42 results about "Maximum displacement" patented technology

The invention discloses a power turbine rotor structure design method, which belongs to the technical field of aero-engines, and comprises the following steps: arranging an oil film damper according to strain energy distribution and vibration mode; performing structure optimization on the power turbine rotor according to the radial deformation condition of the connection interface; designing the sectional wall thickness of the power turbine shaft; a balance boss is arranged on the outer wall of the maximum displacement position in each order of vibration mode power turbine shaft; and the gap between the central pull rod of the power turbine rotor and the power turbine disc is designed according to the maximum vibration displacement of the power turbine disc. According to the invention, the oil film dampers are arranged at reasonable positions, so that the rotor has good vibration reduction; connection interface deformation coordination calculation is carried out, a connection structure is optimized, and the connection interface is not damaged under long-term work; and designing and optimizing the segmented shaft wall thickness, optimizing and designing the critical rotating speed margin, considering the influence of the limit unbalance on the gap, and realizing a good dynamic balance characteristic.

The application provides an oil fume machine vibration testing device and a design method thereof, and relates to the technical field of oil fume machine vibration testing equipment. The design method mainly comprises the following steps: constructing a finite element model of the target oil fume machine vibration testing device; determining whether all the natural frequencies of the finite element model are located outside a preset motor excitation frequency range; if not, modifying the current finite element model to pass the modal checking stage; for the finite element model that passes the modal checking stage, applying a preset virtual load at the motor installation position to perform vibration simulation, and determining whether the maximum displacement is greater than or equal to a predetermined threshold; if not, modifying the current finite element model to pass the stiffness checking stage, and repeating the modal checking stage; iteratively performing the modal checking stage and the stiffness checking stage. Through the embodiments provided in the application, the oil fume machine vibration testing device designed can simulate the vibration of the oil fume machine during operation, and reduce the influence of resonance and forced vibration.

The invention relates to the technical field of structure testing, in particular to an overhead rigid suspension expansion joint fatigue test device and method, and the device comprises a fatigue host module which provides reciprocating vertical vibration power for an expansion joint; the comprehensive platform module is used for providing reciprocating horizontal vibration power for the fatigue host module; the control system module comprises a strain data processing unit which is used for constructing a three-dimensional strain field model and calculating stress distribution based on the strain data; the phase compensation generation unit dynamically generates lag compensation time of the horizontal vibration relative to the vertical vibration; and the driving control unit is used for adjusting the phase of the horizontal vibration in real time based on the lag compensation time, so that the horizontal vibration reaches the maximum displacement value at the vertical vibration peak moment. According to the invention, the authenticity, accuracy and reliability of the fatigue test of the expansion joint can be effectively improved, the phase and displacement synchronization of horizontal vibration and vertical vibration can be dynamically adjusted through a linkage control mechanism, and the spatial multidirectional composite fatigue load in actual operation can be reproduced.

A building structure comprising a plurality of elements extending from a ground surface with at least a first element connected to a second element by a coupling member, the coupling member including a damping element for damping vibrations in the building structure and a means for limiting the deformation of the damping element when the relative movement exceeds a maximum displacement at which damage occurs to the damping element.

The invention provides a technology capable of detecting abnormality of a hydrogen tank even if the hydrogen tank is not damaged. A method for inspecting a hydrogen tank having a cylindrical portion and two dome portions provided at both ends of the cylindrical portion includes: a step of filling the hydrogen tank with a fluid and applying a predetermined pressure; a step for acquiring a determined displacement amount, which is determined to be the maximum maximum value of the maximum displacement amount in the radial direction of the hydrogen tank at the dome portion or the maximum value of the displacement amount changing from increasing to decreasing; and a step for outputting the presence of an abnormality in the hydrogen tank when it is determined that the displacement amount is equal to or greater than the predetermined threshold value.

A rubber-metal shock absorber with pre-adjustment for transferring directional loads and torsional displacement forces, especially for passenger car bogies, comprising a package consisting of at least two and not more than five elastic rubber elements (1) and a separator plate (2) separating the closest surfaces of the elastic rubber elements (1) from each other, and furthermore a first plate (3) and a second plate (4) which adhere to the outer, outer surfaces of the elastic rubber elements (1) respectively, and an upper guide pin (5) and a lower guide pin (7).The elastic rubber element (1) is a disc formed from rubber with fire resistance of at least category R9 for level HL2 and hardness in the range from 42 to 78 Sh°A, wherein for the set composed of elastic rubber elements (1) and the separator plate their design relation of maximum displacements, its design relation with the extended range of individual displacements, where in the design relation of the maximum lateral displacement in relation to the width A of the second plate (4) and the length E of the second plate (4) if these values ​​are equal or only to the width A of the second plate (4) if the length E of the second plate (4) is greater than the width A of the base of the second plate (4) and for displacements in the X direction it has an increase AX of at least 29%, and in the Y direction it has an increase AY of at least 12%.

To provide a torsion response prediction method and a torsion response prediction device capable of easily evaluating torsion response caused by foundation input motion of a building located on irregular ground.SOLUTION: Calculating respective impedance ratios α γ = (γ 1 * Vs1) / (γ 2 * Vs2) of the stratum structures 1 and 2, where Vs1 and Vs2 are respective shear wave velocities of the stratum structures 1 and 2, and γ 1 and γ 2 are respective wet densities of the stratum structures 1 and 2, and calculating an area ratio β = A1 / (A2 + 2A1) from respective basic cross-sectional areas A1 and A2 of the stratum structures 1 and 2; A response analysis of a one dimensional soil column model is performed with respect to each of the layer structures 1 and 2, maximum displacements D1 and D2 of the grounds of the layer structures 1 and 2 are calculated, a difference in ground displacement Δ D = D1 - D2 is obtained, and a rotation angle θ max of the building caused by a base input motion is calculated using the following equation θ max = = p * (Δ D·L) q·α γ / β using preset coefficients p and q with a base length L of the building.SELECTED DRAWING: Figure 2

The invention discloses a post-earthquake damage state identification method, device and system, and a storage medium. The method comprises the following steps: step 1, obtaining a nonlinear effective energy dissipation factor of a pier; 2, replacing the maximum displacement with residual displacement to serve as a deformation damage item, and redefining an energy damage item by introducing a nonlinear effective energy dissipation factor to obtain a post-earthquake damage evaluation model; 3, fitting key parameters of the post-earthquake damage evaluation model; and 4, verifying the post-earthquake damage evaluation model after parameter fitting by adopting quasi-static test data. By adopting the technical scheme of the invention, the damage state of the pier can be quickly, quantitatively and accurately identified.

The application provides a length simulation calculation method for metal hoses for engines based on a finite element method, comprising the following steps: S1, importing a metal hose model into finite element software; S2, establishing a connection relationship between components; S3, calculating the maximum displacement of a servo actuator in the X direction under a follow-up coordinate system according to the maximum swing angle requirement of the engine; S4, setting the displacement-time load of the lower support point of the first servo actuator in the X direction under the first follow-up coordinate system, setting the displacement-time load of the lower support point of the second servo actuator in the X direction under the second follow-up coordinate system, and setting the total analysis step time; S5, performing transient dynamics analysis to simulate the maximum angle circle swing of the engine under the double servo actuators; and S6, observing the swing animation diagram according to the calculation result to analyze whether the length deformation of the metal hose is coordinated.

The invention discloses a method for predicting the maximum displacement of a dredging ship gauge pile. The method comprises the following steps: constructing a trolley-gauge pile-soil body coupling numerical model based on ABAQUS software; establishing a cubic polynomial regression model of the maximum displacement of the gauge pile with respect to the three influence factors by applying a response surface method; data samples are stochastic in a regression model parameter range, and a training set, a verification set and a prediction set are divided; constructing a BP neural network model, and training and testing the BP neural network model by using the training set and the verification set to obtain an optimized prediction model; and inputting influence factors of the prediction set into the trained BP neural network for prediction, performing dual verification on a prediction result by using a relative error and a determination coefficient, and outputting the prediction result when the prediction result meets a verification standard. According to the method, high-precision real-time prediction of the displacement of the gauge pile is realized, and an important decision basis is provided for safe construction of a dredging ship.

The invention discloses a well cementation injection displacement determination method and device. The method comprises the steps that the structural size of a shaft, well cementation fluid performance and well cementation fluid injection information are obtained; according to the structural size of the shaft, the performance of the well cementation fluid and the injection information of the well cementation fluid, the position distribution of the well cementation fluid in the shaft is determined; according to the position distribution of the well cementation fluids in the shaft, hydrostatic column pressure of each position is calculated, and according to the hydrostatic column pressure of each position, a friction resistance pressure drop window of each stratum of the shaft is determined; according to the friction resistance pressure drop window of each stratum of the shaft, a displacement window of each stratum is obtained through bisection iteration solution; the displacement window comprises a maximum displacement curve and a minimum displacement curve; and according to the displacement window, in combination with the well cementation fluid injection information, the well cementation injection displacement is determined, and therefore the problem that in the prior art, the well cementation injection displacement cannot be determined is solved.

A kind of whole ship finite element batch calculation and post-processing method, comprising the following steps: S1: according to FPSO working sea area environmental condition and the large number of combined working conditions of assembly load, establish FPSO ship wet surface model;S2: the FPSO ship wet surface model is passed through wave load to ship surface batch generation load file;S3: according to ship data and the latest thickness data of ship, establish FPSO whole ship finite element model, S4: the whole ship finite element model is grouped and named according to ship structure and ship steel material properties;S5: obtain the whole ship stress value and maximum displacement batch file under each group working condition;S6: using ANSYS post1 post-processing module exports the stress value and maximum displacement batch txt file of whole ship area of interest;S7: the stress value and maximum displacement batch data of whole ship area of interest are analyzed and output result, the present application provides strong support for the safety and reliability of FPSO and the establishment of proxy model.

The application discloses a large-angle spherical hinge support for a column double eccentric compression test, which comprises a bottom plate, a spherical hinge assembly is arranged on the bottom plate, the upper end of the spherical hinge assembly is connected with a spherical hinge plate, an upper sliding rail group is arranged at the spherical hinge plate, a lower sliding rail group is arranged at the bottom plate, a connecting rod assembly is arranged between the upper sliding rail group and the lower sliding rail group, and the connecting rod assembly ensures large-angle rotation of the spherical hinge assembly. The large-angle rotation is realized by adjusting the matching relationship between the hemispherical body in the spherical hinge plate and the groove body in the bottom basin, and the upper sliding rail group and the lower sliding rail group provide a sliding and rotating adjustment support base for the connecting rod assembly. The large-angle bidirectional rotation can be realized by the sliding steel bars and the connecting rod assembly, the spherical hinge plate and the bottom basin are in surface-to-surface contact, the contact stress area is larger than that of the traditional line contact, the peak stress on the contact surface is reduced, meanwhile, the connecting rod assembly on the outer side can limit the maximum displacement of the bidirectional hinge of the support, and the test piece is prevented from being separated from the support.

The invention discloses a control system and a control method for screwing and unscrewing drill rod threads of a power head type drilling machine, and particularly relates to the technical field of geological drilling equipment.When a buckle is not screwed and unscrewed, a pilot control reversing valve and a first three-position four-way reversing valve control a power head motor to rotate forwards and backwards, and a second three-position four-way reversing valve controls a feeding oil cylinder to move; the second power head motor controls the pressure reducing valve to autonomously adjust the motor displacement; when the shackle is screwed, the fourth three-position four-way reversing valve controls the oil cylinder of the clamp holder to clamp the drill rod; the first power head motor controls the pressure reducing valve to adjust the motor to the maximum displacement, the pilot control reversing valve and the first three-position four-way valve control the motor to rotate forwards and backwards, the pilot control reversing valve controls the first two-position two-way valve or the second two-position two-way valve to change positions, and the first power head motor controls the pressure reducing valve to control the third three-position four-way valve to change positions. The third three-position four-way valve controls the feeding oil cylinder to move, the axial movement of the power head is controlled through inching, the drill rod is matched with thread screwing-in or screwing-out, displacement is compensated, the self weight is balanced, and the drill rod screwing and unscrewing efficiency is improved.

The application discloses a vertical cyclic loading test system applied to a geotechnical centrifuge and a control method, which comprises a model box, a counterforce mechanism, a vertical loading mechanism and an electrical control mechanism, the counterforce mechanism is fixed on the top of the model box, the vertical loading mechanism is vertically installed on the counterforce mechanism, and the vertical and horizontal position of the vertical loading mechanism on the counterforce mechanism is adjustable, the application can stably work under a high centrifugal acceleration of 160g, the maximum loading force reaches 400kN, the control precision is 0.2kN, the maximum displacement stroke is 160mm, the displacement precision is 0.1mm, the cyclic loading frequency is 1Hz, and the cyclic amplitude is ±30mm, so that the simulation requirement of most high bearing capacity working conditions of marine engineering, pile foundation engineering and the like can be met.

The invention discloses a nonlinear coupling control method and device for piezoelectric dispensing and a medium, and relates to the technical field of precise dispensing and motion control. The method comprises the following steps: acquiring structural parameters of the dispensing system, and establishing a nonlinear kinetic model of the dispensing system; performing parameter scanning and sensitivity index calculation on the structure parameters through a nonlinear kinetic model to obtain key parameters of which the response to the dispensing system is greater than a preset threshold value; constructing a multi-objective optimization function taking the maximum displacement, the maximum speed and the vibration amplitude of the firing pin as performance objectives; building a joint simulation platform, and importing the key parameters into the joint simulation platform to obtain real-time response energy of the firing pin; adjusting a weight coefficient of the multi-objective optimization function; and performing iterative simulation and iterative adjustment through an optimization algorithm to obtain an optimal parameter combination of the key parameters. According to the method, the platform is optimized by fusing nonlinear dynamic modeling and joint simulation, and the movement performance of the firing pin and the overall stability of the dispensing system are improved.

The invention relates to a method for operating a tamping machine (1), which travels along a track (2) and comprises a tamping unit (9) which can be adjusted relative to a machine frame (23) and which has tamping tines (10) that can be displaced relative to one another, wherein position data of track sleepers (3) are captured before a tamping operation. Prior to each tamping operation, a permissible maximum displacement path (smax) is specified for each tamping tine (10) by means of a computing unit (44) depending on a current position of the tamping unit (9) relative to the track sleeper (3) to be currently tamped. This specification of a permissible maximum displacement path (smax) for each tamping tine (10) ensures that the displacement operation achieves the greatest possible effectiveness, and damage to the sleeper and / or the respective tamping tine (10) and to the ballast is reliably avoided.

The invention provides a dynamic blade tip clearance control method for an axial flow fan. The dynamic blade tip clearance control method comprises the following steps that S1, a multi-physical field coupling analysis model of an impeller-frame system is constructed; s2, on the basis of the multi-physics field coupling analysis model, simulating calculation is conducted on the maximum radial displacement delta Rrootor of the impeller and the minimum radial displacement delta Rhousing of the inner circle of the frame, and the dynamic envelope range of the outer edge of the impeller and the dynamic envelope range of the inner edge of the frame under the design working condition are obtained; s3, calculating a minimum safety gap required between the impeller and the frame; and S4, according to the minimum safety clearance delta min obtained through calculation, fan mechanical design is guided, and it is ensured that the actual assembly blade tip clearance is larger than or equal to delta min. According to the method, the minimum safety clearance is accurately calculated, fan design and manufacturing are guided, and minimization and optimization of the blade tip clearance are achieved on the premise that operation interference is avoided.

The present application relates to the technical field of earthquake engineering, and provides a method for determining the seismic response of an engineering site under the action of a seismogenic fault, comprising the following steps: S1, determining the bedrock surface of the engineering site; S2, establishing the scale range of the engineering site; S3, selecting near-fault ground motion records and site categories for inputting seismic waves; S4, outputting the site response under the input of ground motion; and S5, outputting the site response under the input of dislocation. 地表 The dislocation input of the finite element software site earthquake is used to obtain the surface displacement deformation characteristics and select the maximum displacement value D 位移 The present application provides a method for selecting near-fault ground motion records considering dislocation in a consistent manner for the site classification of the input mode of the calculation and analysis of the seismogenic fault engineering site, respectively strips the seismic input of the acceleration time history and the bedrock dislocation amount input, and is closer to the actual earthquake disaster, so as to provide reasonable design parameters for the seismic design of the engineering structure and the design of the anti-fracture capacity.

The invention discloses a fracturing method for reducing fracture disturbance fault influence, which comprises the following steps of: determining the maximum displacement and the maximum injection liquid amount of first-section fracturing construction according to fault type, fault extension condition, distance between fault and fracturing section and micro-fracture development degree, performing first-section fracturing construction by taking supercritical carbon dioxide as preposed liquid, and performing second-section fracturing construction by taking supercritical carbon dioxide as preposed liquid; determining the minimum time interval of the adjacent construction sections according to the distance between the fault and the fracturing sections, the spatial distribution of the microseism events monitored in the fracturing construction of the first section and the development degree of the microfractures between the two fracturing sections and the fault; re-checking the micro-fracture development degree between the fracturing section and the fault, and determining the maximum displacement and the maximum liquid injection amount of the fracturing construction of the second section; and second-section fracturing construction is conducted based on the minimum time interval, and the steps are repeated till fracturing construction of all sections is completed. The method can be directly applied to an oil and gas development site, the disturbance influence of fracturing on a fault is greatly reduced, and the purpose of safe fracturing is achieved.

The invention relates to the technical field of oil and gas field development yield increase operation fracturing construction, and discloses a multi-pump displacement compensation control method based on precomputation, which comprises the following steps of: configuring the load grade, the rated displacement and the maximum displacement of each pump skid; calculating an online standby margin; when a pump skid breaks down, displacement compensation is calculated; and calculating to obtain the calculated displacement of all the on-line pump skid, and executing compensation. The invention further discloses a multi-pump displacement compensation control system based on pre-calculation. According to the multi-pump displacement compensation control method and system based on pre-calculation, the problem of displacement fluctuation caused by pump skid shutdown in fracturing construction is solved, and the construction stability, the equipment utilization rate and the automation level are improved.

The invention relates to the technical field of steel structure installation, in particular to an accurate butt joint positioning method based on large-span bidirectional fish-bellied steel truss installation, which comprises the following steps: acquiring a plurality of measuring points on each truss, and obtaining structural form data of each measuring point according to the elevation and plane position of each measuring point; in any installation execution step, constructing an overall displacement vector of the truss structure according to the truss structure corresponding to each measuring point, and extracting relative displacement corresponding to each measuring point based on the variation trend of the overall displacement vector; according to the attitude of the truss structure where the measuring points are located, the distance change rate of the adjacent measuring points is calculated according to the relative displacement, and the deformation type corresponding to each measuring point is defined; combining the overall displacement and the relative displacement under different deformation types into displacement, circularly judging the displacement under each installation step, and determining a key node corresponding to each installation step; and feeding back the mounting precision of each measuring point according to the maximum displacement of the key node. And the positioning precision and efficiency during installation of the truss are improved.

The invention discloses a method for calibrating the flow pressure difference value of an exploration drilling machine, and relates to the technical field of exploration drilling machines. The calibration method comprises the steps that liquid flow is output through a load-sensitive pump, and the flow direction of the liquid flow is controlled through a load-sensitive valve; then the power head motor is controlled to rotate forwards and backwards, and after the rotating speed of the drill rod driven by the power head motor to rotate is detected through a rotating speed sensor, a detected output rotating speed signal is processed through an electrical program, and the rotating speed of the drill rod is displayed on a display screen; when the power head motor works, an adjusting screw on the flow differential pressure adjusting valve is adjusted, so that the calculated maximum rotating speed when the load-sensitive pump reaches the maximum displacement is displayed on the display screen, the maximum rotating speed is just the flow differential pressure value required to be set by the exploration drilling machine, the adjusting screw on the flow differential pressure adjusting valve is locked, and calibration is completed. The calibration of the flow pressure difference value can be completed without disassembling and assembling a pipeline and adding extra equipment, and the method is high in efficiency, low in cost, simple and reliable.

The present application relates to a dam simulation test cabin load calculation method based on constant load and live load analysis, comprising: determining the weight distribution of the test cabin; obtaining the structural parameters of the test cabin; building a finite element model of the test cabin; analyzing and calculating the constant load and live load of the test cabin, and performing load combination analysis; according to the load combination analysis result, the maximum displacement of the dam simulation test cabin under different combined loads is calculated; the stress field and strain distribution of the dam simulation test cabin are calculated by using the finite element model; the structure and parameters of the test cabin are adjusted to determine whether the dam simulation test cabin meets the safety design requirements. The present application analyzes the load effect of the dam simulation test cabin under various load combination conditions, analyzes the stress field and strain distribution of the test cabin under combined loads, calculates the maximum deformation displacement of the test cabin under different combined loads, and provides a scientific basis for the safety design of the dam simulation test cabin.

The invention relates to a cosine beam quasi-zero stiffness vibration isolator parameter determination method and device and computer equipment. The method comprises the steps that a finite element model of a vibration isolator is constructed according to preset structure parameters; generating a rigidity curve according to the relation between the counter-acting force and the displacement in the zero rigidity area of the vibration isolator in the finite element model; the value interval of the structural parameters of the vibration isolator is adjusted until the residual error of a first sudden change point with the minimum displacement in the rigidity curve is smaller than or equal to a preset residual error value, and the displacement difference between the first sudden change point and a second sudden change point with the maximum displacement is equal to the displacement target area of the isolated object; wherein the residual error is used for indicating the error between the counter-acting force and the preset acting force applied to the vibration isolator by the isolated object when the displacement is the same; and obtaining a target structure parameter when the residual error is minimum in the adjusted value interval. By adopting the method, the problem that high calculation precision and low calculation cost cannot be considered at the same time during parameter selection of the quasi-zero stiffness vibration isolator of the cosine beam can be solved.

The present application relates to the technical field of fan blade design, and discloses a hollow fan blade and a design method and system thereof, wherein the aerodynamic load, temperature load and vibration load data of the inlet edge and the exhaust edge of the fan stator adjustable blade under a to-be-analyzed working condition are used as working condition load to perform topology optimization of the optimization area of the fan stator adjustable blade; the artificial pseudo density of the optimization area is adjusted in the optimization process to obtain the topology optimization configuration of the optimization area, and finally the topology optimization configuration of the fan stator adjustable blade that meets the maximum first-order natural frequency and the minimum compliance under the to-be-analyzed working condition is selected from the topology optimization configuration of the optimization area as the topology structure of the design area of the fan stator adjustable blade, and auxiliary support is added to the topology structure to form the skeleton structure of the optimization area of the hollow fan stator adjustable blade. The weight of the blade can be significantly reduced on the basis of ensuring the strength and stiffness, and the maximum displacement of the blade tip and the vibration fundamental frequency can meet the design requirements.

The application provides a sliding large deformation anchor rod, which comprises an anchor rod body and a sliding assembly. Two ends of the anchor rod body are a free end and an anchoring end which extends into an anchor hole respectively. The sliding assembly comprises a sleeve which is sleeved outside the free end. The outer wall of the sleeve is connected and fixed with surrounding rock. The sliding assembly further comprises a sliding mechanism and a limiting mechanism which are matched with each other and are arranged in the sleeve. The sliding mechanism is installed outside the free end and can move along the sleeve while the anchor rod body moves. The limiting mechanism is installed on the inner wall of the sleeve. The anchor rod body moves axially along the sleeve under stress and drives the sliding mechanism to move. The sliding mechanism is limited and matched with the limiting mechanism through shape change. The active mechanism can well adjust the displacement of the anchor rod body, and the maximum displacement is controllable. The application has simple structure and is convenient to use. The safety and stability of underground projects of rock and soil can be ensured, a larger supporting force can be provided, and the large deformation displacement demand can be met.

This invention relates to a method for evaluating the fatigue behavior of welded joints, specifically for welded joints of high-strength steel structural components operating under dynamic loads. The method includes the following steps: butt welding two identical substrates to obtain a butt joint with a butt weld seam; placing a vertical plate on the front side of the butt weld seam and performing a fillet weld to obtain a fillet weld seam, resulting in a specimen with both a fillet joint and a butt joint. The welding direction of the fillet weld seam is perpendicular to the welding direction of the butt weld seam, and the center of the fillet weld seam intersects with the center of the butt weld seam; subjecting the specimen to a three-point bending load fatigue test, placing the side of the specimen with the fillet weld seam and the butt weld seam on the tension surface. When the indenter meets the maximum displacement threshold, the specimen is considered to have failed, and the corresponding number of load cycles is taken as the fatigue life of the specimen. This invention can simulate the interaction and fatigue failure behavior of butt weld seams and fillet weld seams under actual dynamic loads, providing indirect fatigue behavior evaluation for large high-strength steel structural components.

The invention relates to a lightweight optimization system and method for a rocker arm structure derrick, and the system comprises a processor which comprises a construction module, an analysis module, a calculation module and an optimization module. The construction module is used for constructing a finite element model based on the structural features of the rocker arm structure derrick; the analysis module is used for performing finite element static analysis based on the finite element model, calculating the maximum displacement and the maximum stress of the rocker arm structure derrick under different working conditions, and selecting a dangerous working condition based on the maximum displacement and the maximum stress; the calculation module is used for optimizing the finite element model into an optimization model based on a balance optimizer algorithm and a penalty function method, performing size optimization on the material cross section of each section of the rocker arm structure holding pole, and achieving the optimization target of structure mass minimization; and the optimization module is used for monitoring the change curve of the total mass of the dangerous working condition in the iteration process based on the optimization model to obtain the optimal parameters of the optimization model. The size of the rocker arm structure holding pole is optimized, and the total mass is obviously reduced.