176 results about "Stress control" patented technology

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 an oxide thin film post-processing method based on multi-stage cooling annealing, and aims to actively regulate and control thin film stress while repairing oxygen vacancies through a precisely designed heat treatment process. According to the method, the problem that stress control and defect repair are difficult to consider in the annealing process is solved, and a solid theoretical basis and scientific basis are laid for preparing low-absorption and high-stability oxide intense laser thin film devices.

The invention belongs to the technical field of ultra-precision machining, and discloses a micro-fluidic chip based on the electroosmosis effect and a stress regulation and control method thereof.The micro-fluidic chip is internally provided with a plurality of solution channels, each solution channel is of a snakelike reciprocating structure, one end of each solution channel is provided with a channel inlet, and the other end of each solution channel is provided with a channel outlet; a plurality of inflection points arranged at intervals are arranged on one side, facing the bottom of the micro-fluidic chip, of the solution channel, the inflection points are close to the bottom of the micro-fluidic chip and are distributed on the micro-fluidic chip in the horizontal direction, and an electrode is further arranged on the solution channel. The electroosmosis effect and the microfluidic technology are combined, high-precision dynamic stress regulation and control are achieved through gradient flow channel design, a composite driving liquid formula and a hysteresis compensation algorithm, and the problems that pressure control response is delayed and precision is insufficient in a traditional polishing technology are solved; and a new technical approach is provided for ultra-precision machining of the large-aperture optical element for the inertial confinement nuclear fusion device.

The invention provides an intelligent fatigue life prediction method based on deep learning, and belongs to the field of fatigue life prediction. The method comprises the following steps: acquiring a data set containing failure cycle times and mechanical properties of various alloy metals under different loading paths under stress control, and preprocessing the acquired data set; constructing a fatigue life estimation deep learning model, and training the fatigue life estimation deep learning model by using the preprocessed data set; and performing fatigue life prediction by using the trained fatigue life estimation deep learning model. According to the method, the problems that a traditional empirical formula is large in error and is only suitable for specific materials, loading history or load states when used for predicting the fatigue life are solved, and high-precision life prediction under multiple materials and multiple working conditions is achieved through the deep learning model.

The invention belongs to the technical field of welding stress control, and discloses an inner floating disc splicing stress parameter optimization method and system. Real-time working condition information such as the construction stage, the accumulated stress level, the overall structure rigidity and field environment parameters is combined with a dynamic adjustment mechanism of a stress optimization priority set; therefore, the problem that global optimization control is difficult to realize under multi-target conflict, construction stage evolution, cumulative stress change and field environment disturbance is solved, and the effect of realizing continuous balance and global optimization control among the targets in the whole construction period is achieved.

The invention relates to the technical field of structural design of hydraulic structures, and particularly discloses a method, a system and a terminal for determining a combined lining of a high-pressure water delivery tunnel. In the establishment process of a numerical calculation model of the combined lining, a composite drainage plate is equivalent to a uniform isotropic entity medium with the thickness of d; the mechanical property of the composite drainage plate is represented by adopting a comprehensive elastic modulus E, the structural stress of the composite drainage plate and the water pressure bearing ratio in the steel pipe are restrained through a steel pipe allowable stress control threshold value, a pipe piece crack resistance allowable stress control threshold value and a steel pipe bearing ratio control threshold value, and finally the d / E value range of the composite drainage plate is determined. Through the mode, a scientific and clear basis is provided for the value of the composite drainage d / E in the combined lining, the problem that the value is obtained depending on experience at the present stage is solved, and the subjectivity of manual selection is avoided.

The invention relates to the technical field of epoxy terrazzo terraces, and provides an epoxy terrazzo terrace system with a multi-layer composite anti-crack structure and a method, the epoxy terrazzo terrace system comprises a base layer, an anti-crack mortar layer, a three-layer composite anti-crack structure and an epoxy terrazzo surface layer which are sequentially arranged from bottom to top; the three-layer composite anti-cracking structure comprises an elastic resin layer, a rigid resin layer and a glass fiber cloth layer which are sequentially arranged from bottom to top. According to the epoxy terrazzo three-layer anti-crack structure based on rigid resin stress relay diffusion, the problems that an existing epoxy terrazzo system cracks frequently under the action of complex stress, the service life is short, and maintenance is frequent are effectively solved through a soft-rigid-fiber cooperative stress control mechanism.

The invention discloses a manufacturing process of a radial magnetic flux cylinder type motor iron core, and particularly relates to the technical field of motor iron core manufacturing, and the manufacturing process comprises the steps: employing magnetron sputtering to construct a gradient insulation coating on the surface of a nanocrystalline strip, and enabling the gradient insulation coating and silicon steel sheets to be alternately laminated to form a magnetic conduction-bearing composite structure; a yoke bionic honeycomb runner and a tooth magnetic barrier groove are machined through femtosecond laser, and magnetothermal coupling optimization is achieved; multidirectional progressive stamping forming is conducted in the pulsed magnetic field environment, and grain directional arrangement and interface metallurgical bonding are achieved in combination with femtosecond laser micro-connection; the integrated eddy current detection system regulates and controls press fitting parameters in real time, and stress regulation and control are completed through two-stage microwave annealing and ion beam treatment. According to the method, the magnetic circuit efficiency and the heat dissipation performance of the iron core are effectively improved, through material-structure-process collaborative innovation, the problems of magnetothermal imbalance, grain disorder, assembly accumulative errors and the like in traditional manufacturing are solved, and the operation stability and the service life reliability of the iron core under the high-frequency and high-load working condition are remarkably improved.

The invention belongs to the technical field of geotechnical engineering and rock mechanics testing, discloses a stress-strain mixed control-based rock stable failure testing method, and aims to solve the problem that a stress path cannot be maintained and brittle failure cannot be inhibited simultaneously after rock peak strength is detected in an existing true triaxial test. The method comprises the following core steps: firstly, determining a target stress state and a strain growth rate threshold value; then hydrostatic pressure loading is carried out; loading and unloading at a fixed proportional rate in a stress control mode; and when the strain rate reaches a threshold value, switching to a stress-strain hybrid control mode, converting the maximum principal stress direction into strain control to stabilize the damage process, and dynamically coordinating stresses in the other two directions based on real-time feedback to enable the whole damage process to maintain a preset stress path all the time. According to the invention, the complete and stable test of the pre-peak-post-peak mechanical behavior of the rock under any complex stress state can be realized, and a key technical support is provided for accurately verifying the strength criterion and researching the failure mechanism.

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

The invention relates to a wafer-level film stress regulation and control method, module and device. The method comprises the following steps: constructing a stress regulation and control module according to set parameters and a structure, and integrating the constructed stress regulation and control module at a set position of a semiconductor device; wherein the stress regulation and control module comprises a stress regulation and control layer, and the stress regulation and control layer adopts a metal / medium composite laminated structure; in the wafer manufacturing process, a target net stress value needed by a current wafer is obtained through a manufacturing execution system, the optimal thickness proportion needed by a stress regulation and control layer for achieving the target net stress value is calculated through an internal stress prediction model, and the manufacturing execution system generates a technological formula according to the optimal thickness proportion; and the deposition equipment is driven to deposit the stress regulation and control layer under the optimal thickness ratio. By designing the independent stress regulation and control module, it can be ensured that the crystallization quality, the stoichiometric ratio and the electrical / piezoelectric performance of the functional film are not sacrificed, and linear, accurate and predictable stress control over the wafer is achieved.

According to the copper alloy strip residual stress rapid evaluation and improvement method based on stress feedback, a warping measurement value is accurately mapped into a stress gradient parameter through a deformation and stress conversion model, and the aging bottleneck of a traditional method is broken through; according to the method, a double-track regulation and control mechanism driven by a delta sigma threshold value is constructed, medium and low stress regions are passivated and homogenized by means of cerium salt grain boundaries, a high stress region is subjected to targeted shape protection by means of a cerium salt and thiomalic acid composite film, dialectical unification of stress release priority and overall etching efficiency is achieved on the molecular level, and a scientific and efficient stress management and control mode is provided for copper alloy strip manufacturing.

The invention provides a tunnel chain type rockburst risk assessment method based on rock mass structural plane characteristics, and relates to the technical field of geological exploration. Through the processes of static prediction, dynamic early warning, advanced detection, structural plane parameterization and tendency index, typed identification and directional evaluation of chain rock burst are realized. Structural surface features (position, scale, dip angle and included angle) are taken as a core, a stress control type and a structural surface control type are firstly distinguished, then the occurrence risk of strain-structural surface slippage type rockburst and chain type rockburst is judged, and axial chain type rockburst, radial chain type rockburst and axial-radial chain type rockburst are further identified according to the included angle between a structural surface and a tunnel axis and the dip angle of the structural surface. According to the method, multiple chain type rockburst modes can be identified and evaluated at the same time, the limitation that in the prior art, only single-time rockburst can be evaluated or only one specific type of chain type rockburst is limited is made up, and a scientific basis is provided for forepoling and dynamic construction management.

The invention discloses a packaging structure and a forming method thereof. The packaging structure comprises a first rewiring structure, a second rewiring structure and a third rewiring structure, wherein the first rewiring structure comprises a dielectric layer and functional wires located in the dielectric layer; the functional chip is arranged on the first surface, and the functional chip is electrically connected with the first rewiring structure; and the stress control structure is located in the dielectric layer at the bottom of the functional chip, and the stress control structure is electrically isolated from the functional wires. The stress control structure can counteract the warping stress caused by the difference of the coefficient of thermal expansion (CTE) of materials, the warping degree of the packaging structure is reduced, and the introduction of the stress control structure enhances the overall mechanical strength of packaging, so that the cracking and layering risks caused by the thermal mechanical stress are reduced.

The invention provides a continuous and pulse coaxial double-beam welding method for a sheet titanium alloy corner joint process, and belongs to the technical field of laser welding. According to the method, continuous laser and pulse laser are adopted, coincidence arrangement of the two laser beams in space is achieved through a coaxial composite optical system to form a composite laser beam, the composite laser beam acts on a sheet titanium alloy corner joint assembled and fixed through a corner joint clamp, and the welding process is completed. The two laser beams are similar in wavelength, optical compatibility is good, and an optical system is stable. The coaxial composite heat source has the characteristics that the energy distribution gradient can be regulated and controlled, and the heat input is accurately controlled, so that the welding heat input can be effectively reduced while the mechanical property of the joint is ensured, and the residual stress is reduced to control the welding deformation. The sheet titanium alloy corner joint obtained through the method has the advantages of being uniform in welding seam forming, little in splashing, small in deformation and the like, and the technological requirements of the aerospace field for high-quality thin-wall titanium alloy structural parts are met.

The invention belongs to the technical field of power distribution networks, and particularly relates to a cable accessory and a design and preparation method thereof. The cable accessory comprises an insulating hollow tubular part and a stress pipe, the stress pipe is arranged at at least one end part of the insulating hollow tubular part, and the stress pipe is a dielectric stress pipe; the dielectric constant stress pipe is formed by applying an auxiliary electric field to the insulating liquid silicone rubber mixture injected outside the insulating hollow tubular part for a preset period of time and then carrying out orientation arrangement. The diameter of a cable accessory can be effectively reduced through the dielectric constant stress control pipe, heat dissipation and the maximum current-carrying capacity are enhanced, meanwhile, the device is suitable for special scenes with narrow spaces, and the electric field control effect is improved.

The invention discloses a welding analysis control process of a ceramic membrane group, which relates to the technical field of membrane welding and comprises the following steps: analyzing generation of microcracks of the ceramic membrane group to find out adjustable parameters related to the microcracks in the welding process; welding the ceramic diaphragm group and the lead wire to form a terminal electrode by actively regulating and controlling the adjustable parameters; the active regulation and control of the adjustable parameters comprises the steps that the temperature rise slope of the welding temperature ranges from 0.6 DEG C / s to 1.0 DEG C / s; the cooling slope of the welding temperature ranges from 0.4 DEG C / s to 0.5 DEG C / s; the reflux time is controlled to be 90-120 s; and the cooling time is controlled to be 200-300 seconds. The area of the soldering lugs is 30%-50% of the area of the terminal electrode, and the combination area of the plurality of soldering lugs is larger than 80% of the area of the terminal electrode. By adopting the scheme, thermal stress control is taken as a core, and welding crack failure is fundamentally eliminated by optimizing a welding temperature curve and accurately controlling the welding flux amount.

Examples disclosed herein relate to piezoelectric devices and methods for patterning piezoelectric layers for fabricating the piezoelectric devices. The methods include disposing a bottom electrode layer on a substrate, disposing a piezoelectric layer on the bottom electrode layer on a horizontal surface, varying an electrical bias to a pedestal during deposition of the piezoelectric layer, and forming a top electrode layer with a top electrode pattern on the piezoelectric layer. The substrate is supported by the pedestal. The piezoelectric device includes a substrate, a bottom electrode layer formed on the substrate, a piezoelectric layer formed on the bottom electrode layer on the horizontal surface, and a top electrode layer formed on the piezoelectric layer. The average stress of a plurality of stresses along the horizontal surface in the piezoelectric layer is about 50 MPa to about 300 MPa.

The invention discloses a closure control belt stress control construction method for a large public steel structure building. The closure control belt stress control construction method comprises the following steps that S1, a closure control belt is arranged; s2, design and installation of closure control belt nodes; s3, a floor support plate is installed above the second connecting structure, and a section of post-cast strip is reserved on the floor support plate; s4, steel bars of the post-cast strip are arranged; s5, monitoring structural deformation and environment temperature; s6, closure construction of the closure control belt; S7, acceptance inspection of the closure control belt; and S8, concrete pouring of a floor support plate within the range of the closure control belt. The super-long scale steel structure body is divided into the multiple construction bin blocks capable of independently stretching and deforming on the plane, and the closure control belts are planned between the adjacent bin blocks, so that the problem that the structure is sensitive to temperature and prone to generating harmful stress and deformation is solved. According to the method, the bin blocks are allowed to stretch out and draw back freely in the construction period, structural internal force and deformation caused by temperature changes are remarkably reduced, and therefore the safety and durability of the structure are improved.

The invention discloses a method for enhancing fatigue performance of a Ti175 porous titanium alloy, which comprises the following steps of: under the protection of inert atmosphere, quickly putting a sample into a central isothermal area of a tubular furnace preheated to a first target temperature, continuously heating to a second target temperature, preserving heat, converting an original structure into a double-state structure, and cooling to room temperature at a controlled cooling rate; under inert atmosphere protection, the sample is heated to a third target temperature and subjected to heat preservation, then cyclic loads within the elastic range are applied in a stress control mode, and after loading is finished, the sample is cooled to the room temperature at the controlled cooling rate; under the air or inert atmosphere, the sample is rapidly placed into a box-type furnace preheated to a fourth target temperature, the temperature continues to rise to a fifth target temperature, heat preservation is conducted for a short time, residual stress is released, a surface oxygen solid solution strengthening layer is formed, and then the sample is cooled to the room temperature at the controlled cooling rate.

The present application relates to the technical field of nuclear fusion device processing and manufacturing, and particularly relates to a double-layer stainless steel square neck pipe and a processing and manufacturing method thereof. The square neck pipe comprises an inner shell formed by butt welding of multiple arc-shaped inner shell pieces, an outer shell formed by butt welding of arc-shaped outer shell pieces and straight outer shell pieces, a web plate connecting the inner and outer shells, and a support guide column welded to the outer arc surface of the inner shell. The double-layer stainless steel square neck pipe can be modularly split and cut, the arc-shaped pieces are subjected to solid solution treatment with a mold, the inner shell assembly welding, web plate welding, low-temperature annealing, support guide column welding and outer shell assembly welding are sequentially performed, and in the key welding process, small heat input welding process is adopted and laser scanning monitoring is performed at intervals. Through model splitting, stress control and whole-process precision monitoring, the present application can inhibit the processing and welding deformation of austenitic stainless steel, realize high-precision manufacturing of the double-layer square neck pipe with millimeter-level profile, and avoid the risk of traditional straightening process.

The aluminum alloy thin-wall ring machining stress control method comprises the following steps of rough machining of a blank, low-temperature aging of a semi-finished blank, low-frequency vibration of the semi-finished blank, finish machining treatment and final inspection, the low-temperature aging temperature is increased to 120-150 DEG C, heat preservation is conducted for 2-4 h, and the low-frequency vibration frequency is 10-30 Hz; the machining tool comprises a support, a vertical telescopic component, a universal connecting component and an elastic clamping component. The vertical telescopic part is arranged on the upper surface of the lower plate, the universal connecting part comprises a structural part connected with the vertical telescopic part, and the structural part is provided with a plurality of first connecting accessories connected with the elastic clamping part; the elastic clamping component is provided with a plurality of first connecting shafts connected with the universal connecting component in a matched mode, the upper portions of the first connecting shafts are connected with elastic clamping components, the first connecting shafts are sleeved with fixed tightening sliding sleeves, and the fixed tightening sliding sleeves are arranged on the upper plate. Forward pressure can be removed, synchronous clamping is guaranteed, clamping deformation is reduced, and machining of the front face and the back face can be achieved.

The patent discloses a residual stress control method and device for a powder plasma cladding layer of a valve face of a gas valve, and belongs to the field of welding additive manufacturing, which is used for inhibiting the residual tensile stress inside the powder plasma cladding layer of the valve face of the gas valve, and specifically is a powder plasma cladding layer pressing device for the valve face of the gas valve and a cladding residual stress control strategy. The cladding layer pressing device is composed of a valve rod clamping device, a rotary table, a valve end face pressing device and a valve face pressing device. The load applied to the gas valve is controlled during the welding process and after the welding. The cladding residual stress control strategy includes the determination of the range and flow of the cleaning area, the dynamic pressure calculation and the determination of the force application position during the cladding process and the load application after the welding.

The invention discloses a forming method of an internal insulation layer containing a super-thick T-1 material. The forming method comprises the following specific steps: step 1, decomposing a prefabricated part; step 2, performing multi-step hot-pressing lamination; step 3, curing stress control; and 4, inspecting a finished product. According to the method, high-quality forming of the super-thick T-1 material inner heat insulation layer is achieved through the combined process of heat insulation layer structure splitting, precise design, multi-step hot pressing and gradient regulation and control, setting is precise and reliable, the interlayer interface bonding strength is improved by 30% or above, the operation difficulty is remarkably reduced, and the production period of an existing process is shortened by 20% compared with that of a traditional process.

The invention discloses a silicon-based substrate structure for semiconductor epitaxial stress regulation and control and a preparation method of the silicon-based substrate structure, and belongs to the technical field of semiconductor materials. The method comprises the following steps: firstly prefabricating vacancy gradient in a silicon body by adopting silicon self-ions or inert heavy ions, and then performing helium ion implantation with a relatively low dose, so that helium atoms selectively nucleate in the formed vacancy gradient and grow through unified annealing to obtain a pore volume fraction which continuously changes along with depth. According to the invention, through a division cooperation mechanism of'vacancy prefabrication 'and'helium pore-forming', a coupling relationship between vacancy and gas is not generated by single helium injection any more, so that a pore gradient and a Young modulus gradient which can be designed and continuously adjusted in the thickness direction are realized, the controllability, stability and process compatibility of a pore-forming structure are remarkably improved, and the production cost is reduced. By constructing a modulus gradient structure in the silicon body, the problems of wafer warping, device layer cracking, bonding failure and the like are reduced.

The invention discloses a device and a method for mounting a convex shaft into a special-shaped row-mounted contact piece, and belongs to the technical field of precision assembly. The device comprises a bottom plate, a vertical plate, a mounting plate capable of moving up and down, a supporting seat with a bearing structure, a supporting shaft and at least one pair of spring pieces of an inverted V-shaped structure. The supporting shaft is driven by lifting of the mounting plate to do reciprocating motion, so that the supporting shaft is clamped into or separated from the inverted-V-shaped structures of the spring pieces, and the pointed ends of the at least one pair of spring pieces are controlled to be switched between the opening state and the closing state. During assembly, the convex shaft is firstly arranged on the supporting seat, and then the mounting plate is moved downwards to close the spring piece; then putting into a product shell, and inserting the tip of the spring piece between the pins of the contact piece; and finally, the mounting plate is moved upwards, the spring piece is expanded by the convex shaft, and the contact pin is expanded synchronously, so that the convex shaft is smoothly guided into the cavity to complete assembly. Precise guiding and stress control of cam shaft assembling are achieved, pin deformation is effectively prevented, and assembling efficiency and quality consistency are improved.

A workpiece includes a doped p-type substrate, a co-doped P+ epitaxial silicon layer disposed on the doped p-type substrate, and a boron-doped P− epitaxial layer disposed on the co-doped P+ epitaxial silicon layer. The co-doped P+ epitaxial silicon layer is co-doped with germanium and boron. A ratio of the germanium to the boron in the co-doped P+ epitaxial silicon layer may be from 10 to 16.

The utility model provides an equipment protection device, and the device comprises a first part which is provided with a first stress detection module and a plurality of magnets; the second part is provided with a second stress detection module, a magnetic intensity control module and a plurality of magnetic suction coils; the magnetic intensity control module is in communication connection with the first stress detection module and the second stress detection module. The first stress detection module is used for detecting the value of pressure applied to the first component; the second stress detection module is used for detecting the value of pressure applied to the second component; and the magnetic intensity control module is used for controlling the magnitude of current flowing through each magnetic attraction coil according to the pressure values detected by the first stress detection module and the second stress detection module so as to control the magnitude of adsorption force between each magnetic attraction coil and the corresponding magnet. The adsorption force can be controlled according to the stress borne by the first component and the second component, and equipment falling caused by insufficient adsorption force between the first component and the second component is avoided.

The application discloses a preparation method of a thin film bulk acoustic wave device with a cavity structure obtained by stress control, which comprises the following steps: forming a natural oxidation layer on a substrate, setting an effective area on the natural oxidation layer, respectively forming a piezoelectric seed layer and a sacrifice layer in the effective area, forming a first electrode on the piezoelectric seed layer, and the height of the sacrifice layer is not lower than the height sum of the piezoelectric seed layer and the first electrode, and removing the natural oxidation layer outside the effective area to expose the substrate; depositing a piezoelectric thin film with internal stress on the exposed surfaces of the substrate, the sacrifice layer and the first electrode, depositing a second electrode on the piezoelectric thin film, connecting a metal pad layer with the first electrode and the second electrode, removing the sacrifice layer and the natural oxidation layer in the effective area through a sacrifice layer release hole to form a cavity. The method can effectively solve the problem of difficult removal of the sacrifice layer in the traditional process, and the preparation method is simple and efficient. The application further discloses a cavity thin film bulk acoustic wave device.

The invention belongs to the technical field of boiler optimization control, and particularly relates to a boiler water wall tube thermal stress optimization control method and system. Firstly, a historical data set is constructed by obtaining design parameters, operation characteristics and historical operation data of the boiler water cooling wall, the heat transfer process is analyzed and key thermal parameters are determined by combining the boiler working principle and the thermodynamic principle, and a physical model equation is established. And estimating and optimizing model parameters by using a historical data set and a least square method to obtain a wall temperature change model suitable for an actual boiler. And monitoring operation data of the water wall tube in real time, inputting the operation data into the optimized model after preprocessing, and calculating and reflecting a wall temperature change rule in real time. The future wall temperature change trend is predicted based on the MPC algorithm, optimization solution is carried out on the premise that constraint conditions are met, an optimal control input sequence is obtained, and effective regulation and control of the wall temperature are achieved. According to the scheme, the problem of pipe tension fracture caused by thermal stress can be prevented, and safe and stable operation of the boiler is ensured.