38 results about "Arc length" patented technology

This invention discloses a method for analyzing the meridional strain of air springs based on piecewise integration of elliptical arc length, belonging to the technical field of vehicle suspension systems or rubber elastic elements design. The method includes the following steps: approximating the arc segment from the top of the air spring generatrix to the outermost bulge point as the first quadrant of an ellipse, determining the major and minor semi-axes of the reference and inflation states; introducing normalized coordinates to establish a linear mapping of the abscissas of the two states, constructing an elliptical arc length infinitesimal element and transforming it to the same interval for integration; dividing the interval into even-numbered equal parts, using the complex Simpson method to obtain the arc length piecewise, calculating the ratio of the inflation arc length to the reference arc length as the elongation ratio, and taking the natural logarithm to obtain the true meridional strain of each segment of the generatrix; this invention can accurately describe the non-uniform deformation of each segment of the generatrix during air spring inflation, providing a basis for strain prediction and fatigue assessment.

The application relates to the technical field of motion planning, and discloses a corner fairing method of an asymmetric Airthoid-arc, which comprises the following steps: constructing a tool path fairing curve which is sequentially connected by a first Airthoid curve, an arc and a second Airthoid curve, and is used for fairing a corner formed by adjacent straight line segments; preliminarily setting a first transition length and a second transition length according to the lengths of the line segments on the two sides of the corner; solving the first and second tangent angles according to geometric constraints, tangential continuity, curvature continuity constraints and position continuity constraints; if there is a solution, analytically calculating a current approximate error; and finally analytically calculating the curvature extreme value and the arc length of the fairing curve. The asymmetric curve structure is adopted, the corner space is fully excavated, the curvature extreme value is small, the arc length can be analytically expressed, and the profile error is controllable, so that the numerical control machining efficiency is improved.

This utility model relates to the field of vehicle gas supply technology and discloses a gas cylinder mounting bracket, including a first main body and a second main body fixedly connected. The front of the first main body has an arc-shaped portion along its length, and a straight portion extends smoothly from the end of the arc-shaped portion. The shape of the arc-shaped portion is adapted to the gas cylinder, and the arc length of the arc-shaped portion satisfies the following condition: the plane where the end of the arc-shaped portion and the straight portion are located is above the plane where the lowest point of the arc-shaped portion is located and below the plane where the beginning of the arc-shaped portion is located. A first groove is provided on the back of the first main body along its length to fit the second main body into the first main body, and both ends of the second main body extend beyond the corresponding ends of the first main body. A protrusion is provided at the end of the second main body, protruding towards the front of the second main body and inclined at the top. Reinforcing members are provided at both ends of the second main body. Mounting holes are provided at least at the beginning of the second main body and the protrusion. Mounting members are provided on both sides of the first main body. This bracket meets the ground clearance requirements of existing vehicles, changes and simplifies the assembly process, optimizes overall strength, and provides high gas cylinder protection performance.

This invention discloses a method for simulating the post-buckling strength of perforated casing considering machining accuracy. The method establishes a geometric model of the casing based on the machining accuracy characterized by ellipticity and eccentricity. The post-buckling behavior of the casing is obtained using the arc-length method, and the external extrusion strength of the complete casing under this machining accuracy is calculated. The results are compared with those from external extrusion strength experiments. If the error condition is met, a geometric model of the perforated casing is established based on this accuracy, and the external extrusion strength of the perforated casing is calculated using the arc-length method. This invention combines casing machining accuracy with the perforated casing stability failure method to calculate the external extrusion strength, improving the accuracy of the numerical simulation results of the perforated casing's external extrusion strength and providing a new method for simulating the external extrusion strength of perforated casing.

The application relates to the technical field of three-dimensional model, and discloses a three-dimensional model curved surface unfolding method and device, electronic equipment and a storage medium; the method comprises the following steps: determining n intersection points of the circular hole and the circular-arc wall curved surface, wherein n is an integer greater than 1; determining the arc length of each intersection point to the same elevation of a first reference line of the circular-arc wall curved surface based on the n intersection points; displaying the n intersection points on a two-dimensional plane by taking the arc length of each intersection point as an x value and taking the distance of each intersection point from a second reference line of the circular-arc wall curved surface as a y value; and generating an edge line of the intersection of the circular hole and the circular-arc wall curved surface based on the n intersection points. The application realizes the conversion of the three-dimensional graphic data information of the circular-arc wall and the hole on the wall into a two-dimensional drawing form.

The application relates to an intelligent anti-skid decision method and device for track locomotive control, which comprises the following steps: collecting wheel displacement distance, track horizontal offset angle, track vertical offset angle and wheel rotation angular velocity; calculating the ideal displacement length of the wheel in the non-idling state according to the wheel displacement distance, the track horizontal offset angle, the track vertical offset angle and the wheel rotation angular velocity; calculating the wheel rotation arc length and the offset percentage of the wheel linear speed compared with the average value according to the wheel rotation angular velocity; judging the fitting degree of the wheel to the track according to the wheel displacement distance, the ideal displacement length of the wheel in the non-idling state, the wheel rotation arc length, the offset percentage of the wheel linear speed compared with the average value and the track on which the wheel travels; and adjusting the sanding opening of the sanding part according to the fitting degree of the wheel to the track. The application can realize automatic sanding according to the current locomotive state, and accidents caused by the idling of the locomotive wheel can be avoided.

This invention relates to the field of construction inspection technology and discloses a machine vision-based method for inspecting the construction quality of steel mesh. The method includes: acquiring color images and depth maps of the steel mesh; locating adjacent intersection nodes and the mid-span sag points of the connecting lines; extracting depth values ​​and converting them into three-dimensional physical coordinates; setting the intersection nodes as the local coordinate origin; calculating the difference between the horizontal projected straight-line distance and the relative sag depth; using algebraic analytical methods to simultaneously solve for the coefficients of the local parabolic deflection shape; using the arc length integral analytical method based on these coefficients to obtain the true physical arc length of the steel reinforcement; and finally calculating the relative error ratio between the actual arc length and the standard spacing to output the judgment result. This invention effectively eliminates the projection shortening error caused by local steel reinforcement sag, the calculation process requires no iterative optimization, the data logic is strictly self-consistent and closed-loop, and high-precision true spacing detection is achieved.

This invention discloses a method for analyzing the bending degree of tubing used in leisure tables and chairs, comprising: acquiring the original curvature signal of the bending segment from a continuous curvature scanning probe on a tubing bending testing platform, and simultaneously acquiring wall thickness distribution data of the bending segment from an ultrasonic thickness gauge probe at the arc apex; identifying the boundary between the positioning bending segment and the straight segment where the bending transition characteristic changes stably from non-zero to zero in the measured bending morphology, and extracting the steepness of the bending-straight boundary in the boundary between the positioning bending segment and the straight segment; locating the arc apex position of the bending segment in the measured bending morphology, extracting the target wall thickness at the arc apex position from the wall thickness distribution data, and using this as the target residual wall thickness at the arc apex; obtaining the overall arc length constraint set by the tubing bending process, calculating the total arc length of the actual bending segment using the measured bending morphology, and determining the difference between the overall arc length constraint and the total arc length as the arc length surplus.

This invention discloses a safety helmet for substation operation and maintenance inspections, comprising a helmet body with a brim surrounding the perimeter. A locking block protrudes from the center of the top of the helmet body. The helmet also includes a camera positioning mechanism, comprising a bracket, a camera positioning component, and a protective cover. The bracket includes a collar and an arc-shaped frame. The two ends of the arc-length direction of the arc-shaped frame are connected to the opposite sides of the collar. The collar abuts against the brim. The center of the arc-length of the arc-shaped frame is coaxial with the center of the helmet body. A mounting groove for inserting the locking block is formed at the center of the arc-shaped frame. The camera positioning component is mounted on the arc-shaped frame. The protective cover is made of cushioning material and covers the bracket. The protective cover is detachably connected to the bracket and has a clearance groove, within which the camera positioning component is located. This invention provides a substation operation and maintenance inspection safety helmet with good inspection performance and low cost.

This disclosure provides a method and apparatus for determining the anchor plate structure of an anchor bolt mechanism, as well as an anchor plate and an anchor bolt mechanism. The anchor bolt mechanism includes a flange, an upper anchor plate, grout, a substrate, and an anchor bolt. At least a portion of the grout is disposed between the upper anchor plate and the substrate. The anchor bolt passes through the flange, the upper anchor plate, the grout, and the substrate, and fixes the flange to the upper anchor plate. The method for determining the anchor plate structure includes: establishing a mechanical model that considers the portion of the upper anchor plate extending beyond the flange as an outer beam; calculating a first stress between the upper anchor plate and the grout and a first arc length of the upper anchor plate; calculating the load on the portion corresponding to the outer beam under the mechanical model based on the first stress and the first arc length; calculating the bending moment data of the portion corresponding to the outer beam based on the load and the length of the outer beam; and calculating a first thickness of the upper anchor plate based on the bending moment data and the strength data of the upper anchor plate. The anchor plate structure determination method of this disclosure can accurately provide the specific structural parameters of the anchor plate, providing a theoretical basis for anchor plate structure design.

This invention belongs to the field of industrial automation control technology, specifically relating to an intelligent optimization system for process parameters in automotive steel wire production. The system includes: a data acquisition module, a deviation calculation module, a prediction module, and a control module. The data acquisition module constructs a Lagrange coordinate system with material particles as the core, collects time-series process data throughout the entire process, and maps it to the material particles. The deviation calculation module calculates the historical deviation modulus of the material particles based on the arc-length integral of the state deviation trajectory. The prediction module constructs a dissipative damping model based on the historical deviation modulus and calculates the performance loss of the material particles. The control module generates process parameter compensation quantities through inverse projection based on a preset historical regression gradient vector and performance loss, and implements feedforward control of the equipment. This invention achieves closed-loop compensation for historical accumulated damage, improving the consistency of automotive steel wire product performance.

The application discloses an arc length control method, system, device and medium for electric arc additive manufacturing, and relates to the field of additive manufacturing; the control method comprises the following steps: acquiring image data of a target part; determining arc length data by using an image edge data detection method according to the image data; obtaining a fuzzy error by using fuzzy mapping according to the arc length data and set reference arc length data; determining a control quantity according to the fuzzy error; the control quantity comprises a pulse load ratio; and the deviation of the arc length data of the target part in the manufacturing process is compensated according to the control quantity, and the target part is manufactured by using a non-gas shielded welding method; and the application can realize automatic control of the arc length.

This invention relates to the field of turbomachinery technology, and provides a geometric construction method and system for a two-dimensional blade profile in tandem, comprising: using the pressure surface profile of the front row of blades as a reference, at the starting point... P End point of front pressure surface T PS An arc length coordinate system is established between the points, and a channel width function is defined. The channel generation segment profile of the rear blade suction surface is generated by offsetting along the outer side of the normal at each point. A free-form segment profile is then constructed that smoothly connects to the channel generation segment, resulting in the complete rear blade suction surface. Subsequently, the rear pressure surface profile is generated by offsetting along the inner side of the suction surface normal according to a preset thickness distribution function, and smooth leading and trailing edge connection curves are constructed respectively, completing the two-dimensional airfoil structure of the rear blade. This invention combines the slit channel width distribution with the rear blade suction surface generation process, ensuring the geometric continuity of the channel segment while improving the freedom, parameterization, and geometric adjustability of the airfoil design, facilitating aerodynamic design, optimization design, and engineering applications.

This utility model belongs to the technical field of rotor spinning machines, specifically relating to a spinning head positioning mechanism for a rotor spinning machine, including limiting ribs and positioning components. The limiting ribs consist of two pieces, arranged parallel to each other at the bottom of the lower cover of the spinning head. When the lower cover rotates along the spinning head positioning axis, the contact surfaces on the limiting ribs abut against the machine beam. The positioning component includes a positioning block, which is arc-shaped. The arc of the positioning block is equal to the arc of the outer circumference of the spinning head positioning axis, and the arc length of the positioning block is one-third of the arc length of the outer circumference of the spinning head positioning axis. This utility model provides a spinning head positioning mechanism for a rotor spinning machine. By separately setting the limiting ribs and positioning components, it limits the contact and limiting support after the lower cover of the spinning head is opened, and limits the displacement of the lower cover along the axial direction of the spinning head positioning axis, thereby achieving precise positioning while saving costs.

This invention relates to the field of automotive engineering technology and provides a method for predicting the dynamic dimensions of leaf springs, comprising the following steps: S1, inputting the determined arc length S and arc height H of the leaf spring into a leaf spring parameter calculation model, and outputting leaf spring parameters, including the radius R, central angle α, and chord length L of the leaf spring; S2, applying the corrected leaf spring parameters to the overall vehicle hardpoint design and general layout drawing through two iterative approximations. When setting the arc length and arc height of the leaf spring, the central angle, radius, and chord length of the main leaf spring plate with engineering precision can be analyzed, satisfying the various dimensions required for drawing the characteristic graphics of the main leaf spring plate with engineering precision, and meeting the boundary requirements of the hardpoints of the leaf spring in the overall vehicle design for the general layout design.

The application discloses a kind of measurement method and measuring device of tire capsule center line skew amount, including placing tire to be measured, make its axis with first direction parallel;Along the first direction, the initial position of the indicating mark along the first direction is set as reference zero point, by moving preset indicating mark, make it with the one side edge of the capsule center line in the tire inner align, and again;Under the condition that the relative position of tire and indicating mark in the plane perpendicular to first direction is unchanged, tire is turned over;Again, the indicating mark is moved along the first direction, make it with the same side edge of the capsule center line in the tire inner after turning over align;The displacement value of indicating mark relative to reference zero point in the first direction is obtained at this time, take the absolute value of the value as the capsule center line skew amount of tire at current measurement position, half.This application converts arc length measurement into height difference measurement, easy to operate, without positioning tire center, direct reading, greatly improve measurement efficiency and accuracy.

This invention relates to a method for arc length calibration and dynamic fault location of transmission lines based on real-time feedback of suspension angle. The method includes: setting up multiple distributed monitoring nodes along the transmission line within each span; calculating the actual arc length of the conductor within each span; obtaining the equivalent path length of traveling wave propagation between adjacent distributed monitoring nodes; calculating the fault location using a two-end traveling wave location formula; outputting the tower segment number where the fault occurs and the distance to the nearest tower, and reporting this to the monitoring center. This invention significantly improves positioning accuracy, eliminates path errors caused by sag, achieves closed-loop adaptive system operation, and can cope with sudden weather changes and line condition changes during heavy load operation without manual intervention; assists maintenance personnel in determining the patrol range and improves on-site handling efficiency; and utilizes a dual-range Rogowski coil current sensor design to simultaneously handle both low-resistance short-circuit large signals and high-resistance grounding weak signals, expanding the system's fault detection applicability.

The utility model discloses a kind of precipitation well closure devices, comprising: the positioning support cylinder body embedded in the wellhead of precipitation well and the closure cover plate located at the top of positioning support cylinder body;The discontinuous clamping block formed by the outside convex of the contact of positioning support cylinder body and closure cover plate and the discontinuous clamping groove formed by inward recessing;Gap is set between adjacent two clamping blocks or clamping grooves, and the arc length of gap is greater than the arc length of unit clamping block or clamping groove, the shape of clamping block and clamping groove is complementary, and the detachable connection of positioning support cylinder body and the closure cover plate is realized by rotating.This application provides a kind of precipitation well closure device with fast closure and high airtightness.Rapid installation is realized by the rotating locking design of convex and clamping groove;Effectively solve the defects of many construction procedures, complex process and long time of existing precipitation well closure, significantly improve waterproof reliability in combination with water stop ring and double sealing structure (mechanical seal+grouting seal).

The present application relates to the technical field of saw blade cutting, in particular to a disc saw blade driving control method and system of a disc saw machine. The method determines a real-time contact arc length according to a real-time feeding position, a saw blade and a workpiece cross-section geometric parameter; determines a reference feeding speed according to the contact arc length; maps a real-time current signal from a time domain to an angle domain and divides the angle domain to obtain an angle domain unit; accumulatively calculates the current signal in each angle domain unit to generate an angle domain current integral value sequence; differentiates the angle domain current integral value sequence to determine a difference sequence; determines a mutation component sequence according to each element in the difference sequence and a preset noise reference value; determines a congestion degree index based on the mutation component sequence and the angle domain current integral value sequence; determines a speed adjustment coefficient according to the congestion degree index and in combination with a preset minimum speed coefficient; multiplies the reference feeding speed and the speed adjustment coefficient to generate a target feeding speed to control the feeding shaft movement of the disc saw machine, thereby maximizing the cutting efficiency.

The application provides a robot teaching method and system based on visual pose capture, equipment and medium, and belongs to the technical field of robot teaching and trajectory control. The method comprises the following steps: based on an original teaching trajectory, a constant arc length sampling method is used to calculate a cumulative arc length of the trajectory and linear interpolation is performed between adjacent sampling points to obtain a plurality of key points; a mechanical arm moves to a target pose corresponding to the key points in sequence, and a current pose of a teaching tool is captured in real time at each key point; position errors and attitude errors are calculated based on the current pose and a recording pose of the original teaching trajectory, and a correction amount is generated to iteratively update the pose of the mechanical arm until a preset error threshold is met to obtain a corrected key point corresponding relationship; a local affine compensation model is established according to the corrected key point corresponding relationship, and a compensation trajectory is generated; and the end of the mechanical arm completes trajectory reproduction based on the compensation trajectory. The application improves the trajectory reproduction accuracy and reduces the time cost of closed-loop correction.

The application relates to the technical field of high-voltage power transmission and distribution, and provides a Mayr arc model construction method and system based on a dynamic arc radius and a random length, which comprises the following steps: generating a multi-dimensional random state vector representing micro-instability in the arc; calculating a random effective arc length and a dynamic arc radius according to the multi-dimensional random state vector, an instantaneous arc current and a mechanical contact spacing; calculating a dynamic time constant, a heat dissipation power and an arc voltage correction amount based on the random effective arc length and the dynamic arc radius, and solving an improved Mayr differential equation to update an arc conductance; feeding back and modulating evolution parameters of the multi-dimensional random state vector according to a power imbalance degree calculated by the arc conductance, and adjusting secondary empirical coefficients in the dynamic arc radius and the dynamic time constant; and generating the Mayr arc model after complete time domain iteration. The method generates a high-fidelity Mayr model which can reflect arc physical randomness and is suitable for probabilistic evaluation.

The utility model relates to a straightening machine protection seat with transverse arc grooves, the arc groove surface is provided with arc mounting groove, detachable arc lining plate is arranged in the arc mounting groove, the arc surface of arc lining plate protrudes from the groove surface of arc groove, and the pipe support is on the arc surface of arc lining plate. The arc length of arc lining plate is less than the arc length of arc groove, and the central angle is not more than 120 DEG. The groove width of arc mounting groove is 1 / 3~1 / 2 of the groove length of arc groove. The straightening machine protection seat structure of the application can be transformed by using the original worn straightening machine protection seat, saving the cost. The worn part is removed by turning the original worn arc groove, then the arc mounting groove is arranged on the arc groove surface, the arc lining plate is embedded, the arc lining plate is used for directly supporting the pipe, the contact loss of pipe mainly occurs on the arc lining plate, and the arc lining plate only needs to be maintained and updated daily.

This invention relates to the field of tunnel and underground engineering design technology, specifically to a method for identifying weak areas in tunnels and providing differentiated support based on asymmetric load evolution. The method involves collecting pressure distribution and deformation data of the tunnel cross-section and constructing a continuous arc-length coordinate system along the neutral axis of the support structure. Based on the data and coordinate system, the geometric, stress, and energy states of the tunnel cross-section are analyzed to obtain geometric deformation analysis results, eccentricity evaluation results, and toughness judgment results at any point on the support section. A multi-index collaborative judgment model is constructed based on the above multi-dimensional index results to generate a weighted index distribution map of the tunnel cross-section's weakness. Based on the multi-dimensional results and the index distribution map, differentiated support decisions for the tunnel are designed. This invention identifies weak areas in tunnel support based on multi-dimensional physical indicators of deformation, stress, and energy, and conducts asymmetric differentiated support parameter decisions, realizing the transformation from traditional equal-strength design to asymmetric targeted support, thereby enhancing the stability and safety of the eccentrically loaded side structure.

The application discloses a kind of complex curved surface structural member electric arc fuse additive manufacturing methods based on equal arc length slice, for maximum inclination angle exceeding 45 °, and the outer wall profile can be enclosed by circular segment ring structure piece, the application proposes equal arc length slice forming strategy, is based on the three-dimensional model of part, in the center line section, extract the outer wall profile envelope curve formed by circular segment fitting, along the outer wall envelope curve, the arc length is equal to the segmentation cutting, at each cutting point, construct a radius line through the segmentation point and the center, make the radius line rotate around the center line of part model, form rotation surface, generate additive manufacturing track with this surface as segmentation surface to the part model layering slice, obtain structural member by electric arc fuse additive manufacturing.The method effectively improves the forming stability and material utilization of this kind of complex parts, and significantly shortens production cycle and reduces cost.

This invention provides a method for calculating the axial compression bearing capacity of short welded box-section columns in curved steel structures based on dual nonlinear analysis of beam-column theory and geometric materials, belonging to the field of bearing capacity calculation for curved steel components. It addresses the problems of existing steel structure bearing capacity calculation methods, such as material waste, poor economy, complex modeling, high calculation costs, long calculation times, and inconvenience for parametric research and summarizing design principles. Starting from the basic governing equations of beam-column theory, this invention introduces precise initial geometry, a bilinear elastoplastic material constitutive model, and uses the Galerkin weighted residual method for spatial discretization. Combined with the Newton-Raphson iterative method and arc length control technology, it achieves nonlinear response tracking of the entire process of the component from loading onwards, through material yielding, to reaching its ultimate bearing capacity.

This invention discloses a second-class Coons surface reconstruction and generation method based on arc length parameterization, belonging to the field of computer graphics technology. The steps include: S1, reading the STEP format CAD model: reading the STEP format CAD model file to be repaired, analyzing the geometric topology, locking the quadrilateral hole to be repaired and its four surrounding supporting surfaces, and defining the initial boundary constraint set of the repair area; S2, boundary topology sorting and closed-loop reconstruction: performing spatial geometric analysis on the discrete boundary constraints, reconstructing them into a closed topological loop with connected ends, predicting the consistency of geometric directions of each boundary, marking boundaries with mismatched directions, and completing the closed-loop topology construction. This invention uses arc length reparameterization technology, effectively solving the internal stretching and wrinkling phenomena of surfaces caused by inconsistent boundary curve lengths or parameter jumps in traditional algorithms. The generated surface has good isoparametric lines orthogonality and a smooth visual effect, suitable for repairing Class A surfaces.

The present application relates to the technical field of precise repetitive contour machining control, and particularly relates to a repetitive contour machining iterative learning control method, system, equipment and medium oriented to tolerance compliance. A nominal contour is spatially parameterized modeled by an arc length parameter, a tolerance band constraint is established in the normal direction of each arc length position, and a tolerance constraint feasible region is formed. A normal offset adjustment amount is introduced in the tolerance constraint feasible region, the normal offset adjustment amount is superimposed to the normal component of the nominal contour to obtain a constraint reference contour of the current trial, and a normal contour error of the current trial is calculated. Based on the normal contour error, constraint projection is respectively performed on the control input and the normal offset adjustment amount, and the double-branch alternating sequence of the control input update first and the normal offset adjustment amount update second is iterated successively, so that the actual contour of the subsequent trial converges to the inside of the tolerance band.

The application belongs to the technical field of flexible structure design, and particularly relates to an arch beam structure with variable arc length, which comprises a sliding groove section, a sliding key section, a corrugated beam, a variable-height support column and a variable-length support rod. The corrugated beam is arranged outside the sliding key section and the sliding groove section, and has a wave crest and a wave trough structure. The sliding key section and the sliding groove section are arranged inside the corrugated beam and are spaced apart. The sliding key section and the sliding groove section are staggered. The corrugated beam, the sliding key section and the sliding groove section are all arc structures. The wave crest and the wave trough of the corrugated beam are arranged along the radial direction of the arc structure. When the shape and the arc length of the arch beam change, the variable-height support column and the variable-length support rod will automatically change in height, thereby driving the sliding key section and the sliding groove section to slide relatively. Meanwhile, the corrugated beam uniformly distributes the change in the arc length between adjacent wave crests, so that the external load is uniformly distributed on the arch beam. Then, the arc length changes, so that the size of the fuselage is correspondingly reduced with fuel consumption.

A method for calculating the rolling load distribution of a rolling mill 10, comprising: calculating the contact arc length of at least one of the elastic recovery and elastic reduction regions based on Hooke's law under the plane strain condition of a rolled material 1, the force balance within the belt-roll contact of the rolling mill 10, and the stress distribution in the rolling direction approximated by a function that depends on the position coordinate in the rolling direction of the rolling mill 10; and calculating the rolling load distribution of at least one of the elastic recovery and elastic reduction regions based on the contact arc length.

The application discloses a combustion chamber swirler blade modeling method, comprising the following steps: S1: determining the inner flow channel boundary, the outer flow channel boundary and the average flow surface generatrix of the swirler blade; S2: establishing a cylindrical coordinate system based on the average flow surface generatrix, adopting a cubic spline curve to describe the distribution relationship between the blade geometric angle and the average flow surface generatrix arc length, and solving to obtain the blade center line; S3: giving the thickness distribution of the blade surface, superimposing the thickness on the blade center line, and forming the blade cross section on the average flow surface; S4: extending the blade cross section on the average flow surface along the spanwise direction and intersecting with the inner flow channel boundary and the outer flow channel boundary to form a single swirler blade configuration; S5: arranging in the circumferential direction according to the number of blades to complete the blade modeling; and S6: controlling the blade passage flow area on the average flow surface to monotonously increase along the streamline direction in the modeling, so that the total pressure loss and the swirled number deviation are controlled. Compared with the prior art, the application has the advantages that a combustion chamber swirler blade modeling method and design method are provided, which can reduce the deviation between the designed swirled number and the actual swirled number, prevent non-uniform flow separation, and resist combustion chamber pressure fluctuation.