Force and displacement double-control damping energy consumption device

Abstract

The invention discloses a force and displacement double-control damping energy dissipation device which comprises a first energy dissipation assembly and a second energy dissipation assembly, the two ends of the first energy dissipation assembly and the two ends of the second energy dissipation assembly are connected with a boiler steel frame and a boiler body through hinge supports correspondingly, and the length of the first energy dissipation assembly is equal to that of the second energy dissipation assembly; the first energy dissipation assembly comprises a section steel beam, a plurality of bolt holes are distributed in the middle of the section steel beam, limiting grooves are formed in the positions, close to the two ends, of the section steel beam, slender hole-shaped shear failure keys are arranged on the sides, close to the bolt holes, of the limiting grooves, and connecting cover plates are fixed to the bolt holes through bolts. The second energy dissipation assembly is a speed type damper. The problem that in the prior art, displacement limiting in the using stage and large displacement energy consumption generated in the earthquake stage cannot be met at the same time can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field related to building structures, and more specifically, to a damping energy dissipation device capable of dual-controlling force and displacement. Background Art

[0002] Currently, thermal power generation accounts for over 50% of my country's total electricity generation. In large thermal power plants, the boiler steel structure is a crucial component of the system. It consists of a steel frame and the boiler itself. The boiler itself is suspended from the top beam of the frame by numerous hangers, with a certain distance between the boiler and the frame to ensure that the boiler expands and contracts with temperature fluctuations during operation. Traditional boiler steel frames typically incorporate rigid stoppers at the expansion centers around the boiler to withstand the loads (i.e., the expansion forces) generated by the expansion. These stoppers maintain the position of the expansion centers by withstanding the expansion forces. Furthermore, under earthquake conditions, the stoppers transmit the horizontal seismic forces generated by the boiler to the main frame. The boiler body weighs two to three times the weight of the steel structure itself, often reaching 10,000 tons. During earthquakes, the boiler body exerts significant horizontal inertial forces on the main frame, necessitating increased cross-sectional dimensions of the main frame's beams and columns to ensure structural safety under earthquake conditions.

[0003] In the structural system, the boiler body is suspended on the top of the main frame. The boiler body itself can be regarded as a large mass coordination damper. Setting a displacement-type energy dissipation device (such as anti-buckling brace) between the boiler body and the main frame can also effectively dissipate the energy generated in the earthquake, reduce the force exerted by the boiler body on the main frame, and reduce the amount of steel used. However, since the temperature of the boiler body in the boiler frame gradually increases during normal operation, the design requires that the free expansion and contraction deformation of the boiler body in the horizontal and vertical directions be released. At the same time, the boiler body and the main steel frame must be reliably connected to ensure the effective transmission of seismic forces under earthquakes. If anti-buckling supports are used to connect the steel frame and the boiler body, although the deformation of the boiler body under temperature can be effectively limited during use, the limit device will limit the relative deformation between the boiler body and the main steel frame under earthquakes, and the energy dissipation capacity is limited. If traditional velocity damping devices are used, although a certain relative displacement can be generated between the main frame and the boiler body under earthquakes, and the velocity damper is used to dissipate some energy, the boiler body heats up slowly during normal use. At this time, the velocity damper connecting the main steel frame and the boiler body cannot effectively limit the deformation of the boiler body during the heating process during use. Therefore, traditional anti-buckling supports or velocity dampers used alone cannot simultaneously ensure the effective transmission of the inertial force of the boiler body during normal use and under earthquakes. Summary of the Invention

[0004] One purpose of the present invention is to provide a damping energy dissipation device with dual control of force and displacement, which can help overcome the problem that the existing technology cannot simultaneously meet the requirements of limiting displacement during the use phase and generating large displacement energy dissipation during the earthquake phase.

[0005] In order to achieve these objects and other advantages of the present invention, according to one aspect of the present invention, the present invention provides a damping energy dissipation device with dual control of force and displacement, including a first energy dissipation component and a second energy dissipation component, wherein the first energy dissipation component and the second energy dissipation component are respectively connected to the boiler steel frame and the boiler body at both ends by hinged supports, and the length of the first energy dissipation component is equal to that of the second energy dissipation component; the first energy dissipation component includes a steel beam, a plurality of bolt holes are distributed in the middle of the steel beam, and a limit groove is provided near the two ends of the steel beam, and a slender hole-shaped shear failure key is provided on the side of the limit groove near the plurality of bolt holes, and a connecting cover plate is fixed at the plurality of bolt holes by bolts; the second energy dissipation component is a velocity damper.

[0006] Furthermore, the first energy-absorbing component also includes an extension beam, the ends of the steel beam are connected to the partition, one end of the extension beam is connected to the partition, and the other end of the extension beam is connected to the end plate, and the end plate is connected to the hinged support, and stiffening ribs are provided between the partition, the end plate and the extension beam.

[0007] Furthermore, the limiting groove is in a rectangular shape, the side of the limiting groove away from the multiple bolt holes is a straight line, and the side close to the multiple bolt holes is an inwardly concave curve.

[0008] Furthermore, the cross-sections of the steel beam and the extension beam are cross-shaped, I-shaped or box-shaped.

[0009] Furthermore, it also includes a force sensor, a displacement sensor, a controller and an actuator; the force sensor and the displacement sensor respectively monitor the force and relative displacement between the boiler steel frame and the boiler body in real time, and feed back the data to the controller; the controller dynamically adjusts the damping coefficient of the velocity damper based on a preset force-displacement dual-control algorithm.

[0010] Furthermore, the force-displacement dual-control algorithm adopts a dual fuzzy logic controller, including a first fuzzy logic sub-controller and a second fuzzy logic sub-controller; the first fuzzy logic sub-controller takes the error value and the change rate of the force sensor monitoring value and the preset force threshold as input variables, and outputs a first damping correction coefficient; the second fuzzy logic sub-controller takes the error value and the change rate of the displacement sensor monitoring value and the preset displacement limit as input variables, and outputs a second damping correction coefficient; the controller is configured with a weighted fusion module, which dynamically fuses the first damping correction coefficient and the second damping correction coefficient according to a weight ratio of 0.6-0.8:0.2-0.4 to generate a final damping control instruction.

[0011] Furthermore, the actuator includes an electro-magnetic variable damping adjustment unit, which completes the damping coefficient adjustment within 10ms according to the final damping control instruction, and is provided with a self-learning module, which extracts features of historical control data through a neural network algorithm and corrects the membership function parameters of the fuzzy logic controller in real time.

[0012] Furthermore, short-term features and long-term features are extracted from historical control data, wherein the short-term feature is the frequency domain amplitude spectrum of the force / displacement error within the sliding time window, and the long-term feature is the cumulative statistics of the damping coefficient adjustment frequency and amplitude during 24 consecutive hours of operation; the short-term features and long-term features are fused and analyzed through a neural network, and the interval boundary values ​​corresponding to "large force error" and "large displacement error" in the membership function of the fuzzy logic controller are dynamically corrected; the self-learning module is provided with an abnormal data filtering unit, and when it is monitored that the instantaneous acceleration of the boiler body exceeds 80% of the preset safety limit, the feature extraction of the current period data is suspended.

[0013] Furthermore, the controller calculates the force error change rate and the displacement error change rate in real time, and compares them with the preset impact threshold and displacement threshold; when the force error change rate is ≥ the impact threshold and the displacement error is < the displacement threshold, it is determined to be a sudden impact state, and a weight ratio of 0.8:0.2 is used; when the force error change rate is < the impact threshold and the displacement error is ≥ the displacement threshold, it is determined to be a steady-state vibration state, and a weight ratio of 0.6:0.4 is used; the rest of the cases are determined to be transition states, and the dynamic weight ratio is calculated by the hyperbolic tangent function based on the ratio of the displacement error change rate to the maximum change rate.

[0014] Furthermore, the dynamic weight ratio calculation configuration in the transition state is as follows: based on the ratio of the real-time value of the displacement error change rate to the preset maximum change rate, a smooth transition weight ratio curve is generated through the nonlinear mapping characteristics of the hyperbolic tangent function; the controller presets a displacement error change rate threshold interval, and when the real-time ratio is within the threshold interval, the dynamic weight ratio continuously changes from 0.6:0.4 to 0.8:0.2 as the ratio increases, and the weight ratio change rate reaches a peak in the middle of the interval and approaches zero at both ends; the actuator adjusts the damping coefficient according to the gradual weight ratio.

[0015] The present invention has at least the following beneficial effects: The present invention effectively solves the problem that traditional energy dissipation devices used in boiler steel frame structural systems cannot simultaneously meet the requirements of limiting displacement during the use phase and generating large displacement energy dissipation during earthquakes. The present invention can use the connection nodes of steel components to provide sufficient bearing capacity during normal use to meet the purpose of limiting the overall deformation of the boiler body during the boiler heating process during normal use. At the same time, under the action of a large earthquake, the steel connection nodes can produce large displacement through reasonable design, causing large sliding between the boiler body and the steel frame, thereby fully utilizing the energy dissipation purpose of the speed-type energy dissipation device during this phase. The new structural method proposed by the present invention uses bolts to connect the steel nodes. Under the action of small earthquakes, the bolted connection nodes dissipate energy through friction between the contact surface of the cover plate and the cross-shaped steel component. Taking advantage of the good shear yield deformation resistance of steel, through reasonable design, the connection nodes can form a shear slip failure surface on the steel component at the shear failure key connection line under moderate and large earthquakes, fully utilizing the advantages of the steel plate's large deformation capacity and strong energy dissipation capacity under shear force. The shear yield and plastic fracture of the steel plate dissipate part of the energy, reducing the interaction force between the boiler and the steel frame.

[0016] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present application; Figure 2 for Figure 1 Cross-section at AA; Figure 3 This is a schematic structural diagram of a steel beam according to an embodiment of the present application; Figure 4 This is a schematic structural diagram of a limiting groove according to an embodiment of the present application. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] It should be understood that terms such as "having," "comprising," and "including" used in the embodiments of this application do not exclude the presence or addition of one or more other elements or combinations thereof. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are intended only to explain the relative positional relationships and movement of components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. When an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element. References to "first," "second," etc. in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features designated as "first" or "second" may explicitly or implicitly include at least one of such features.

[0020] It should be noted that the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0021] like Figure 1-4 As shown, an embodiment of the present application provides a damping energy dissipation device with dual force and displacement control, comprising a first energy dissipation component and a second energy dissipation component, both of which are connected to the boiler steel frame and the boiler body via hinged supports 12 at their ends, and are of equal length. The first energy dissipation component comprises a steel beam 1, the center of which is provided with multiple bolt holes 2, and limit slots 3 are provided near the ends. The limit slots 3 are provided with elongated, hole-shaped shear failure keys 4 on the side near the bolt holes 2. The ends of the shear failure keys 4 are circularly transitioned to reduce stress concentration. The multiple bolt holes 2 are fixedly connected to the cover plate 5 by bolts 6. The second energy dissipation component is a velocity damper 11.

[0022] The steel beam 1 can be made of existing steel materials such as Q235 steel, Q345 steel or Q390 steel, and the cross-section can be cross-shaped, I-shaped or box-shaped, and can be made by rolling or welding. The bolts 6 can be high-strength bolts or ordinary bolts, and the connecting cover plate 5 is a rectangular or circular steel plate, the size of which is determined according to the design load. The width of the limit groove 3 needs to be designed according to the maximum relative displacement allowed by the boiler body, usually 30mm to 80mm, and the length of the slender hole of the shear breaking key 4 can be 50mm to 100mm, with an aperture of 10mm to 20mm. The hinged support 12 is installed on the end plate 8 of the first energy absorbing component and the second energy absorbing component or the end of the steel beam 1, the connecting cover plate 5 is attached to both sides of the steel beam 1 and fastened by bolts 6, and the limit groove 3 and the shear breaking key 4 are located in the preset area at both ends of the steel beam 1.

[0023] When assembling the device, first machine a bolt hole 2 in the middle of the steel beam 1, open a limit groove 3 and a shear breaking key 4 at both ends, and fix the connecting cover plate 5 to both sides of the steel beam 1 with bolts 6 to form a slidable bolt connection node. Then, the first energy-absorbing component and the second energy-absorbing component are connected in parallel through the hinged support 12, and the two ends are connected to the boiler steel frame and the boiler body respectively. During normal operation, the bolt connection node limits the displacement of the boiler body through friction and the initial stiffness of the shear breaking key 4; under the action of an earthquake, the steel at the shear breaking key 4 undergoes shear slip or yielding, allowing a certain relative displacement, and the velocity damper 11 dissipates energy synchronously to achieve dual-control energy consumption.

[0024] In another embodiment, the first energy absorbing component of the dual-control force and displacement damping energy absorbing device also includes an extension beam 10, partitions 7 are welded to both ends of the steel beam 1, one end of the extension beam 10 is welded or bolted to the partition 7, and the other end is welded to an end plate 8, the end plate 8 is connected to the hinged support 12, and stiffening ribs 9 are welded between the partition 7, the end plate 8 and the extension beam 10 to enhance the node strength.

[0025] The cross-sectional form of the extension beam 10 is consistent with that of the steel beam 1 and can be cross-shaped, I-shaped, or box-shaped. The material used is existing steel materials such as Q235 steel and Q345 steel. The partition 7 can be a circular, square, or polygonal steel plate. The thickness is determined according to the force calculation and is usually 10mm to 20mm. The stiffening ribs 9 are strip-shaped steel plates and are symmetrically arranged at the connection between the partition 7 and the extension beam 10, and the end plate 8 and the extension beam 10, with a spacing of no more than 300mm. The size of the end plate 8 must match the hinged support 12, and the bolt hole positions must be opened according to the support specifications.

[0026] During implementation, the bulkhead 7 is first welded to both ends of the steel beam 1. The extension beam 10 is then butted against the bulkhead 7, connected using groove welding or high-strength bolts to ensure joint rigidity. End plates 8 are welded to the free ends of the extension beam 10. Stiffening ribs 9 are welded on both sides of the weld between the bulkhead 7 and the extension beam 10, and in the connection area between the end plates 8 and the extension beam 10. Finally, the end plates 8 are connected to the boiler structure via hinged supports 12 on the end plates 8. This structure extends the force transmission path through the extension beam 10, and the stiffening ribs 9 effectively improve the joint's shear and bending resistance, making the connection more reliable when subjected to reciprocating loads and preventing localized damage caused by stress concentration.

[0027] In another embodiment, the limit groove 3 of the damping energy dissipation device with dual control of force and displacement is rectangular, the side away from the bolt hole 2 is a straight line 3-2, and the side close to the bolt hole 2 is an inward concave curve 3-1. The curve 3-1 can be in the form of an arc or a parabola, and the end has a smooth transition with the straight line 3-2.

[0028] The machining of the limit slot 3 requires reserved areas at both ends of the steel beam 1 and is performed using CNC cutting equipment. The length of the straight segment 3-2 is determined by the cross-sectional height of the steel beam 1, typically ranging from 150mm to 400mm. The arc radius of the curved segment 3-1 can be 30mm to 60mm. The overall width of the limit slot 3 is 10mm to 20mm greater than the sliding stroke of the shear failure key 4. The material used is the same as that of the steel beam 1, using Q235 or Q345 steel. The edges of the slot are chamfered to eliminate burrs.

[0029] After installation, when the boiler body and the steel frame undergo relative displacement, the steel member housing the shear failure key 4 slides along curve 3-1. This curved design ensures more uniform stress distribution during sliding, reducing localized stress concentration. When the displacement exceeds the design limit, the sliding member contacts the straight section 3-2 of the limit groove 3, forming a rigid stop, preventing excessive displacement of the boiler body and damage to the associated piping. This structure balances the permissible displacement range with safety limits, ensuring energy efficiency while ensuring equipment safety.

[0030] In another embodiment, the cross-sections of the steel beam 1 and the extension beam 10 of the dual-control force and displacement damping energy dissipation device are cross-shaped, I-shaped or box-shaped, wherein the cross-shaped section is formed by vertically welding two steel plates, the I-shaped section is formed by rolling or welding, and the box-shaped section is formed by welding four steel plates to form a closed cavity.

[0031] The cross-sectional dimensions of the steel beam 1 and extension beam 10 are determined based on load calculations. For example, the flange width of an I-section is 150mm to 400mm, and the web thickness is 8mm to 20mm; the side length of a box section is 200mm to 600mm, and the wall thickness is 10mm to 30mm. Common construction steels such as Q235B and Q345B can be used, and E43 or E50 welding rods are used for welding to ensure weld quality meets national standards.

[0032] During processing, the cross-section requires the steel plate to be cut first and then vertically welded using a positioning fixture; the I-section can be directly purchased from hot-rolled steel or welded; the box-section requires the bottom plate, web plate, and top plate to be welded in sequence, with stiffeners installed inside at the designed spacing. When the steel beam 1 and the extension beam 10 are connected through the partition 7, full penetration welding or high-strength bolt friction connection is used to ensure effective force transmission. Different cross-sectional forms can adapt to different load conditions. The cross-section is suitable for bidirectional bending scenarios, and the box-section is suitable for areas with high torsional requirements, improving the overall mechanical properties of the device.

[0033] In another embodiment, the dual-force and displacement-controlled damping energy dissipation device further comprises a force sensor, a displacement sensor, a controller, and an actuator. The force sensor, which can be a resistive strain gauge or vibrating wire type, is installed at the connection between the articulated support 12 and the boiler steel frame to monitor the axial force in real time. The displacement sensor, which can be a wire-type or laser-type, is fixed to the relative displacement path between the boiler body and the steel frame to monitor their relative displacement. The controller is an industrial-grade PLC or embedded computer with a built-in force-displacement dual-control algorithm. The actuator is an electromagnetic-magnetic variable damping adjustment unit connected to the damping channel of the velocity damper 11.

[0034] The preset force threshold is determined based on the expansion force during normal boiler operation, typically between 50kN and 200kN. The displacement limit is set based on the allowable range of boiler expansion and contraction, typically between 20mm and 100mm. The sampling frequency of the force and displacement sensors is no less than 100Hz, and the data is transmitted to the controller via a shielded cable. The controller performs control calculations every 20ms to generate damping coefficient adjustment commands.

[0035] During operation, sensors collect force and displacement signals in real time. A controller calculates the current force error (the difference between the measured value and the force threshold) and displacement error (the difference between the measured value and the displacement limit). Based on a pre-set algorithm, it dynamically adjusts the damping coefficient of the velocity damper 11. For example, during normal temperature rise, if the force error is less than the threshold, the controller maintains a low damping state, allowing the boiler to expand or contract slightly. During an earthquake, if the displacement error exceeds the limit, the controller increases the damping coefficient, dissipating vibration energy through the velocity damper 11, achieving adaptive control of the operating conditions.

[0036] In another embodiment, the dual-force-displacement control algorithm for a damping energy dissipation device with dual force and displacement control utilizes a dual fuzzy logic controller, comprising a first fuzzy logic sub-controller and a second fuzzy logic sub-controller. The first sub-controller takes as input the force error (domain [-300kN, 300kN]) and the rate of change of the force error (domain [-50kN / s, 50kN / s]) and outputs a first damping correction coefficient (range 0.8-1.2). The second sub-controller takes as input the displacement error (domain [-150mm, 150mm]) and the rate of change of the displacement error (domain [-20mm / s, 20mm / s]) and outputs a second damping correction coefficient (range 0.6-1.4). A weighted fusion module, implemented in software, fuses the two correction coefficients according to the operating conditions, weighted in a ratio of 0.6-0.8:0.2-0.4, to generate the final control command.

[0037] The fuzzy logic controller's membership function uses a triangular or trapezoidal distribution. The "large force error" interval boundaries are initially set to ±150 kN, and the "large displacement error" interval boundaries are initially set to ±80 mm. The controller's human-machine interface allows for manual adjustment of the domain range and weight parameters to accommodate the design requirements of different boiler structures.

[0038] When the system detects a significant increase in force error (such as a sudden surge in inertial force at the beginning of an earthquake), the first sub-controller outputs a larger correction coefficient, focusing on limiting force growth. If displacement continues to increase (such as when the structure enters the plastic phase), the second sub-controller takes the lead, increasing damping in the displacement direction. This dual-input, dual-output control strategy avoids the limitations of single-parameter control, making damping adjustments more tailored to complex load conditions and improving the device's energy efficiency and structural protection.

[0039] In another embodiment, the actuator of the dual-force and displacement-controlled damping energy dissipation device includes an electro-magnetic variable damping adjustment unit. This unit uses a proportional solenoid or magnetorheological damping valve, capable of adjusting the damping coefficient within 10ms. This response time meets the control requirements for high-frequency seismic loads. The self-learning module is based on a BP neural network algorithm. The input layer is composed of 10 eigenvalues ​​from historical control data, including force error, displacement error, and damping coefficient adjustment. The hidden layer has 20 neurons, and the output layer contains the correction parameters of the membership function.

[0040] Historical data is collected over a one-year period. Short-term feature extraction uses a 5-second sliding window to calculate the frequency-domain amplitude spectrum of the force / displacement error (via Fast Fourier Transform). Long-term feature statistics include the frequency, average amplitude, and standard deviation of damping coefficient adjustments over a continuous 24-hour period. The self-learning module updates its parameters every 24 hours. If the instantaneous acceleration of the boiler exceeds the preset safety limit of 1.6g (80% of the 2g limit), the abnormal data filtering unit automatically skips the data within the previous 10 seconds to prevent impact signals from extreme operating conditions such as earthquakes from interfering with model training.

[0041] The electro-magnetic variable damping adjustment unit is connected to the controller via a CAN bus and receives 16-bit digital control signals, achieving an adjustment accuracy of 1% of full scale. The self-learning module continuously optimizes the membership function of the fuzzy logic controller to gradually adjust the boundary values ​​of the "large force error" and "large displacement error" intervals. For example, after six months of operation, the "large force error" boundary was dynamically adjusted from ±150kN to ±180kN based on actual operating conditions. This allows the control strategy to better adapt to the actual performance of the equipment after aging or load changes, thereby improving the long-term reliability of the device.

[0042] In another embodiment, when the self-learning module of the damping energy dissipation device with dual control of force and displacement extracts historical control data, the short-term feature analysis uses a 1s sliding time window to calculate the 10Hz, 20Hz, and 30Hz frequency band amplitude spectra of the force / displacement error signal through fast Fourier transform as the input features of the neural network; the long-term feature statistics include the frequency of damping coefficient adjustment (unit: times / day), the average value and variance of the adjustment amplitude within 24 consecutive hours, reflecting the energy consumption demand of the system during the normal operating cycle.

[0043] The neural network model employs a three-layer structure, with 15 nodes in the input layer (5 short-term frequency domain features + 10 long-term statistical features), a hidden layer using the ReLU activation function, and a three-node output layer, corresponding to the interval boundary values ​​and weight ratio corrections for "large force error" and "large displacement error." An abnormal data filtering unit monitors the acceleration signal of the boiler in real time. When the instantaneous acceleration exceeds 1.6g, a data shielding mechanism is triggered. The shielding lasts for the time it takes for the impact signal to decay to below 0.2g (typically no more than 2s), ensuring that abnormal data under extreme operating conditions is not included in model training.

[0044] Through long-term self-learning, the system can identify energy consumption patterns in different seasons (temperature changes cause fluctuations in boiler expansion forces) and different seismic wave types (high-frequency or low-frequency waves), automatically adjusting the parameters of the fuzzy logic controller. For example, in winter, when boiler temperature differences are large, the "large force error" threshold is automatically lowered by 20kN, pre-activating force control mode to prevent excessive expansion forces from overloading connection nodes. When encountering low-frequency seismic waves, the weighting of the displacement error change rate is increased, enabling the damper to respond more quickly to large structural displacements, thereby improving the environmental adaptability and intelligent control capabilities of the energy-consuming device.

[0045] In another embodiment, the controller of the dual-force and displacement-controlled damping energy dissipation device has a preset impact threshold of 50 N / s and a displacement threshold of 10 mm. The maximum displacement error change rate is determined by historical data statistics, taking the 95th percentile of the monitoring values ​​over the past year. When the force error change rate is ≥50 N / s and the displacement error is <10 mm, it is determined to be a sudden impact state. At this time, the force growth is controlled first, and a weight ratio of 0.8:0.2 is used to rapidly increase the stiffness component of the damper. When the force error change rate is <50 N / s and the displacement error is ≥10 mm, it is determined to be a steady-state vibration state, focusing on displacement control, and a weight ratio of 0.6:0.4 is used to enhance the energy dissipation component of the damper.

[0046] During the transition state, the controller calculates the ratio of the displacement error rate of change to the maximum rate of change, k (0 ≤ k ≤ 1), in real time. It then calculates the dynamic weight ratio using the hyperbolic tangent function f(k) = 0.6 + 0.2 × tanh(2k - 1). The slope parameter 2 of the tanh function ensures that the weight ratio changes fastest in the middle of the threshold range (k = 0.5) and flattens out at the ends (k → 0 or k → 1). The preset displacement error rate of change threshold range is [0.2, 0.8] times the maximum rate of change. When k exceeds this range, the fixed weight ratios at both ends (0.6:0.4 or 0.8:0.2) are used.

[0047] In actual applications, the controller updates the operating condition determination results every 10ms. As the system gradually transitions from steady-state vibration to strong earthquake, the displacement error change rate k gradually increases from 0.3 to 0.7, and the weight ratio smoothly transitions from 0.6:0.4 to 0.8:0.2, preventing a sudden jump in the damping coefficient from causing secondary impacts on the structure. This nonlinear mapping based on the hyperbolic tangent function makes the weight ratio adjustment more consistent with the structural dynamic response characteristics, achieving a seamless transition between sudden loads and steady-state vibration, improving the device's control accuracy and structural protection effectiveness under complex seismic conditions.

[0048] In another embodiment, in calculating the transient dynamic weight ratio of a dual-force-displacement damping energy dissipation device, the input parameter of the hyperbolic tangent function is the normalized ratio k of the real-time displacement error rate of change to the preset maximum rate of change. The function expression is: weight ratio = 0.6 + 0.2 × tanh [(k - 0.5) × 4], where 4 is the coefficient for adjusting the slope, making the weight ratio more sensitive to changes within the threshold range [0.3, 0.7], and tanh is the hyperbolic tangent function. The controller presets the displacement error rate of change threshold range as [0.3 × v_max, 0.7 × v_max], where v_max is the maximum allowable rate of change calculated based on the dynamic characteristics of the boiler structure, typically determined through time-history analysis.

[0049] When k is within the threshold range, the weight ratio changes continuously from 0.6:0.4 to 0.8:0.2 as k increases. For example, when k = 0.3, the weight ratio is 0.65:0.35, when k = 0.5, it is 0.7:0.3, and when k = 0.7, it is 0.75:0.35. The rate of change reaches its peak at k = 0.5 and approaches zero at both ends, k = 0.3 and k = 0.7, to avoid sudden changes in the weight ratio. The actuator continuously adjusts the damping coefficient through the electromagnetic variable damping adjustment unit based on the gradually changing weight ratio, with the adjustment step size not exceeding 0.5% of the full scale to ensure smooth changes in the damping force.

[0050] This configuration enables the device to dynamically allocate the control weights of force and displacement according to the real-time trend of the displacement error change rate when encountering a frequency change segment of earthquake motion (such as the transition from the high-frequency impact of P waves to the low-frequency and large displacement of S waves). This avoids the lag of the traditional fixed weight ratio during working condition conversion, improves the damper's response ability to complex seismic waves, effectively reduces the inertial force transmission between the boiler body and the steel frame, and ensures the safety and stability of the structure under all working conditions from frequent earthquakes to rare earthquakes.

[0051] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. The damping energy dissipation device with dual control of force and displacement is characterized by: It includes a first energy-consuming component and a second energy-consuming component, both ends of which are connected to the boiler steel frame and the boiler body through hinged supports respectively, and the lengths of the first energy-consuming component and the second energy-consuming component are equal; The first energy dissipation component includes a steel beam, a plurality of bolt holes are distributed in the middle of the steel beam, a limiting groove is provided near both ends of the steel beam, a slender hole-shaped shear failure key is provided on one side of the limiting groove near the plurality of bolt holes, and a connecting cover plate is fixed to the plurality of bolt holes by bolts; The second energy dissipation component is a velocity damper.

2. The force and displacement dual-control damping energy dissipation device according to claim 1, characterized in that: The first energy-absorbing component also includes an extension beam, the ends of the steel beam are connected to the partition, one end of the extension beam is connected to the partition, the other end of the extension beam is connected to the end plate, the end plate is connected to the hinged support, and stiffening ribs are provided between the partition, the end plate and the extension beam.

3. The force and displacement dual-control damping energy dissipation device according to claim 1, characterized in that: The limiting groove is in a rectangular shape, and the side of the limiting groove away from the multiple bolt holes is a straight line, and the side close to the multiple bolt holes is an inwardly concave curve.

4. The force and displacement dual-control damping energy dissipation device according to claim 2, characterized in that: The cross-sections of the steel beam and the extension beam are cross-shaped, I-shaped or box-shaped.

5. The force and displacement dual-control damping energy dissipation device according to claim 1, characterized in that: It also includes force sensors, displacement sensors, controllers and actuators; The force sensor and the displacement sensor respectively monitor the force and relative displacement between the boiler steel frame and the boiler body in real time, and feed the data back to the controller; The controller dynamically adjusts the damping coefficient of the velocity damper based on a preset force-displacement dual-control algorithm.

6. The force and displacement dual-control damping energy dissipation device according to claim 5, characterized in that: The force-displacement dual control algorithm adopts a dual fuzzy logic controller, including a first fuzzy logic sub-controller and a second fuzzy logic sub-controller; The first fuzzy logic sub-controller takes the error value between the force sensor monitoring value and the preset force threshold value and its change rate as input variables and outputs a first damping correction coefficient; The second fuzzy logic sub-controller takes the error value between the displacement sensor monitoring value and the preset displacement limit value and its change rate as input variables, and outputs a second damping correction coefficient; The controller is configured with a weighted fusion module, which dynamically fuses the first damping correction coefficient and the second damping correction coefficient according to a weight ratio of 0.6-0.8:0.2-0.4 to generate a final damping control instruction.

7. The force and displacement dual-control damping energy dissipation device according to claim 6, characterized in that: The actuator includes an electro-magnetic variable damping adjustment unit, which completes the damping coefficient adjustment within 10ms according to the final damping control instruction, and is provided with a self-learning module, which extracts features from historical control data through a neural network algorithm and corrects the membership function parameters of the fuzzy logic controller in real time.

8. The force and displacement dual-control damping energy dissipation device according to claim 7, characterized in that: Extract short-term and long-term features from historical control data. The short-term feature is the frequency domain amplitude spectrum of the force / displacement error within the sliding time window, and the long-term feature is the cumulative statistics of the damping coefficient adjustment frequency and amplitude during continuous 24-hour operation. By using a neural network to fuse and analyze the short-term characteristics and the long-term characteristics, the interval boundary values ​​corresponding to "large force error" and "large displacement error" in the membership function of the fuzzy logic controller are dynamically corrected; The self-learning module is provided with an abnormal data filtering unit, and when it is monitored that the instantaneous acceleration of the boiler body exceeds 80% of the preset safety limit, the feature extraction of the data of the current period is suspended.

9. The force and displacement dual-control damping energy dissipation device according to claim 6, characterized in that: The controller calculates the force error change rate and the displacement error change rate in real time and compares them with the preset impact threshold and displacement threshold; When the force error change rate is greater than or equal to the impact threshold and the displacement error is less than the displacement threshold, it is determined to be a sudden impact state, and a weight ratio of 0.8:0.2 is used; When the force error change rate is less than the impact threshold and the displacement error is greater than or equal to the displacement threshold, it is determined to be a steady-state vibration state, and a weight ratio of 0.6:0.4 is used; The rest of the cases are judged as transition states, and the dynamic weight ratio is calculated by the hyperbolic tangent function according to the ratio of the displacement error change rate to the maximum change rate.

10. The force and displacement dual-control damping energy dissipation device according to claim 9, characterized in that: The dynamic weight ratio calculation configuration in the transition state is: Based on the ratio of the real-time displacement error change rate to the preset maximum change rate, a smooth transition weight ratio curve is generated through the nonlinear mapping characteristics of the hyperbolic tangent function; The controller presets a displacement error change rate threshold interval. When the real-time ratio is within the threshold interval, the dynamic weight ratio changes continuously and gradually from 0.6:0.4 to 0.8:0.2 as the ratio increases, and the weight ratio change rate reaches a peak in the middle of the interval and approaches zero at both ends. The actuator adjusts the damping coefficient according to the gradual weight ratio.

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