull-out force, based on the test data of the sleeve pull-out force bench, in combination with the finite element model of the shock absorber fork, sleeve and bolt assembly, the real friction coefficient between the shock absorber fork and the sleeve is calibrated, the finite element model is corrected, the pull-out force of the sleeve is calculated based on the corrected finite element model by using the load displacement curve method, the bolt pre-tightening force is back calculated, the appropriate standard bolt is matched, the positive design is realized, the problem that the simulation result of the sleeve pull-out force is small and leads to design redundancy is solved, the problem that the simulation result of the sleeve pull-out force is large in simulation and leads to the disengagement of the sleeve in the vehicle test is solved, and the simulation result of the sleeve pull-out force is more accurate.

The application discloses a kind of micro pile probe and its in-situ bearing capacity test method, wherein micro pile probe, including the pressure plate for bearing external force and being pressed into soil layer, the upper loading chamber of fixed installation in the bottom of pressure plate, the side resistance component of active installation on the upper loading chamber and along its axis sliding to measure pile side resistance, the lower loading chamber of fixed installation in the bottom of upper loading chamber, and the end resistance component of installation in the inside of lower loading chamber and below axis and for measuring pile end resistance.The application can carry out pile foundation bearing capacity in-situ test, can directly measure the side resistance and end resistance of each section of pile foundation, and simultaneously measure the displacement corresponding to side resistance and end resistance, based on side resistance and end resistance and corresponding displacement, the load displacement curve of each section of pile foundation can be obtained, and the bearing capacity of pile foundation can be obtained by load transfer method, with high measurement accuracy and reliable measurement result.

The invention provides a heave compensation system, a heave compensation method, a heave compensation device and heave compensation equipment for a ship crane, and the heave compensation method comprises the following steps: obtaining a ship body heave signal measured by a heave measurement unit, and obtaining a forecast signal of ship body movement according to the ship body heave signal; carrying out displacement conversion on the forecast signal of the ship motion to obtain vertical comprehensive heaving displacement of the extension point of the mooring rope; generating a feed-forward compensation amount according to the vertical comprehensive heave displacement; subtracting the instruction displacement from the load displacement fed back by the feedback control chain to obtain a tracking error; obtaining a basic control quantity according to the tracking error; and performing superposition operation on the feed-forward compensation quantity and a basic control quantity to obtain a total control quantity, outputting the total control quantity to a winch, and driving the winch to take up and pay off a cable. The heave compensation method is high in disturbance rejection capability, high in control precision and high in dynamic response speed.

This product is a displacement-suppressing anchor that suppresses displacement caused by the load of a driven anchor. This product is mainly used on slopes, and when in use, as shown in the first reference diagram (before displacement) showing the state of use, the two cylindrical parts 2a and 2b that form the auxiliary anchor 2 are positioned on both sides of the direction (arrow) in which the central anchor 1 is displaced. When load displacement occurs in anchor 1, as shown in the second reference diagram (after displacement) showing the state of use, the two cylindrical parts 2a and 2b of the auxiliary anchor 2 come into contact with anchor 1 via the filler material 3, resisting the displacement of anchor 1 and moving away from each other while receiving the external force acting on anchor 1. That is, they move in a direction having a directional component approximately perpendicular to the direction of displacement of anchor 1, distributing the external force acting on anchor 1 to the surrounding ground and suppressing the amount of displacement of anchor 1. With this product, anchors used for holding fences, etc., can be installed even in soft ground (e.g., N-value of 4 or less) with boulders or bedrock.

The invention discloses a ship lock overall stability observation method and system based on continuous staggered joint observation, and the method comprises the steps: extracting and processing the historical record of a ship lock, and constructing a historical data set; combining a temperature change formula, a load displacement formula and the aging model to construct a ship lock horizontal direction displacement prediction multivariate equation for predicting the future displacement of the ship lock in the horizontal direction; meanwhile, the foundation settlement amount is corrected to predict the future displacement of the ship lock in the vertical direction, and the future displacement of the ship lock is comprehensively obtained; setting a ship lock displacement threshold value for ship lock stability judgment, and performing reinforcement measures according to the ship lock stability. The system comprises a control module, a data acquisition module, a downloading module, a processing module and an analysis module. Through real-time monitoring and multi-factor coupling prediction, the problem that the stability cannot be dynamically evaluated by a traditional method is solved, traditional passive maintenance is converted into active preventive maintenance, the operation safety and economy of the ship lock are greatly improved, and the method is particularly suitable for long-term health management of a high-load navigation hub.

The application discloses a design method of flexible energy-absorbing composite fender for hovercraft, which comprises the following steps: selecting the material of an outer cover layer and an inner energy-absorbing carrier to form a constraint structure; modeling the outer cover layer and the inner energy-absorbing carrier based on the differences between the physical properties and the mechanical properties of the outer cover layer and the inner energy-absorbing carrier and the complex coupling performance, and forming a constitutive model of the composite fender material; establishing a local rigid ship body model, coupling the composite fender material model with the ship body structure model, and forming an integrated fender material-rigid ship body simulation model; and forming a multi-specification outer cover layer and a multi-combination fender material design scheme of different material energy-absorbing foams. The application can provide a more accurate and effective fender material design method for hovercrafts with different full load displacements than the method based on experience. The application fully considers the adaptability between the main performance indexes of the fender material, such as energy-absorbing and deformation ratio, and the aluminum alloy ship body stiffness, and improves the anti-collision capability of the hovercraft during amphibious landing.

This product is a displacement-suppressing anchor that suppresses displacement caused by the load of a driven anchor. This product is mainly used on slopes, and when in use, as shown in the first reference diagram (before displacement) showing the state of use, the two cylindrical parts 2a and 2b that form the auxiliary anchor 2 are positioned on both sides of the direction (arrow) in which the central anchor 1 is displaced. When load displacement occurs in anchor 1, as shown in the second reference diagram (after displacement) showing the state of use, the two cylindrical parts 2a and 2b of the auxiliary anchor 2 come into contact with anchor 1 via the filler material 3, resisting the displacement of anchor 1 and moving away from each other while receiving the external force acting on anchor 1. That is, they move in a direction having a component in a direction substantially perpendicular to the direction of displacement of anchor 1, distributing the external force acting on anchor 1 to the surrounding ground and suppressing the amount of displacement of anchor 1. At this time, the range of movement of the cylindrical parts 2a and 2b is restricted by the stopper bolts that connect them. With this product, anchors used for holding fences, etc., can be installed even in soft ground (e.g., N-value of 4 or less) with boulders or bedrock.