13 results about "Displacement based" patented technology

This invention provides a method and apparatus for evaluating the service status of tunnel lining based on deformation response. After the tunnel is put into operation, without calculating the increment or total amount of surrounding rock pressure or load after operation, it is possible to determine the lining crack width and safety factor, and evaluate or analyze the secondary lining service status and its variation law at any service time of the tunnel. The method includes: Step 1, determining the displacement increment u2 of the tunnel from the time of commissioning or acceptance to a certain tunnel maintenance time t under the service status; Step 2, establishing a load structure model of the tunnel; Step 3, applying displacement directly to the load structure model based on the displacement increment u2, fixing constraints on all element nodes, and calculating the internal forces of the structure; Step 4, obtaining the safety factor and crack width of the element based on the internal forces of the element; Step 5, evaluating the service status of the tunnel at the tunnel maintenance time t based on the safety factor and crack width.

This invention discloses a deformation analysis method for multi-bolt structural connections based on displacement field equivalence and machine learning, relating to the field of advanced aircraft connection technology, and aimed at solving the technical problems of high computational load and low efficiency in existing technologies. The method includes: establishing a refined model of a single bolt connection process; analyzing the deformation of the connected components during the connection process based on the refined model; obtaining the equivalent load based on the deformation displacement field; constructing a multi-bolt connection deformation analysis model and creating connection elements within the analysis model; simulating the overall component by inputting the equivalent load to obtain a sample dataset; training a machine learning model using the sample dataset and learning the mapping relationship between load boundary conditions and deformation response from the simulation samples; and predicting the deformation of the multi-bolt structural connection based on the trained machine learning model.

This invention belongs to the field of tunnel surrounding rock stability analysis, specifically disclosing a method for predicting tunnel surrounding rock displacement time series curves based on dynamic Bayesian networks. The method includes: S1. Discretizing influencing factors and surrounding rock displacement to establish a sample library; S2. Improving the construction method of the interpretive structure model to establish an interpretive structure model; S3. Constructing a static Bayesian network model for predicting tunnel surrounding rock displacement based on the interpretive structure model; S4. Improving the structure construction method and parameter learning method of the dynamic Bayesian network model; S5. Constructing a dynamic Bayesian network model inference method to establish a dynamic Bayesian network model; S6. Predicting the tunnel surrounding rock displacement time series curve. This invention optimizes the construction methods of the interpretive structure model, static Bayesian network model, and dynamic Bayesian network model, enabling the determination of the dynamic development of surrounding rock displacement before tunnel construction. This has significant guiding value for tunnel site selection, advanced support, construction method selection, and engineering defect diagnosis.

This invention discloses a method for seismic-resistant hybrid reinforcement and dynamic control of steel-concrete composite members, relating to the field of civil engineering technology. The method includes configuring an internal steel section, an external high-strength steel bar, and an external fiber-reinforced composite bar to form a hybrid reinforcement system; determining the initial stiffness and mass distribution of the member; calculating the fundamental period of the structure; establishing a dynamic weight relationship between the contribution of each reinforcement component to resisting forces and the inter-story displacement based on the hybrid reinforcement system; obtaining the characteristic period of seismic motion at the target site; determining the dynamic matching characteristics in conjunction with the fundamental period of the structure; and evaluating the required damping level of the member using the dynamic weight relationship; setting adjustable energy dissipation elements in key areas of the member according to the required damping level to form a damping control scheme corresponding to the dynamic matching characteristics; and, based on the damping control scheme, deploying a main energy dissipation zone using low-yield-point steel and an auxiliary energy dissipation zone using shape memory alloy materials in the nodal region and mid-span region, respectively.

The invention relates to the field of testing of rock and soil mechanics and granular material mechanics, and provides a method and a system for obtaining structure anisotropy parameters of a discrete material, and the method comprises the following steps: S1, establishing a micro-form constitutive model for describing the particle motion state of the discrete material; s2, obtaining a frequency dispersion relation between spin longitudinal waves and spin transverse waves; s3, establishing a relation model between the cut-off frequency and the anisotropic parameters of the discrete material structure; and S4, performing inversion to obtain the structure anisotropy parameters of the discrete material. According to the method, the characteristics that the spin wave cut-off frequency is non-zero and can be stably measured are fully utilized, the defect that a traditional wave velocity inversion method based on displacement waves is greatly influenced by the frequency dispersion effect and test conditions is effectively overcome, and the method has the advantages of being clear in theoretical basis, high in measurement stability, high in inversion precision, high in application and popularization performance and the like; the method can be widely applied to structural diagnosis of granular materials, design optimization of engineering materials and anisotropic recognition research of complex geological media.

The invention discloses a regulation and control system and method based on an electromagnetic adjustable and controllable friction pendulum composite seismic isolation support, and relates to the technical field of seismic isolation devices in building seismic engineering. According to the system, a horizontal displacement signal of a support is collected in real time through a displacement sensing layer and is transmitted to a microcontroller of an intelligent decision-making layer through a signal processing layer; the microcontroller outputs a corresponding current control signal according to the electromagnetic force regulation and control coefficient based on the relation between the displacement error and the change rate of the displacement error; a programmable current source of the execution regulation and control layer converts a control signal into an accurate current to drive an electromagnet to generate a dynamic electromagnetic force. The electromagnetic force forms adjustable normal pressure through magnetic circuit coupling, and real-time regulation and control of the equivalent stiffness and the damping characteristic of the support are achieved. A closed-loop intelligent control framework with displacement sensing, algorithm decision making, electromagnetic regulation and control and dynamic response is adopted, and the self-adaptive regulation and control capacity of a seismic isolation system on complex seismic excitation is remarkably improved.

The application discloses a kind of digital construction control methods of high-rise building steel skeleton inclined column, to solve the precision control problem caused by structural dynamic deformation and error accumulation in construction process.The method uses extended Kalman filter to estimate the real-time global deviation state of structure online, and combines recursive least squares method to identify and adaptively update the structure state space model online;Further, the theoretical design pose, the environment-induced displacement based on environment data prediction, and the active compensation displacement for active suppression of deviation are synthesized to determine the optimal installation pose of the inclined column to be installed;Finally, digital instructions are generated to guide construction, and the actual installation pose is measured to form a closed-loop feedback for correcting the state estimation of the next cycle.The application can actively suppress error accumulation through closed-loop control combining model adaptation and predictive compensation, improving the construction accuracy and robustness of high-rise building.

The application provides a marine structure anti-collision performance multi-working condition iterative optimization method and device, including: establishing a finite element analysis model containing soil layer information; applying an operating period dead load to the finite element analysis model and performing static force solving to obtain an initial working condition of a ship collision load; obtaining a plurality of impact working conditions, calculating total ship collision energy and deformation control displacement; performing trial calculation on components of the finite element analysis model and setting the components as fiber beam units; calculating structure energy absorption of the plurality of impact working conditions; calculating energy ratios of the plurality of impact working conditions based on the structure energy absorption and the total ship collision energy, adjusting impact coefficients based on the energy ratios; calculating maximum displacements of the plurality of impact working conditions, calculating displacement ratios of the plurality of impact working conditions based on the maximum displacements and the deformation control displacement, adjusting diameters of rod members and wall thicknesses of the rod members based on the displacement ratios; and outputting final diameters of the rod members and wall thicknesses of the rod members. In the method, marine structure sizes can be automatically iteratively optimized, and the working efficiency of designers is improved.

The invention discloses a steel box girder pushing intelligent control method and system for bridge construction. The method comprises the following steps: collecting multi-source heterogeneous data such as jack oil pressure, steel box girder displacement and environment illumination temperature field on a construction site; constructing a digital twinborn scene comprising a physical entity and an environmental thermodynamic model at a control terminal; performing thermal-mechanical coupling simulation based on the real-time illumination temperature field, and calculating a theoretical thermally induced deformation value of the steel box girder; subtracting the theoretical thermally induced deformation value from the actually measured displacement to obtain a real mechanical deviation, and generating a basic pushing speed instruction according to the real mechanical deviation; analyzing a hysteresis response relationship between oil pressure and displacement based on a digital twinning scene, identifying a static friction state, and generating a micro-motion vibration suppression pulse instruction; and superposing the micro-motion vibration suppression pulse instruction to a basic pushing speed instruction, and driving a hydraulic pump station to execute pushing operation with micro-amplitude high-frequency disturbance. According to the method, thermal deformation misjudgment can be effectively eliminated, stick-slip tremor is inhibited, and the construction precision and safety are improved.

The application provides a bedding slope quantitative discrimination and stability calculation method in the field of geological disaster prevention. The method comprises the following steps: determining a quantitative relationship function among an excavation slope surface and a rock stratum strike angle, a rock stratum dip angle and a slope creep displacement based on the number of free surfaces of the slope; determining a critical strike angle of the slope based on the curvature radius of the quantitative relationship function, and determining whether the slope is a bedding slope based on the critical strike angle; in the case that the slope is a bedding slope, calculating a stability coefficient of the bedding slope; and the value of the stability coefficient represents whether the bedding slope is in a stable state. The method can convert the qualitative discrimination of the slope into quantitative calculation, enhances the accuracy and practicability of the slope stability analysis, can provide a reliable basis for the slope engineering design, construction and monitoring, effectively reduces the slope instability risk, and guarantees the engineering safety.

The invention provides an intelligent member explosion damage intelligent evaluation method and system based on an intelligent agent, and is applied to the technical field of explosion damage evaluation, and the method comprises the steps: obtaining member information and explosion load information of a reinforced concrete member inputted by a user; the component information and the explosion load information are input into an intelligent body based on a large language model, the damage result, output by the intelligent body, of the reinforced concrete component is obtained, and equivalent single-degree-of-freedom conversion is carried out based on the component information and the explosion load information, and equivalent single-degree-of-freedom parameters of the reinforced concrete component are obtained; determining a displacement time travel curve of the reinforced concrete member based on the equivalent single-degree-of-freedom parameter and a preset time step; and based on the maximum displacement in the displacement time history curve, performing damage evaluation on the reinforced concrete member to obtain a damage result of the reinforced concrete member. According to the invention, automatic, intelligent, professional and question-and-answer component explosion damage assessment can be realized.

The invention relates to the technical field of jacking construction, and provides a structure overall stability control lifting method based on displacement cooperative control. The structural overall stability control improvement method based on displacement cooperative control comprises the following steps: S1, early-stage preparation; s2, a multi-point mixed supporting system is built; s3, carrying out structure collaborative cutting; s4, intelligent synchronous jacking is carried out; s5, dynamic monitoring and risk control; s6, connecting column fixing; and S7, dismantling. The overall structure stability control lifting method based on displacement cooperative control has the advantages of being stable in supporting, accurate in synchronization, controllable in risk and efficient in construction, through multi-point-position mixed supporting, intelligent synchronous jacking and dynamic monitoring linkage, the structure can be stably lifted to the target height, the deformation and instability risks are effectively avoided, and the stability of the structure is improved. And construction safety and structural stability are guaranteed.